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Southwest Pulmonary and Critical Care Fellowships
In Memoriam

 Editorials

Last 50 Editorials

(Click on title to be directed to posting, most recent listed first)

Hospitals, Aviation and Business
Healthcare Labor Unions-Has the Time Come?
Who Should Control Healthcare? 
Book Review: One Hundred Prayers: God's answer to prayer in a COVID
   ICU
One Example of Healthcare Misinformation
Doctor and Nurse Replacement
Combating Physician Moral Injury Requires a Change in Healthcare
   Governance
How Much Should Healthcare CEO’s, Physicians and Nurses Be Paid?
Improving Quality in Healthcare 
Not All Dying Patients Are the Same
Medical School Faculty Have Been Propping Up Academic Medical
Centers, But Now Its Squeezing Their Education and Research
   Bottom Lines
Deciding the Future of Healthcare Leadership: A Call for Undergraduate
and Graduate Healthcare Administration Education
Time for a Change in Hospital Governance
Refunds If a Drug Doesn’t Work
Arizona Thoracic Society Supports Mandatory Vaccination of Healthcare
   Workers
Combating Morale Injury Caused by the COVID-19 Pandemic
The Best Laid Plans of Mice and Men
Clinical Care of COVID-19 Patients in a Front-line ICU
Why My Experience as a Patient Led Me to Join Osler’s Alliance
Correct Scoring of Hypopneas in Obstructive Sleep Apnea Reduces
   Cardiovascular Morbidity
Trump’s COVID-19 Case Exposes Inequalities in the Healthcare System
Lack of Natural Scientific Ability
What the COVID-19 Pandemic Should Teach Us
Improving Testing for COVID-19 for the Rural Southwestern American Indian
   Tribes
Does the BCG Vaccine Offer Any Protection Against Coronavirus Disease
   2019?
2020 International Year of the Nurse and Midwife and International Nurses’
   Day
Who Should be Leading Healthcare for the COVID-19 Pandemic?
Why Complexity Persists in Medicine
Fatiga de enfermeras, el sueño y la salud, y garantizar la seguridad del
   paciente y del publico: Unir dos idiomas (Also in English)
CMS Rule Would Kick “Problematic” Doctors Out of Medicare/Medicaid
Not-For-Profit Price Gouging
Some Clinics Are More Equal than Others
Blue Shield of California Announces Help for Independent Doctors-A
   Warning
Medicare for All-Good Idea or Political Death?
What Will Happen with the Generic Drug Companies’ Lawsuit: Lessons from
   the Tobacco Settlement
The Implications of Increasing Physician Hospital Employment
More Medical Science and Less Advertising
The Need for Improved ICU Severity Scoring
A Labor Day Warning
Keep Your Politics Out of My Practice
The Highest Paid Clerk
The VA Mission Act: Funding to Fail?
What the Supreme Court Ruling on Binding Arbitration May Mean to
   Healthcare 
Kiss Up, Kick Down in Medicine 
What Does Shulkin’s Firing Mean for the VA? 
Guns, Suicide, COPD and Sleep
The Dangerous Airway: Reframing Airway Management in the Critically Ill 
Linking Performance Incentives to Ethical Practice 
Brenda Fitzgerald, Conflict of Interest and Physician Leadership 
Seven Words You Can Never Say at HHS

 

 

For complete editorial listings click here.

The Southwest Journal of Pulmonary and Critical Care welcomes submission of editorials on journal content or issues relevant to the pulmonary, critical care or sleep medicine. Authors are urged to contact the editor before submission.

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Entries in SARS-COV2 (6)

Wednesday
Dec152021

Protecting the Public’s Health-Except in Tennessee

State regulatory boards that regulate professionals such as doctors, nurses, psychologists, etc. are often appointed by politicians and headed by lawyers. Under this category has been most Medical Boards and their parent organization the Federation of State Medical Boards. Although they claim to be protecting the public, they seem more concerned with identifying “disruptive” physicians and blacklisting them through the National Practitioner Data Bank (1). However, in July the Federation issued a warning to physicians against propagating COVID-19 vaccine misinformation and disinformation citing a "dramatic increase" by physicians (2). The statement gave some hope that the Federation was striving to maintain some degree of professional standards by saying that spreading disinformation to the public was dangerous because physicians enjoy a high degree of public credibility.

The Tennessee Board of Medical Examiners followed the Federation’s lead by issuing a verbatim restatement warning that physicians who spread false information about COVID-19 vaccinations risk suspension or revocation of their medical license. Under repeated threats by Rep. John Ragan, R-Oak Ridge, co-chair of the State of Tennessee’s Joint Government Operations Committee, the warning was removed on December 7. 

Figure 1. Representative John Ragan.

Rep. Ragan insisted board members do not have the authority to create a new disciplinary offense without the approval of the lawmakers on his committee. He threatened to dissolve the board and appoint all new members if it did not immediately take it down and the Tennessee board succumbed to Rep. Ragan.

Across the country, state medical licensing boards are struggling to balance the politics and public interest with how to respond to scientifically baseless public statements about COVID-19 by some physicians. The Federation says the statements are increasing public confusion, political conflict, preventable illnesses and deaths (3). There have been only a small number of disciplinary actions by medical boards against physicians for spreading false COVID-19 information. Critics say the boards have been weak in responding to these dangerous violations of medical standards. For example, Dr. Lee Merritt, an orthopedic surgeon, from my home state of Nebraska has appeared on talk shows and in lecture halls to spread false information about COVID-19 (4).

Figure 2. Dr. Lee Merritt

Among her claims: that the SARS-CoV2 virus is a genetically engineered bioweapon (the U.S. intelligence community says it is not) and that vaccination dramatically increases the risk of death from COVID (data show the opposite). The entire pandemic, she says in public lectures, is a vast global conspiracy to exert social control. Yet, in October, she was able to renew her medical license in the state of Nebraska. Documents obtained through a public records request by NPR showed it took just a few clicks: 12 yes-or-no questions answered online allowed her to extend her license for another year.

Physician ethics have also been under assault in medical schools. Several medical schools recently founded by healthcare organizations seem overly concerned that their graduates might object to some COVID-19 statements on a scientific basis (5). Through these new medical schools, business interests hope to indoctrinate medical graduates on how to serve the public any way a healthcare administrator tells them. Even a healthcare organization as lofty as the American College of Physicians now has their ethics statement written by a lawyer (6).

