Airway Management in the Operating Room and Interventional Suites in Known or Suspected COVID-19 Adult Patients: A Practical Review

Transitioning from Direct to Video Laryngoscopy during the COVID-19 Pandemic Was Associated with a Higher Endotracheal Intubation Success Rate

OBJECTIVE

The objective of this study was to determine the effect of transitioning from direct laryngoscopy (DL) to video laryngoscopy (VL) on endotracheal intubation success overall and with enhanced precautions implemented during the COVID-19 pandemic.

METHODS

We examined electronic transport records from Mayo Clinic Ambulance Service, a large advanced life support (ALS) provider serving rural, suburban, and urban areas in Minnesota and Wisconsin, USA. We determined the success of intubation attempts when using DL (March 10, 2018 to December 19, 2019), VL (December 20, 2019 to September 29, 2021), and VL with an enhanced COVID-19 guideline that restricted intubation to one attempt, performed by the most experienced clinician, who wore enhanced personal protective equipment (April 1 to December 18, 2020). Success rates at first attempt and after any attempt were assessed for association with type of laryngoscopy (VL vs DL) after adjusting for patient age group, patient weight, use of enhanced COVID-19 guideline, medical vs trauma patient, and ALS vs critical care clinician. A secondary analysis further adjusted for degree of glottic visualization.

RESULTS

We identified 895 intubation attempts using DL and 893 intubation attempts using VL, which included 382 VL intubation attempts using the enhanced COVID-19 guideline. Success on first intubation attempt was 69.2% for encounters with DL, 82.9% overall with VL, and 83.2% with VL and enhanced COVID-19 protocols (DL vs overall VL: p < 0.001; COVID-19 vs non-COVID VL: p = 0.86). In multivariable analysis, use of VL was associate with higher odds of successful intubation on first attempt (odds ratio, 2.28; 95%CI, 1.73-3.01; p < 0.001) and on any attempt (odds ratio, 2.16; 95%CI, 1.58-2.96; p < 0.001) compared with DL. Inclusion of glottic visualization in the model resulted in a nonsignificant association between laryngoscopy type and successful first intubation (p = 0.41) and a significant association with the degree of glottic visualization (p < 0.001).

CONCLUSIONS

VL is designed to improve glottic visualization. The use of VL by a large, U.S. multistate ALS ambulance service was associated with increased odds of successful first-pass and overall attempted intubation, which was mediated by better visualization of the glottis. COVID-19 protocols were not associated with success rates.

Management for A Depressive Patient with Femoral Neck Fracture by Electroconvulsive Therapy during COVID-19 Pandemic: A Case Report and Literature Review

Electroconvulsive therapy (ECT) is an effective treatment for refractory major depressive disorder with suicidal ideation. The most common adverse medical events are transient retrograde amnesia, falls and pneumonia. Hip fractures, associated with high-energy trauma by convulsions, were occasionally reported in western countries, in the period before the COVID-19 pandemic. Strict COVID-19 regulations influenced the course and further investigation of the treatment of post-ECT complications. A 33-year-old man, previously diagnosed with major depressive disorder, had a history of nine successful sessions of ECT treatment for depression five years ago. He was hospitalized again for 12 sessions of ECT for recurrent depression. Unfortunately, an ECT-induced right hip-neck fracture was noted after the ninth session of ECT, in March 2021. After receiving close reduction and internal fixation of the right femoral neck fracture, with three screws, his original daily function was restored. His treatment was regularly followed up at the outpatient clinic for 20 months; he achieved partial remission with three combined antidepressants. This case of ECT-induced right hip-neck fracture informed psychiatric staff to be aware of this rare adverse complication and ensure its appropriate management, especially during the COVID-19 pandemic.

Intervention effect of encouraging mental and programmed nursing of patients in interventional operating room on their compliance and bad moods

BACKGROUND

Patients’ lack of correct understanding of cardiovascular disease and interventional therapy is often accompanied by varying degrees of fear, depression and anxiety. Negative emotion will affect the hemodynamic fluctuation of patients undergoing interventional surgery, which is not conducive to the smooth and safe operation of interventional surgery. Therefore, it is very important to implement effective nursing intervention in the operating room.

AIM

To explore the intervention effect of motivational psychological nursing combined with programmed nursing on compliance and bad mood of patients in interventional operating room.

METHODS

A total of 98 patients in the interventional operating room of our hospital from October 2019 to March 2021 were randomly divided into study group (n = 49) and control group (n = 49). The control group took routine nursing. However, the study group took motivational psychological nursing combined with procedural nursing on the basis of the control group. Statistics were made on rehabilitation compliance, Positive and Negative Affect Schedule of bad mood, Simplified Coping Styles Questionnaire score of coping style and satisfaction of intervention between the two groups before and after intervention.

