327 e-Letters

  • Extracorporeal CO2 removal (ECCO2R) in patients with stable COPD with chronic hypercapnia: applying the concept.

    Title: Extracorporeal CO2 removal (ECCO2R) in patients with stable COPD with chronic hypercapnia: applying the concept.
    Pradipta Bhakta, Antonio M. Esquinas, Brian O’Brien.
    1. Dr. Pradipta Bhakta (MD, MNAMS, FCAI, EDRA, EDIC)
    Department of Anaesthesia and Intensive Care,
    University Hospital Kerry, Tralee, Kerry, Ireland.
    Phone: 00353894137596.
    Email: bhaktadr@hotmail.com
    2. Dr. Antonio M. Esquinas (PhD, MD)
    Department of Intensive Care,
    Hospital Morales Meseguer,
    Murcia, Spain.
    Phone: 0034609321966
    Email: antmesquinas@gmail.com
    3. Dr. Brian O’Brien [FCARCSI, FJFICMI, FCICM (ANZ)]
    Consultant and Chair,
    Department of Anaesthesia and Intensive Care,
    Cork University Hospital, Cork, Ireland.
    Mobile: 00353877931656
    Email: drbobrien@hotmail.com
    Authors and their role:
    1. Dr. Pradipta Bhakta: Was involved analysis of the article, writing and editing the letter.
    2. Dr. Antonio M. Esquinas: Was involved analysis of the article, writing and editing the letter.
    3. Dr. Brian O’Brien: Was involved analysis of the article, writing and editing the letter.
    Corresponding Author: Dr. Pradipta Bhakta,

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  • Sneeze is unrealistic

    The sneeze is depicted as horizontal, presumably for the camera. In a real sneeze, the head first tends to first tilt back, but during the actual sneeze, tends to point downwards. This means that large droplets tend to move toward the floor. Would have been nice to see a P2/N95 mask. Apart from that, a useful paper.

  • When to test for alpha-1 antitryspin deficiency in patients with bronchiectasis

    Caretto et al’s brief communication[1] shines some additional light on an unresolved question of the role of alpha-1 antitrypsin deficiency (AATD) screening in patients with bronchiectasis. The authors conclude that testing of an unselected UK population (presumably with a primary diagnosis of bronchiectasis) identifies severe AATD in less than 1% of cases and that routine screening does not significantly impact on clinical management. Whilst these conclusions may be broadly applicable, it may be advisable to qualify the recommendation with some further detail to avoid potential misinterpretation and the consequent complete avoidance of AATD testing in patients with bronchiectasis.

    The study rationale originates from apparent conflicting recommendations of guidelines for bronchiectasis[2] and those for AATD[3]. It is stated by the authors that the latter advises AATD testing in all cases of bronchiectasis, whereas the guidelines (in recommendation 1c) in fact advocate testing in cases of ‘unexplained’ bronchiectasis. The use of the term ‘unexplained’ implies the use of a staged approach to the investigation of bronchiectasis with AATD testing reserved for a selected bronchiectasis population in which a diagnosis remains elusive despite clinically appropriate initial investigations.

    Studies of bronchiectasis in AATD are few in number and relatively small in size. Nevertheless, there is some consistency in the findings. In their conclusions from a study of t...

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  • Awake Prone Positioning in COVID-19 pneumonia: A useful strategy in patients not suitable for mechanical ventilation

    We read with interest the article by Koeckerling et al. (1) regarding ‘Awake Prone
    Positioning in COVID’. The authors have discussed the pros and cons of an
    intervention that is being widely used during the COVID-19 pandemic. Although
    we broadly agree with their assessment, there are some inaccuracies we would
    like to point out as well as a few issues where we would like to offer an
    alternative viewpoint:
    1. Koeckerling and colleagues (1) quote that 78% of patients with severe
    ARDS from a study by Ding et al (2) needed intubation. The original study
    was performed prior to COVID-19 pandemic and reported that 55% of
    patients with moderate to severe ARDS undergoing awake prone
    positioning in conjunction with high flow nasal oxygen (HFNO) /non-
    invasive ventilation (NIV) avoided intubation. All clinicians would agree that
    invasive mechanical ventilation should not be delayed in the face of a
    failing non-invasive intervention. The monitoring of the response to any
    treatment is key to determining the appropriate management plan.
    2. Koeckerling and colleagues report that CT scanning is essential to identify
    which patients would benefit from awake prone positioning but this may not
    be possible in view of the large numbers of patients. Gattinoni et al. do
    describe different phenotypes based on CT appearances, but this is to
    explain the pathophysiology of in different ph...