These, as well as other examples, demonstrate that as we lose control of the ethics of our profession, we lose control of our profession. Assuming the physicians reading this editorial are against the dissemination of false information, what can we do? One example, came from Houston, Texas where Dr. Mary Bowden, who posted "harmful" and "dangerous misinformation" about Covid-19 and its treatments on social media, had her medical staff privileges suspended. She subsequently resigned from Houston Methodist (7).

We as physicians should work through our medical staffs over these issues. Hopefully, we will not try to repress legitimate concerns from physicians expressing objections to hospital or medical staff policies through appropriate channels. However, if the medical staff chooses to proceed over those objections, each physician can use their conscience to refuse to work with physicians disseminating misinformation. We are one medical family and what hurts one of us, hurts us all.  

Richard A. Robbins, MD                                  

Editor, SWJPCC

References

 

  1. Robbins RA. The disruptive administrator: tread with care. Southwest J Pulm Crit Care. 2016:13(2):71-9. doi: http://dx.doi.org/10.13175/swjpcc049-16.
  2. Federation of State Medical Boards. FSMB: Spreading Covid-19 Vaccine Misinformation May Put Medical License at Risk. Available at: https://www.fsmb.org/advocacy/news-releases/fsmb-spreading-covid-19-vaccine-misinformation-may-put-medical-license-at-risk/ (accessed 12/13/21).
  3. Sawyer N, E Bloomgarden E, Cooper M, Nichols T, Hickie C. Opinion: State medical boards should punish doctors who spread false information about covid and vaccines. The Washington Post. September 21, 2021. Available at: https://www.washingtonpost.com/opinions/2021/09/21/state-medical-boards-should-punish-doctors-who-spread-false-information-about-covid-vaccines/ (accessed 12/13/21).
  4. Brumfiel G. A doctor spread COVID misinformation and renewed her license with a mouse click. Heard on All Things Considered. November 4, 2021. Available at: https://www.npr.org/sections/health-shots/2021/11/04/1051873608/a-doctor-spread-covid-misinformation-and-renewed-her-license-with-a-mouse-click (accessed 12/13/21).
  5. Shireman R. For-Profit Medical Schools, Once Banished, Are Sneaking Back. The Century Foundation. March 20, 2020. Available at: https://tcf.org/content/commentary/for-profit-medical-schools-once-banished-are-sneaking-back-onto-public-university-campuses/ (accessed 12/13/21).
  6. Sulmasy LS, Bledsoe TA; ACP Ethics, Professionalism and Human Rights Committee. American College of Physicians Ethics Manual: Seventh Edition. Ann Intern Med. 2019 Jan 15;170(2_Suppl):S1-S32. [CrossRef] [PubMed]
  7. Watts A, Elassar A. Texas doctor suspended for spreading 'misinformation' about Covid-19 submits resignation letter. November 16, 2021. Available at: https://www.cnn.com/2021/11/13/us/houston-doctor-suspended-covid-19/index.html (accessed 12/13/21).

Cite as: Robbins RA. Protecting the Public’s Health-Except in Tennessee. Southwest J Pulm Crit Care. 2021;23(6):162-4. doi: https://doi.org/10.13175/swjpcc067-21 PDF 

 

Wednesday
May052021

Combating Morale Injury Caused by the COVID-19 Pandemic

Healthcare burnout is on the rise during the great COVID-19 pandemic. Healthcare burnout is emotional exhaustion, cynicism and depersonalization, reduced professional efficacy and personal accomplishment caused by work-related stress. Numerous factors cause healthcare burnout: long work hours, lack of respect, difficult patients, feeling of helplessness, lack of healthcare worker safety and leadership seemingly disconnected from the universal goal of all healthcare workers—saving people’s lives. Morale injury occurs when hands are tied from giving each and every patient the very best care, he/she deserves. Healthcare workers experience disappointment from doing a great job when saving lives. Hearing negative feedback about inconsequential small details and lack of praise for their great deeds can understandably lead to depression, anxiety and fear about the future. In order to combat negative feelings built up over time, it is important to fight back with positive feelings. This requires active positive thinking and not negative thoughts that can consume you. Throughout the day and night all kinds of thoughts flow through our mind. This cannot be controlled but you can counter negative thoughts by thinking of positive thoughts. There are things to be grateful for everyday in life: 1) life itself; 2) family; 3) purpose; 4) belonging to something greater than yourself; 5) the weather; and 6) all of the boundless opportunities that lay ahead. According to Gautama Buddha (1),

“to enjoy good health, to bring true happiness to one’s family, to bring peace to all, one must first discipline and control one’s own mind. If a man can control his mind, he can find the way to Enlightenment, and all wisdom and virtue will naturally come to him”.

Healthcare workers expend so much of their time and energy helping others, they themselves can end up in a void. Therefore, it is important that healthcare workers set aside a time for rejuvenation. (I personally find exercise as a great way to recover and let my mind clear after a long day in the hospital). Anything that gives you joy will suffice such as listening to music, singing, reading, laughing, playing with your children or having a funny conversation with your friends and family. Even something as simple as smiling at a stranger walking by and saying good morning will not only make you feel better, but it will also make the other person feel better. I say hello to everyone I pass in the hospital hallway and it makes me feel good.

It is always life or death in the intensive care unit (ICU). Working as an Intensivist, I am exposed to extraordinary situations every day. Thus, prior to walking into the ICU, I make it a point to think of something positive and smile because once those doors open up all Hell can break lose. Lack of personal protective equipment (PPE) because of the COVID-19 pandemic and staff isolation has demoralized everyone. I try my best to provide some encouragement in this very high mortality setting. It is important to let the staff know about those patients that survived so they know they are truly making a difference and see there is light at the end of the tunnel (2).

