Role of proning and positive end-expiratory pressure in COVID-19

CPAP vs HFNC in treatment of patients with COVID-19 ARDS: A retrospective propensity-matched study

Background

Previous studies exploring the application of noninvasive ventilation or high-flow nasal cannula in patients with COVID-19-related acute respiratory distress syndrome (ARDS) have yielded conflicting results on whether any method of respiratory support is superior. Our aim is to compare the efficacy and safety of respiratory therapy with high-flow nasal cannula and noninvasive ventilation with continuous positive airway pressure in treatment of COVID-19-related ARDS.

Methods

This is a retrospective cohort study based on data from patients who received respiratory support as part of their treatment in the COVID intensive care unit at the University Hospital Centre Zagreb between February 2021 and February 2023. Using propensity score analysis, 42 patients treated with high-flow nasal cannula (HFNC group) were compared to 42 patients treated with noninvasive ventilation with continuous positive airway pressure (CPAP group). Primary outcome was intubation rate.

Results

Intubation rate was 71.4% (30/42) in the HFNC group and 40.5% (17/42) in the CPAP group (p = 0.004). Hazard ratio for intubation was 3.676 (95% confidence interval [CI] 1.480 to 9.232) with the HFNC versus CPAP group. Marginally significant difference in survival between the two groups was observed at 30 days (p = 0.050) but was statistically significant at 60 days (p = 0.043).

Conclusions

Respiratory support with high-flow nasal cannula and noninvasive ventilation with continuous positive airway pressure yielded significantly different intubation rates in favour of continuous positive airway pressure. The same patients also had better 30-day and 60-day survival post-admission.

Efficacy and Safety of High PEEP NIV in COVID-19 Patients

OBJECTIVE

To investigate the efficacy and safety of non-invasive ventilation (NIV) with high PEEP levels application in patients with COVID-19-related acute respiratory distress syndrome (ARDS).

METHODS

This is a retrospective cohort study with data collected from 95 patients who were administered NIV as part of their treatment in the COVID-19 intensive care unit (ICU) at University Hospital Centre Zagreb between October 2021 and February 2022. The definite outcome was NIV failure.

RESULTS

High PEEP NIV was applied in all 95 patients; 54 (56.84%) patients could be kept solely on NIV, while 41 (43.16%) patients required intubation. ICU mortality of patients solely on NIV was 3.70%, while total ICU mortality was 35.79%. The most significant difference in the dynamic of respiratory parameters between 2 patient groups was visible on Day 3 of ICU stay: By that day, patients kept solely on NIV required significantly lower PEEP levels and had better improvement in PaO2, P/F ratio, and HACOR score.

CONCLUSION

High PEEP applied by NIV was a safe option for the initial respiratory treatment of all patients, despite the severity of ARDS. For some patients, it was also shown to be the only necessary form of oxygen supplementation.

Association of Parsonage-Turner syndrome with COVID-19 infection and vaccination: a systematic review

OBJECTIVES

The exact etiology of Parsonage-Turner syndrome is unknown, but it is known to be preceded by infection, vaccination, or surgical intervention. In this review, we describe associations of Parsonage-Turner syndrome with COVID-19 infection and vaccination.

METHODS

A systematic literature search was conducted using PubMed/MEDLINE, ScienceDirect, and Google Scholar. Microsoft Excel was used for data extraction and statistical analysis. The quality of case reports and case series was assessed using the Joanna Briggs Institute Critical Appraisal Tool.

RESULTS

We selected 44 case reports and 10 case series, including 68 patients (32 post-vaccination and 36 with post-COVID-19 infection Parsonage-Turner syndrome). Middle-aged males were predominantly affected in both groups. The most frequently administered vaccine was Comirnaty (Pfizer) (53%). The mean latency was 11.7 days in the post-vaccination group and 20.3 days in the post-infection group. The most affected nerves in both groups were the axillary, suprascapular, and musculocutaneous nerves; and 78.1% and 38.9% of patients showed partial amelioration of their symptoms in the post-vaccination and post-infection groups, respectively.

CONCLUSION

Post-vaccination Parsonage-Turner syndrome presents earlier than post-infection disease. Pain and sensorimotor deficits of the upper limb are common in both situations. Complete or partial recovery occurs in most cases.