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  • Covid-19: in the footsteps of Ernest Shackleton. Asymptomatic passengers and crew

    Thank you for inviting us to respond to correspondence from Dr. Andrea Vila, entitled “Active searching for pseudo-asymptomatic contacts during outbreak, as containment measure”.

    We would like to establish in greater details what we defined as “asymptomatic” on board our cruise ship. For the first 8 days, prior to the development of fever in the first subject, our 2 ship’s physicians regularly checked for fever in all passengers in a common area, and attended to calls which were predominantly for sea sickness. After day 8, all passengers and crew were seen by one of the two ship’s physicians twice daily, and had body temperature checks. During these visits, symptoms were enquired about. This includes fever, sore throat, cough and myalgias. In mid-March, anosmia was a recognised symptom of Covid-19 infection and was thus included, but dysgeusia and ageusia were not, and thus Vila makes a valid point. However, given that all passengers and crew were seen twice daily between day 8 and day 28, we are confident in the accuracy of the data presented (81% of Covid-19 subjects being asymptomatic), with the above rider. We do not feel that language was a barrier in communication, with the overwhelming number of passengers and crew either having English as their native language, or being fluent in English. In addition one of the ship’s physicians was multilingual.

    Vila also accurately states that asymptomatic subjects may be pre-symptomatic. We have follow-up on all p...

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  • Active searching for ¨pseudo-asymptomatic¨ contacts during outbreak, as containment measure.

    Dear Editor,
    Ing and colleagues reported a cruise outbreak in which a high prevalence of asymptomatic SARS-coV-2 infection was noticed. Viral shedding can occur in the absence of symptoms and before symptom onset, and asymptomatic patients represent an epidemiological problem of great public health significance. However, it’s noteworthy that the huge number of asymptomatic patients (81%), contrasts with a high percentage of severe illness (9.4%) reported on the population of the cruise ship. So, there seems to be a gap between asymptomatic and severe cases of COVID-19, with just 9.6% of mild and moderate clinically disease.
    Cluster studies conducted in Singapore attributed 6.4% to asymptomatic transmission 1.
    Possibly great part of the population of asymptomatic cases, could have been symptomatic but not meeting the ¨case definition¨ at that time, or pre-symptomatic cases (probably the patients had no evaluation after arrival).
    Initial case definition has been periodically updated as more knowledge about COVID-19 was available 2, adding mild or atypical symptoms such as diarrhea, constitutional symptoms, sudden onset of anosmia, ageusia or dysgeusia. The latter were recognized in late March and published in April, thus scarcely known at the time of the report 3-5. As of June, it has been reported that up to 83% patients with mild illness develop anosmia (without nasal obstruction) or dysgeusia as an early or initial manifestation in the absence of o...

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  • Asthmatic children are less susceptible to Covid-19?

    Dear Editor,
    I read with interest Editorial by Wang et al. (1) regarding treatment of asthma in Covid-19 pandemic. It has been reported that allergic diseases, asthma, and chronic obstructive pulmonary disease were not risk factors for SARS-CoV-2 infection as shown in an earlier report from China (2). On the other hand, early data from Centre for Disease Control and Prevention (CDC) in the US suggest a higher rate of asthma in patients hospitalized for severe Covid-19 illness (3). On this background, patients with severe and uncontrolled asthma have also been included to be at increased risk of developing more severe Covid-19 according to CDC (3). It is however unclear whether increased risk is also relevant to the paediatric age group.
    I agree with the authors that asthma control on a population scale may have improved due to reduced pollution, the use of face masks, better medication adherence and reduced smoking. However, these factors are of lesser importance in the paediatric age group. There is variability in the use of facial masks in different countries. It is most probably that lesser severe illness of Covid-19 in children due to the disease (asthma and respiratory allergy) itself that is offering some kind of protection. That protection seems to more than that being offered by adherence to medical treatment alone. Results from a recent cohort study indicate that children with asthma and allergies have reduced angiotensin-converting enzyme-2 (ACE2) gen...