As Friedrich Nietzsche said, “that which does not kill us, makes us stronger” (1). That saying can be true for some but not all. You have to have a particular mindset in order to learn from these terrible situations and rise above like a phoenix from the ashes. “These life experiences have been called ‘crucibles’, severe test or trial that is unplanned, intense and often traumatic” (3). Unfortunately, not all of us can handle such diversity and may develop post-traumatic stress from such life experiences and never recover. That is why it is important to try and look at such profound life altering events as lessons. There is always something to be learned from every situation. Even negative events can be turned into positive experiences that build on a person’s character. For example, immediately after a COVID-19 surge descended on one hospital I was working at, I immediately learned to question the reliability of the estimated oxygen saturation measured by pulse oximetry (SpO2) and to intubate as quickly and as safely as I could in order to avoid exposing staff to the SARS-CoV-2 virus as well as preventing cardiac arrest during intubation of those critically ill patients. It was a Sunday, the day before Doctor’s day 2020 in America when all of a sudden, the flood gates opened from the wards and literally five patients within minutes all required immediate intubation because all of them had critical oxygen levels despite maximal high-flow therapy. One after another the patients arrived in succession into the ICU and I went from bed-to-bed intubating all of them. This kicked off many months of treating very high numbers of critically ill patients two to three times the volume I was used to treating. Instead of being overwhelmed by the pressure, I focused on each patient and discovered the best treatment options all the while making sure that I did not add to the depressing morale by complaining about how difficult the working conditions were in order to keep the ICU team motivated. As Winston Churchill repeated during the daily bombardment of England by the Germans in WWII—keep calm and carry on (4).

I had never seen the need for so many arterial blood gas draws (ABG) and neither had the laboratory staff. One evening around midnight I needed around 20 ABGs. Instead of shrinking from the challenge, two laboratory technicians stepped up and brought the machine that processes the ABGs to the ICU and enthusiastically ran all of the tests. This made a huge difference in patients’ outcomes because what I was seeing was a big discrepancy between the continuous patient SpO2 monitoring and the actual partial pressure oxygen (PaO2). The true measurement of PaO2 derived from the ABG helped confirm my suspicion that many patients were actually hypoxic despite having normal readings on the pulse oximeter, allowing me to adjust the ventilator appropriately and preventing death. I praised the laboratory workers in person and let their supervisors know what a terrific job had been done. They never complained despite being understaffed (some of their colleagues quit and never showed up for work that day). The lesson I learned from all of that was that as long as I kept pushing myself, I could save those patients despite the large volume and lack of supplies which gave me a great feeling of accomplishment. I then travelled to other hospitals facing similar situations and was able to continue this way for over a year.

Now I realize that not everyone can handle the pressure that follows a crucible event. I, myself, struggle as well and I have to remind myself to carry on and stay positive, which is not always an easy task. I definitely have not mastered this strategy yet, but I am trying. Marcus Aurelius said “you have the power over your mind – not (on) outside events. Realize this, and you will find strength” (1). Throughout our lives we will encounter hardships but as we get through one and then the other encounter, we realize that we can handle it. Know that the next life event is just another challenge. From the 2nd century BCE Epicurus reminds us that “a person will never be happy if they are anxious about what they do not have” (1). Use that incredible focus and discipline you summoned from deep within during decades of study to train your mind into thinking positively. “Our life is shaped by our mind; we become what we think. Joy follows a pure thought like a shadow that never leaves,” Gautama Buddha (1). Remain altruistic and continue to take care of those in need and you will live a happy and joyous life.

Evan D. Schmitz, MD

La Jolla, CA USA

References

  1. Robledo, IC. 365 Quotes to Live Your Life By. Powerful, Inspiring, & Life-Changing Words of Wisdom to Brighten Up Your Days. Published by I. C. Robledo, 2019.
  2. https://www.goodreads.com/quotes/521459-there-is-a-light-at-the-end-of-everytunnel#:~:text=Quotes%20%3E%20Quotable%20Quote,%E2%80%9CThere%20is%20a%20light%20at%20the%20end%20of%20every%20tunnel,to%20be%20longer%20than%20others.%E2%80%9D
  3. Warren G. Bennis and Robert J. Thomas. Crucibles of Leadership. 2002. Harvard Business Review.
  4. https://london.ac.uk/about-us/history-university-london/story-behind-keep-calm-and-carry.

Cite as: Schmitz ED. Combating Morale Injury Caused by the COVID-19 Pandemic. Southwest J Pulm Crit Care. 2021;22(5):106-8. doi: https://doi.org/10.13175/swjpcc015-21 PDF

Monday
Jan042021

Clinical Care of COVID-19 Patients in a Front-line ICU

Robert A. Raschke MD

Tyler J. Glenn MD

Kim I. Josen MD

HonorHealth Scottsdale Osborn Medical Center

Scottsdale, AZ USA

These are some clinical observations made after over the past 10 months, working in a busy COVID-19 ICU unit in Scottsdale, AZ. The opinions expressed here are those of the private practice authors.

Overview of triage and rounding on large numbers of COVID-19 patients in the ICU service. Our approach to bedside care of our ICU service has required abbreviation for the sake of efficiency in the face of more than a doubling of our census. Our approach to rounding is opinion-based. We’ve been forced to evolve our triage and rounding systems in order to survive.

Our hospital uses the Abbott ID-Now® rapid point-of -are test for screening all COVID-19-asymptomatic patients admitted to our hospital, but due to its low sensitivity in hospitalized patients (1). We do not trust it to rule-out COVID-19 in patients with pneumonia being admitted to the ICU and also order an in-house PCR for such patients prior to, or upon ICU admission. We are cautious about transferring COVID-19 patients out of the ICU on bilevel positive airway pressure (BiPAP) or high-flow nasal cannula since many such patients have deteriorated and bounced-back to the unit within the subsequent week.

We try to see as many of our COVID-19 ICU patients (who are practically all our patients) sequentially, without interruption if possible, leaving our masks and gowns on continuously and moving quickly from room to room, changing only gloves between patients unless a bacterial pathogen that requires contact isolation has been identified. Little/no helpful information can be gleaned by entering the room of patient who is proned in a rotoprone bed. Such patients may only be supined for brief periods, sometimes in the middle of night shift; and discussion with the nurses regarding their physical exam findings during supine positioning is high yield. Auscultation of COVID-19 patients using isolation stethoscopes is seldom of value. Palpation of the neck/trunk for crepitus, neurological examination (especially in patients emerging from heavy sedation and/or supined after prolonged proning), and assessment of fluid status are high yield. We keep track of how many days the patient has received mechanical ventilation, the cumulative fluid balance (which sometimes gets very positive), and signs and lab values possibly related to complications of COVID-19 discussed below. The duration of antibiotics and sedation medications needs constant monitoring to avoid overuse. We do not routinely follow serial INR, ferritin, CRP, or D-dimer, since these do not affect patient management. We sometimes use BNP and procalcitonin to trigger further cardiac or infectious disease evaluations respectively. We do not treat isolated elevated procalcitonin with antibiotics, nor do we treat isolated d-dimer with therapeutic dose anticoagulation.

We have been conservative in our treatment of COVID-19, relying primarily on dexamethasone and usual evidence-based critical care practice. Over the course of the outbreak, our conservative approach has been validated; various hyped but off-label therapies (hydroxychloroquine, antirheumatic therapies, universal therapeutic anticoagulation) have failed to show benefit and possibly caused harm when subjected to evidence-based scrutiny (2,3). Benefits of remdesivir in patients with advanced respiratory failure seem unclear/minimal (4). Most of our patients present to the ICU in the second or third week of illness, already having developed IgG antibodies and therefore unlikely to benefit from convalescent serum or monoclonal antibodies.

Clinical course and management of respiratory failure. Many patients remain awake and able to tolerate spontaneous ventilation with non-invasive ventilation and/or high-flow nasal canula oxygen delivering high FiO2, for as long as two weeks before they either recover or require endotracheal intubation. Before the current outbreak, it was unusual to manage severely hypoxemic patients without intubation and mechanical ventilation. For COVID-19, it seems to be the norm, with intubation delayed until the last possible moment, as it is unclear that mechanical ventilation with its attendant complications (immobility, sedation, invasive support apparatus) offer any definite benefit. Once intubated, many patients seem to transition abruptly to refractory hypoxemia and hypercarbia, which previously would have made them candidates for Extracorporeal membrane oxygenation (ECMO) transfer. In one recent case, we requested ECMO evaluation for a patient prior to intubation, anticipating that he would deteriorate badly immediately thereafter. The consultant requested intubation before ECMO evaluation, and indeed, once intubated, the patient immediately became too unstable for uncannulated transfer. In general, the numbers of patients fulfilling historical criteria for ECMO consideration have greatly overwhelmed ECMO capacity.

We have tried several approaches to invasive mechanical ventilation, but each has drawbacks. Our primary mode of ventilation, pressure-regulated volume control, has sometimes resulted in high plateau and driving pressures as respiratory system compliance worsens. We’ve used pressure control ventilation in some patients to limit driving pressure, but this has led to unrecognized worsening of respiratory acidosis in some. We have managed several episodes of cardiac arrest due to uncontrolled combined respiratory and metabolic acidosis in COVID-19 patients being treated with permissive hypercapnia ventilation who subsequently developed acute renal failure. We are now trying airway pressure-release ventilation (APRV) as an optional approach in which we try to avoid proning and heavily sedating the patient, but aim for Richmond Agitation-Sedation Scale (RASS) of -1 to -2 and allow maintenance of spontaneous respiratory efforts by the patient during “T high”. It is not clear whether any of these approaches results in better clinical outcomes.

Our use of prone positioning has increased dramatically. Self-proning of awake patients receiving non-invasive mechanical ventilation or high-flow nasal canula oxygen has allowed some to survive episodes of severe oxygen desaturation and avoid intubation. We have extensively utilized proning in mechanically ventilated patients with PaO2/FiO2 <150. Several of our patients experienced cardiopulmonary arrest when briefly supined resulting in several fatalities. Consequently, we have learned to placed US-guided internal jugular central venous catheters and chest tubes in patients in proned and semi-proned positions. We have noted that at some point, prone positioning needs to be abandoned if the patient is ever going to recover, even if their PaO2/FiO2 ratio falls upon supine positioning. In such patients, supine positioning allows reduction of heavy sedation and resumption/improvement of spontaneous breathing efforts that may allow ventilator weaning to slowly proceed.

Complications of COVID-19 in the ICU. We have seen more barotrauma than previously described, some occurring during non-invasive ventilation prior to endotracheal intubation (5). Point of care chest ultrasonography has been instrumental in several cases in which anterior pneumothoraces were not clearly apparent on chest radiography, except perhaps as a deep sulcus sign, and also to rapidly rule-out pneumothorax as a cause of acute cardiopulmonary decompensation.

Hypotension requiring intravenous vasopressors is common (6). In many cases, it seems due to sepsis and sedation with propofol and/or dexmedetomidine. We have occasionally seen acute or chronic cardiomyopathy, but not as often as noted early in the pandemic (7). We have repeatedly diagnosed relative adrenal insufficiency later in the hospital course –after dexamethasone has been discontinued. Such patients commonly received etomidate during intubation which could possibly be contributory.

Bacterial co-infections are uncommon at presentation, consistent with published meta-analysis (8), and we do not routinely give antibiotics to all patients with COVID-19 pneumonia up front. Later in the course of mechanical ventilation, many patients experience recurrent fever, leukocytosis, elevated procalcitonin and/or worsening pulmonary status prompting endotracheal secretion and blood cultures and empirical antibiotics. We have commonly isolated a wide variety of potential bacterial pathogens from the respiratory secretions of such patients including methicillin-sensitive Staphylococcus aureus (MRSA), methicillin-resistant Staphylococcus aureus (MRSA), gram negative rods, some multi-drug resistant. We recently isolated carbapenem-resistant Enterobacter. It is uncertain whether these represent true cases of secondary pneumonia.

Coagulopathy related to COVID-19 is complex and increased risk of thrombosis and bleeding seem apparent (9). We administer enhanced prophylactic-dose anticoagulation to all our patients (typically 40mg enoxaparin every 12 hours in patients without morbid obesity or renal failure), but do not treat elevated d-dimers with therapeutic anticoagulation in the absence of documented venous thromboembolism (4). A minority of our patients have had documented venous thromboemboli prior to ICU admission and a few have had acute myocardial infarctions and strokes. We try to get CT angiography of the chest and doppler ultrasound of the lower extremities on all patients requiring mechanical ventilation. Bedside ultrasonography demonstrating acute right heart failure has been helpful in a few cases in which pulmonary emboli were suspected but the patient too unstable for CT angio or VQ scan. Three of our patients experienced CNS hemorrhages, two of which were fatal. Gastrointestinal bleeding is not uncommon.

Acute renal failure is common and complicates permissive hypercarbia, sometimes necessitating high dose bicarbonate infusions (6). Circuit thrombosis during dialysis is common, perhaps a manifestation of COVID-19 coagulopathy, and sometime necessitating therapeutic anticoagulation.