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  • A call for observational data collaboration for sites following Intensive Care Society guidelines for awake prone positioning in COVID-19

    Dear Editor,
    We agree with Koeckerling et al. that awake prone positioning, if proven beneficial, could provide a simple resource-conserving intervention that improves outcomes in COVID-19, especially in the resource-limited countries where even with mitigation strategies critical care bed demand is modelled to outstrip supply by a factor of 25.1,2

    Currently, our knowledge about prone positioning is extrapolated from studies in non-awake, mechanically ventilated patients and so these proposed benefits remain theoretical.3-6
    In addition to the various small-scale observational studies mentioned by Koeckerling et al., a recently published observational study of 24 awake COVID-19 patients concluded that awake prone positioning was well tolerated. However, the numbers were too small to confirm or refute any benefit in this population.7 Randomised control trial (RCT) is the gold standard for evidence in awake prone positioning in COVID-19 population. However, RCT will be a very difficult approach for this intervention due to the likelihood of a lack of equipoise amongst clinicians to recruit. Following national guidelines, many departments would implement this intervention as the standard of care. Awake prone positioning also appears to be a safe intervention in awake patients and may slow the respiratory deterioration in selected patients with COVID-19.1

    Following the recent Intensive Care Society (ICS) guideline, clinicians within our institution ha...

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  • Pulmonary tele-rehabilitation in the COVID-19 era.

    For patients with chronic obstructive pulmonary disease, pulmonary rehabilitation (PR) has demonstrated improvements in physiological measures(1), patient-reported outcomes(2), and health economic indices(3). There is also a growing body of evidence around improvements in frailty(4) sedentary behaviour(5) and social-connectedness(6). The clinical need for alternative delivery modes of programmes, such as pulmonary tele-rehabilitation (PTR) has been clearly established in the COVID-19 pandemic, whereby conventional face-to-face programme provision seems an unlikely reality for the foreseeable future. The rapid remodelling of health services as a result of COVID-19 provides an exciting opportunity to reflect about the traditional aims, structure, outcomes and components of conventional PR programmes. Hansen et al(7) in a recent issue of Thorax provide an excellent, concise literature review, in combination with outcomes from their study, which suggest that PTR is certainly no worse than conventional PR for commonly reported patient outcomes and could indeed offer some benefits in terms of programme completion. However, there are limitations which we believe should be highlighted further.

    Hansen et al(7) recruited patients who fulfilled the ‘real world’ inclusion criteria for hospital-based PR. The authors suggest that this may explain why neither study group achieved minimal clinically important difference (MCID) in outcomes. However, patients with similar functiona...

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  • The Yentl syndrome effect on Idiopathic pulmonary fibrosis

    “The Yentl Syndrome” coined in 1991 by Bernadine Healy is the different course of action that the treating physicians usually follow for women than for men (1,2). The name is taken from the 1983 film Yentl starring Barbra Streisand in which her character plays the role of a male in order to attend school and study the Talmud. Being "just like a man" has historically been a price women have had to pay for equality. Throughout the centuries women, considered different and second-class from men, have too often been treated less than equally in various aspects of life, including education and health care (2). Bernadine Healy (1) pointed out in an editorial for the two studies (3,4) published in the same journal demonstrating that women who are hospitalized for coronary heart disease undergo fewer major diagnostic and therapeutic procedures than men as physicians pursue a less aggressive management approach in women than in men, despite greater cardiac disability in women.
    Later, two studies (5,6) demonstrate under-treatment of women with medication, including lower rates of aspirin and ACE inhibitor use in stable women compared with men, as well lower rates of ACE inhibitor, beta-blocker and statin medication in acute coronary syndrome women compared with men. Both studies also show gender differences in use of procedures, where stable women undergo more repeat angiography, whereas acute coronary syndrome women undergo fewer angiograms, percutaneous coronary in...

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