End of life issues. It is our impression that the mortality in intubated patients is higher this winter than it was previously in the pandemic. This might be because patients are receiving more aggressive therapy earlier in the course of illness, and often are only intubated after failing a prolonged course of non-invasive mechanical ventilation. Perhaps this selects treatment-unresponsive patients for intubation. Prognostication seems very difficult. We treated an 89-year patient with severe comorbidities who rapidly recovered after a 4-day course of mechanical ventilation and a 28-year-old previously healthy man who died despite receiving veno-venous ECMO. We have not found clinical scoring systems such as

Sequential Organ Failure Assessment (SOFA) to be helpful in prognosis, since many patients have isolated severe single organ dysfunction at the time of ICU admission, and therefore have similar SOFA scores – mostly comprised of points given for severe respiratory failure. Old-fashioned bedside common sense and family discussion still seem the best approach to determining code status. It is logistically difficult/impossible to safely administer CPR to some patients who are proned, especially those that are morbidly obese. We have told families that we are instituting limited code status (no CPR, no ACLS) in such situations, subsequently discussing resumption of full code status if/when the patient recovers enough to tolerate resumption of supine positioning.

Psychosocial issues. Incredible emotional injury is being experienced by patients’ families. Several of our patients come from families in which two or three primary relatives have already died from COVID-19. We called one patient’s wife to inform her that her husband had narrowly survived a prolonged arrest secondary to pneumothorax, interrupting her during her son’s funeral, who had died from COVID-19 pneumonia the previous week. Eventually, that family suffered the death of three primary relatives from COVID-19 over the course of three weeks.

We have tried to use cellular technology to help mitigate restricted family visitation, but it seems a poor substitute. Our nurses have had some patients make cell phone video messages to their loved ones before intubation – sometimes the last memory their families will ever have of them. We have held our cellphones by the ears of COVID-19 patients as they are dying so that their loved ones can say goodbye. It was heart-wrenching to hear a husband of 42 years sobbing uncontrollably over the phone, telling his dying wife that he loved her, and how much he’s going to miss her as we prepared to remove her endotracheal tube to let her die.

The nurses, respiratory techs and physicians have shown incredible bravery and self-sacrifice and outward morale is good. But all are suffering severe vicarious injuries the full effect of which may not be apparent for years to come. Much of the human connection previously so important to ICU practice has been lost – few of the patients can interact, and the families are generally not allowed to visit. We simply don’t have the time anymore to call them as often as we would like, and it’s unusual to call them with good news. We should plan for a future increase in PTSD and burn-out among healthcare providers.

We are grateful to have received my COVID-19 vaccination, and I was sincerely astounded by the organizational excellence of the vaccination event implemented by HonorHealth here in Phoenix. They did a very good job that will serve our entire vaccine-willing population in the coming months.

References

  1. Basu A, Zinger T, Inglima K, Woo KM, Atie O, Yurasits L, See B, Aguero-Rosenfeld ME. Performance of Abbott ID Now COVID-19 Rapid Nucleic Acid Amplification Test Using Nasopharyngeal Swabs Transported in Viral Transport Media and Dry Nasal Swabs in a New York City Academic Institution. J Clin Microbiol. 2020 Jul 23;58(8):e01136-20. [CrossRef] [PubMed]
  2. WHO Solidarity Trial Consortium, Pan H, Peto R, Henao-Restrepo AM, et al. Repurposed Antiviral Drugs for Covid-19 - Interim WHO Solidarity Trial Results. N Engl J Med. 2020 Dec 2:NEJMoa2023184. [CrossRef] [PubMed]
  3. Salama C, Han J, Yau L, et al. Tocilizumab in Patients Hospitalized with COVID-19 Pneumonia. N Engl J Med. 2020 Dec 17. [CrossRef] [PubMed]
  4. American Society of Hematology. COVID-19 Resources: COVID-19 and VTE/Anticoagulation: Frequently asked questions. Version 5.1 (last updated December 24, 2020). Available at: https://www.hematology.org/covid-19/covid-19-and-vte-anticoagulation (accessed 1/3/21).
  5. Botta M, Tsonas AM, Pillay J, et al., PRoVENT-COVID Collaborative Group. Ventilation management and clinical outcomes in invasively ventilated patients with COVID-19 (PRoVENT-COVID): a national, multicentre, observational cohort study. Lancet Respir Med. 2020 Oct 23:S2213-2600(20)30459-8. [CrossRef] [PubMed]
  6. Cummings MJ, Baldwin MR, Abrams D, et al. Epidemiology, clinical course, and outcomes of critically ill adults with COVID-19 in New York City: a prospective cohort study. Lancet. 2020 Jun 6;395(10239):1763-1770. [CrossRef] [PubMed]
  7. Arentz M, Yim E, Klaff L, Lokhandwala S, Riedo FX, Chong M, Lee M. Characteristics and Outcomes of 21 Critically Ill Patients With COVID-19 in Washington State. JAMA. 2020 Apr 28;323(16):1612-1614. [CrossRef] [PubMed]
  8. Langford BJ, So M, Raybardhan S, Leung V, Westwood D, MacFadden DR, Soucy JR, Daneman N. Bacterial co-infection and secondary infection in patients with COVID-19: a living rapid review and meta-analysis. Clin Microbiol Infect. 2020 Dec;26(12):1622-1629. [CrossRef] [PubMed]
  9. Helms J, Tacquard C, Severac F, et al., CRICS TRIGGERSEP Group (Clinical Research in Intensive Care and Sepsis Trial Group for Global Evaluation and Research in Sepsis). High risk of thrombosis in patients with severe SARS-CoV-2 infection: a multicenter prospective cohort study. Intensive Care Med. 2020 Jun;46(6):1089-1098. [CrossRef] [PubMed]
  10. Hayek SS, Brenner SK, Azam TU, et al. In-hospital cardiac arrest in critically ill patients with covid-19: multicenter cohort study. BMJ. 2020 Sep 30;371:m3513. [CrossRef] [PubMed]

Cite as: Raschke RA, Glenn TJ, Josen KI. Clinical Care of COVID-19 Patients in a Front-line ICU. Southwest J Pulm Crit Care. 2021;22(1):11-15. doi: https://doi.org/10.13175/swjpcc070-20 PDF

Saturday
Oct032020

Trump’s COVID-19 Case Exposes Inequalities in the Healthcare System

Early Friday morning (October 2, 2020) President Trump announced through Twitter that he had tested positive for COVID-19 (aka SARS-CoV-2). Later Friday afternoon he was whisked away by helicopter for a 10-minute ride to Walter Reed National Military Medical Center (WRNMMC, formerly Bethesda Naval Medical Center) which is across the street from the National Institutes of Health campus in Bethesda. There he received REGN-COV2, a combination of two monoclonal antibodies (REGN10933 and REGN10987) directed against the spike protein of the COVID-19 virus. In addition, he received a dose of remdesivir (an antiviral drug) as well as zinc, vitamin D, famotidine (Pepcid®), melatonin and aspirin. As of Saturday morning, Trump has done well by all accounts.

All the therapies administered to Trump are unproven but have some evidence supporting their use against COVID-19. The Trump administration issued an emergency use authorization for remdesivir earlier this year after the drug showed moderate effectiveness in improving outcomes for patients who were hospitalized with the coronavirus (1). REGN-COV2 is now in Phase 3 clinical trials, is still experimental and has not received emergency use approval from the FDA. However, it had sufficient evidence for President Trump to receive the drug in response to a compassionate use request to the manufacturer (2). There is also some evidence that the other ancillary therapies might be useful therapies against COVID-19 (3-7).

What these therapies have in common is that the available scientific evidence of their efficacy was funded, at least in part, by the US government, most prominently the FDA’s Coronavirus Treatment Acceleration Program (CTAP) (8). The US government has spent several billion dollars on COVID-19 therapies including $450 million on REGN-COV2 and at least $75 million for remdesivir (9,10). The success of the program is remarkable in light of the disbanding of the National Security Council pandemic unit which had predicted the disaster we are now enduring (11). The ingenuity of the scientific community is truly amazing when motivated by billions of dollars. Those Americans who actually pay taxes should be proud of their government officials for making such successful investments on their behalf.

President Trump’s care is in contrast to my own or the general public. I recently became ill with increasing shortness of breath, orthopnea and a nonproductive cough but no fever. Because I have a history of diastolic dysfunction, I had assumed this was heart failure. As a physician who has many friends in the medical community, I am privileged to be able to call my cardiologist who saw me later that day. The general public might well have had to accept his next available appointment which was over 3 months or go to an emergency room. After 2 days, and 5 trips to a free-standing radiology center and 2 trips to a laboratory testing site, it became clear that I had left lower pneumonia by chest-x-ray and a normal brain naturetic peptide. Later that day I went to a free-standing clinic and had a rapid COVID-19 test which was negative. Because my presentation was atypical for bacterial pneumonia, I called my pulmonary physician who also saw me later that day. He ordered a coccioidomycosis serology and a COVID-19 test by PCR. The former because of the high possibility of Valley Fever which can cause up to a third of community-acquired pneumonias in Arizona and the latter because of the poor sensitivity of the rapid COVID-19 antibody test (12,13). However, I was not able to schedule the collection of the nasal swab or blood for 10 days at a free-standing laboratory. This seems excessively long and my pulmonologist decided against empirical treatment for Valley Fever because of a potential drug interaction with one of my heart medications (dofetilide).

President Trump often brags that the US has the greatest healthcare system in the world and for him it is. Although he repeatedly touted ineffective therapies for COVID-19 such as hydroxychloroquine, bleach and light and belittled those who wore masks, when he got sick only scientifically based therapy was used despite the expense (14). The general public probably does not have President Trump’s or my access to physicians. Donald Trump, the White House staff, and some professional athletes are getting daily COVID-19 tests but the rest of us taxpayers are forced to wait 10 days to get a nasal swab and a blood sample drawn.

USA Today is now reporting that President Trump had earned capital gains from Regeneron Pharmaceuticals and Gilead Sciences, the manufacturers of REGN-COV2 and remdesivir (15). According to a 2017 financial disclosure form filed with the U.S. Office of Government Ethics in June 2017, Trump had a capital gain of $50,001 to $100,000 for Regeneron Pharmaceuticals and $100,001 to $1 million for Gilead. Trump’s subsequent disclosure forms, including his 2020 form signed July 31, did not list Regeneron or Gilead. Ostensibly, he, other family members and close associates sold their stocks to avoid any apparent conflict of interest.

Based on previous experience, I remain skeptical that therapies developed and distributed by our tax monies will really be free. Will the clever businessmen who run drug companies take money from the US government for product development and then bill a hefty sum for their product? Will the rush to develop a vaccine before the November elections put expediency over safety? Some vaccines rushed to market such as the polio vaccine of 1955 or the swine flu vaccine of 1976 resulted in serious side effects in some recipients (16). As Trump is so fond of saying, “We will have to wait and see”.

Richard A. Robbins, MD

Editor, SWJPCC

References

  1. FDA. COVID-19 Update: FDA Broadens Emergency Use Authorization for Veklury (remdesivir) to Include All Hospitalized Patients for Treatment of COVID-19. August 28, 2020. Available at: https://www.fda.gov/news-events/press-announcements/covid-19-update-fda-broadens-emergency-use-authorization-veklury-remdesivir-include-all-hospitalized#:~:text=Today%2C%20as%20part%20of%20its,laboratory%2Dconfirmed%20COVID%2D19%2C (accessed 10/3/20).
  2. Farr C, Stankiewicz K. Here’s everything we know about the unapproved antibody drug Trump took to combat coronavirus. CNBC. October 2, 2020. Available at: https://www.cnbc.com/2020/10/02/what-we-know-about-regeneron-antibody-drug-trump-took-to-combat-coronavirus.html (accessed 10/3/20).
  3. Arentz S, Yang G, Goldenberg J, et al. Clinical significance summary: Preliminary results of a rapid review of zinc for the prevention and treatment of SARS-CoV-2 and other acute viral respiratory infections [published online ahead of print, 2020 Aug 1]. Adv Integr Med. 2020;10.1016/j.aimed.2020.07.009. [CrossRef] [PubMed]
  4. Entrenas Castillo M, Entrenas Costa LM, Vaquero Barrios JM, Alcalá Díaz JF, López Miranda J, Bouillon R, Quesada Gomez JM. "Effect of calcifediol treatment and best available therapy versus best available therapy on intensive care unit admission and mortality among patients hospitalized for COVID-19: A pilot randomized clinical study". J Steroid Biochem Mol Biol. 2020 Oct;203:105751. [CrossRef] [PubMed]
  5. Freedberg DE, Conigliaro J, Wang TC, Tracey KJ, Callahan MV, Abrams JA; Famotidine Research Group. Famotidine Use Is Associated With Improved Clinical Outcomes in Hospitalized COVID-19 Patients: A Propensity Score Matched Retrospective Cohort Study. Gastroenterology. 2020 Sep;159(3):1129-1131.e3. [CrossRef] [PubMed]
  6. Zhang R, Wang X, Ni L, et al. COVID-19: Melatonin as a potential adjuvant treatment. Life Sci. 2020;250:117583. [CrossRef] [PubMed]
  7. Mohamed-Hussein AAR, Aly KME, Ibrahim MAA. Should aspirin be used for prophylaxis of COVID-19-induced coagulopathy? Med Hypotheses. 2020 Jun 8;144:109975. [CrossRef] [PubMed]
  8. FDA. Coronavirus Treatment Acceleration Program (CTAP). Available at: https://www.fda.gov/drugs/coronavirus-covid-19-drugs/coronavirus-treatment-acceleration-program-ctap (accessed 10/3/20).
  9. Loftus P, Walker J.  U.S. Commits $2 Billion for Covid-19 Vaccine, Drug Supplies. Wall Street Journal. July 7, 2020. Available at: https://www.wsj.com/articles/u-s-commits-2-billion-for-covid-19-vaccine-drug-supplies-11594132175 (accessed 10/3/20).
  10. Public Citizen. The Public Already Has Paid for Remdesivir. Available at: https://www.citizen.org/news/the-public-already-has-paid-for-remdesivir/ (accessed 10/3/20).
  11. Riechmann D. Trump disbanded NSC pandemic unit that experts had praised. AP News. March 14, 2020. Available at: https://apnews.com/article/ce014d94b64e98b7203b873e56f80e9a (accessed 10/3/20).
  12. Valdivia L, Nix D, Wright M, Lindberg E, Fagan T, Lieberman D, et al. Coccidioidomycosis as a common cause of community-acquired pneumonia. Emerg Infect Dis. 2006;12(6):958-62. [CrossRef] [Pubmed]
  13. Guglielmi G. Fast coronavirus tests: what they can and can't do. Nature. 2020 Sep;585(7826):496-498. [CrossRef] [PubMed]
  14. Robbins RA. Lack of natural scientific ability. Southwest J Pulm Crit Care. 2020;21(1):15-22. [CrossRef]
  15. Tyko K. Trump COVID-19 treatment: President had stakes in Regeneron and Gilead, makers of antibody cocktail, Remdesivir. USA Today. October 3, 2020. Available at: https://www.usatoday.com/story/money/2020/10/03/trump-walter-reed-treatment-president-regeneron-gilead-remdesivir/3610111001/ (accessed 10/3/20).
  16. Trogen B, Oshinsky D, Caplan A. Adverse Consequences of Rushing a SARS-CoV-2 Vaccine: Implications for Public Trust. JAMA. 2020 Jun 23;323(24):2460-2461. [CrossRef] [PubMed]

Cite as: Robbins RA. Trump’s COVID-19 Case Exposes Inequalities in the Healthcare System. Southwest J Pulm Crit Care. 2020;21(4):82-5. doi: https://doi.org/10.13175/swjpcc055-20 PDF 

Saturday
May162020

Improving Testing for COVID-19 for the Rural Southwestern American Indian Tribes

Arshia Chhabra1

Varinn Sood2

Vanita Sood, MD3

Akshay Sood, MD, MPH4,5

 

1La Cueva High School, 7801 Wilshire Ave NE, Albuquerque, NM USA

2Albuquerque Academy, 6400 Wyoming Blvd. NE, Albuquerque, NM USA

3Andrew Weil Center for Integrative Medicine, University of Arizona, 655 N Alvernon Way, Tucson, AZ USA;

4Department of Internal Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM USA; 5Black Lung Program, Miners’ Colfax Medical Center, Raton, NM, USA.

 

Coronavirus disease 2019 (COVID-19) is caused by the severe acute respiratory syndrome-related coronavirus-2 (SARS–CoV-2) infection. The United States (US) currently has more officially reported cases and deaths from COVID-19 than any other country in the world. The rural Southwestern American Indian (SAI) tribes are disproportionately affected, due to genetics, immunological naivety, social determinants of health, and high prevalence of concomitant comorbidities and co-exposures (1). On March 30, 2020, the New Mexico Governor, Michelle Lujan Grisham, informed the US President Donald Trump of the “incredible spikes” in cases of COVID-19 within the Navajo Nation in the rural Four Corners region of the American Southwest (2). The Governor warned that the disease “... could wipe out those tribal nations.”

Use of COVID-19 testing as an approach to combating the pandemic is supported by an Iceland-based epidemiological study, and endorsed by the World Health Organization (3). Rural states in the US rank higher in prevalence of COVID-19 risk factors (hypertension, obesity, and diabetes), but rank lower in overall testing rates (4). Notably, several Southwestern states such as Arizona, Texas and Oklahoma have among the lowest testing rates in the country (5). Taken together, these results suggest that the current COVID-19 surveillance does not effectively capture medically vulnerable rural populations in the Southwest (4). Testing in the SAI tribal communities is further limited by the following reasons: 1) misinformation on tests due to the lack of broadband Internet access; 2) inadequate access to test sites due to lack of transportation and long travel distances; 3) traditional mistrust of the healthcare system; 4) concern about mishandling of biological samples; 5) misunderstanding that molecular assays interpret the genetic structure of the virus and not their people; 6) difficulty paying for the tests; and 7) nationwide shortage of test kits. Buy-in from community leaders and traditional healers, utilizing culturally sensitive communications, and access to broadband Internet are crucial to improving effective testing-based surveillance in these communities.

A large number of molecular and serological tests for COVID-19 are currently available, many of which lack evaluation data. Molecular tests, useful for establishing a diagnosis, utilize respiratory tract specimens to assess for the presence of nucleic acid targets specific to SARS–CoV-2 using the reverse transcriptase-polymerase chain reaction (RT-PCR) or nucleic acid amplification assays. RT-PCR–based assays performed in the laboratory on nasopharyngeal swabs collected by trained professionals are currently the cornerstone of COVID-19 diagnostic testing. Most RT-PCR assays take a few hours to complete, but the Cepheid assay has shortened the test duration to 45 minutes (6). Recent molecular tests such as CRISPR-Case12-based lateral flow assay and Abbott ID Now™, utilizing isothermal nucleic acid amplification technology for the qualitative detection of viral RNA have shortened the turnaround time further (7). Unlike molecular tests, serological tests may be useful in public health surveillance and vaccine evaluation, but not as the sole test for diagnosing the acute stage of the disease (8). Performed on blood specimens, serological tests use formats such as enzyme-linked immunosorbent assay and rapid lateral flow immunoassay, to detect immunoglobulin M (IgM) and/or immunoglobulin G (IgG) antibodies, which are produced by the body at approximately 10 days and 20 days respectively following COVID-19 infection. Current molecular and serological tests are laboratory-based and not easily available in the SAI tribal settings.

Living far away from hospitals, rural SAI residents need easy access to sample collection venues.  Across the world, many different sample collection venues can serve as useful prototypes, which includes drive-through-, booth-, mobile laboratory-, and home-based approaches. The latter approach involves the use of self-test kits, which are ideal. The approach involves kits containing instructions for testees to self-collect nasal swabs (or possibly early morning salivary specimens (9)) for molecular tests, or finger-stick blood samples for serologic tests. The FDA recently granted emergency clearance to the first at-home molecular test, a nasal self-swab kit (Pixel, LabCorp, USA), with a mail-back to the company laboratory for conducting the PCR assay, with online access to the results (10).

Although not currently available, the ideal test for the SAI tribal settings is low cost, less complex, point of care, rapid (i.e., test turn-around time preferably within an hour), and able to be performed by non-laboratory professionals in low-infrastructure settings, such as homes. The test results could be potentially uploaded to a mobile app or be viewed over a telemedicine consultation to interpret the results and provide immediate counseling on the next step. Smartphone-based devices containing a cartridge-housed microfluidic chip, which carries out isothermal amplification of viral nucleic acids from nasal swab samples in 30 minutes, which are detected using the smartphone camera, may soon be available for home testing (11). Rapid point of care serologic tests, similar to finger-stick blood glucose tests, and home pregnancy tests with colorimetric reading, mal also soon become available for home testing (12).To take advantage of rapid point-of-care testing that will soon become available, improving access to smartphones and broadband Internet in SAI tribal communities is crucial.

The primary goal of the pandemic containment in the rural SAI tribal communities is to reduce the basic reproductive number (R0, the expected number of cases directly generated by one case) of the SARS–CoV-2 virus, thereby reducing disease transmission. Given the lack of effective vaccines or treatments, the only currently available levers to reduce SARS–CoV-2 transmission are to practice social isolation, universal masking, and hand hygiene, identify asymptomatic and symptomatic infected cases through ideal testing strategies, and isolate contagious persons (8). Although not currently available, the ideal test for SAI communities is point of care, rapid, and home-based and requires efforts to improve access to smartphones and broadband Internet. Testing can be popularized using community leaders and traditional indigenous care providers. Finally, policy solutions are needed to eliminate financial barriers for uninsured or underinsured patients, to help meet the goal of improving testing-based COVID-19 surveillance in the rural SAI tribal communities.

References

  1. Kakol M, Upson D, Sood A. Susceptibility of southwestern american Indian tribes to coronavirus disease 2019 (COVID-19). J Rural Health. 2020. [CrossRef] [PubMed]
  2. Faulders K, Rubin O. New Mexico's governor warns tribal nations could be 'wiped out' by coronavirus, https://abcnews.go.com/Politics/mexicos-governor-warns-tribal-nations-wiped-coronavirus, published March 30, 2020,  accessed on April 3, 2020: ABC news (online); 2020.
  3. Gudbjartsson DF, Helgason A, Jonsson H, Magnusson OT, Melsted P, Norddahl GL, et al. Spread of SARS-CoV-2 in the Icelandic population. N Engl J Med. 2020 Apr 14.  [Epub ahead of print] [CrossRef] [PubMed]
  4. Souch JM, Cossman JS. A commentary on rural-urban disparities in covid-19 testing rates per 100,000 and risk factors. J Rural Health. 2020 Apr 13. [Epub ahead of print] [CrossRef] [PubMed]
  5. Monnat SM. Why coronavirus could hit rural areas harder. Available at https://lernercenter.syr.edu/2020/03/24/why-coronavirus-could-hit-rural-areas-harder/.  Printed March 24, 2020. Accessed March 26, 2020. Learner Center for Health Promotion.
  6. Xpert®Xpress SARS-CoV-2. Available online: https://www.cepheid.com/coronavirus. March 21,2020. (accessed on 2 April 2020).
  7. Abbott Launches Molecular Point-of-Care Test to Detect Novel Coronavirus in as Little as Five Minutes. Available online: https://abbott.mediaroom.com/2020-03-27-Abbott-Launches-Molecular-Point-of-Care-Test-to-Detect-Novel-Coronavirus-in-as-Little-as-Five-Minutes.  March 27, 2020. (accessed on 2 April 2020)
  8. Cheng MP, Papenburg J, Desjardins M, Kanjilal S, Quach C, Libman M, et al. Diagnostic testing for severe acute respiratory syndrome-related coronavirus-2: a narrative review. Ann Intern Med. 2020 Apr 13. [Epub ahead of print] [CrossRef] [PubMed]
  9. To KK, Tsang OT, Leung WS, Tam AR, Wu TC, Lung DC, et al. Temporal profiles of viral load in posterior oropharyngeal saliva samples and serum antibody responses during infection by SARS-CoV-2: an observational cohort study. Lancet Infect Dis. 2020 May;20(5):565-74. [CrossRef] [PubMed]
  10. LabCorp. Pixel by LabCorp, COVID-19 At-Home Kits. Available at https://www.pixel.labcorp.com/covid-19. Accessed April 23, 2020.
  11. Sun F, Ganguli A, Nguyen J, Brisbin R, Shanmugam K, Hirschberg DL, et al. Smartphone-based multiplex 30-minute nucleic acid test of live virus from nasal swab extract. Lab Chip. 2020 May 5;20(9):1621-7. [CrossRef] [PubMed]
  12. Vashist SK. In vitro diagnostic assays for covid-19: recent advances and emerging trends. Diagnostics (Basel). 2020 Apr 5;10(4). pii: E202. [CrossRef] [PubMed]

Cite as: Chhabra A, Sood V, Sood V, Sood A. Improving testing for COVID-19 for the rural Southwestern American Indian tribes. Southwest J Pulm Crit Care. 2020;20(5):175-8. doi: https://doi.org/10.13175/swjpcc037-20 PDF