RESULTS

The rehabilitation compliance of the study group (95.92%) was higher than that of the control group (81.63%) (P < 0.05). After intervention, the scores of upset, fear, irritability, tension and fear in the study group were respectively, which were lower than those in the control group (P < 0.05). After intervention, the score of positive coping in the study group was higher than that in the control group. However, the score of negative coping in the study group was lower than that in the control group (P < 0.05). The intervention satisfaction of the study group (93.88%) was higher than that of the control group (79.59%) (P < 0.05).

CONCLUSION

The intervention of motivational psychological nursing combined with procedural nursing can improve the rehabilitation compliance, and alleviate the bad mood. In addition, it can change their coping style to the disease, and the patients are more satisfied with the nursing work.

Human Factors and Airway Management in COVID-19 Patients: The Perfect Storm?

The SARS-CoV-2 pandemic heavily impacted healthcare workers, increasing their physical and psychological workload. Specifically, COVID-19 patients' airway management is definitely a challenging task regarding both severe and acute respiratory failure and the risk of contagion while performing aerosol-generating procedures. The category of anesthesiologists and intensivists, the main actors of airway management, showed a poor psychological well-being and a high stress and burnout risk. Identifying and better defining the specific main SARS-CoV-2-related stressors can help them deal with and effectively plan a strategy to manage these patients in a more confident and safer way. In this review, we therefore try to analyze the relevance of human factors and non-technical skills when approaching COVID-19 patients. Lessons from the past, such as National Audit Project 4 recommendations, have taught us that safe airway management should be based on preoperative assessment, the planning of an adequate strategy, the optimization of setting and resources and the rigorous evaluation of the scenario. Despite, or thanks to, the critical issues and difficulties, the "take home lesson" that we can translate from SARS-CoV-2 to every airway management is that there can be no more room for improvisation and that creating teamwork must become a priority.

Aerosol boxes for airway management in coronavirus disease patients: a clinical retrospective study in Mexico

INTRODUCTION

Significant concerns raise for the healthcare workers involved in airway management of patients diagnosed with coronavirus 2019 disease (COVID-19). Due to shortages of personal protective equipment (PPE), barrier enclosure systems such as aerosol box (AB) have been proposed worldwide. The aim of this study was to evaluate our experience using AB as protective equipment in patients with COVID-19 in a third-level center in Mexico.

METHODS

A retrospective study of COVID-19 patients requiring airway management using an AB in the Hospital Central Sur de Alta Especialidad de Pemex in Mexico City from March 1 to June 1, 2020. Antropometric data, pre-intubation vital signs, and laboratory tests were recorded; the primary endpoints were intubation success rate and complications associated with AB and patients' mortality. As a secondary endpoint, AB subjective evaluation was explored by administering a survey after airway management procedures.

RESULTS

Thirty-nine patients for a total of 40 intubations were documented. Thirty-one (77.5%) were men, with a mean age of 61.65 years; successful intubation occurred in 39 (97.55%) of the procedures, and AB was used in 36 (90%) of intubations, with success in 28 (70.0%); A Cormack-Lehane grade 3 view was recorded in 18 patients (46.2%), and during the procedure, the AB had to be removed in 8 (22.2%) cases, with migration documented in 91.6% of cases. The 30-day mortality was 48.71%, with 23.0% of patients discharged. 83.3% of surveyed anesthesiologists reported significant limitations in manipulating airway devices with AB used.

CONCLUSION

Our data indicate that in clinical practice, the use of AB may hinder airway management and decrease the intubation success rate and may also result in patients' injury. Further studies are necessary to validate the use of AB in clinical practice, and they should not replace certified PPE.

Airway recommendations for perioperative patients during the COVID-19 pandemic: a scoping review

PURPOSE

Numerous guideline recommendations for airway and perioperative management during the COVID-19 pandemic have been published. We identified, synthesized, and compared guidelines intended for anesthesiologists.

SOURCE

Member society websites of the World Federation of Societies of Anesthesiologists and the European Society of Anesthesiologists were searched. Recommendations that focused on perioperative airway management of patients with proven or potential COVID-19 were included. Accelerated screening was used; data were extracted by one reviewer and verified by a second. Data were organized into themes based on perioperative phase of care.

PRINCIPAL FINDINGS

Thirty unique sets of recommendations were identified. None reported methods for systematically searching or selecting evidence to be included. Four were updated following initial publication. For induction and airway management, most recommended minimizing personnel and having the most experienced anesthesiologist perform tracheal intubation. Significant congruence was observed among recommendations that discussed personal protective equipment. Of those that discussed tracheal intubation methods, most (96%) recommended videolaryngoscopy, while discordance existed regarding use of flexible bronchoscopy. Intraoperatively, 23% suggested specific anesthesia techniques and most (63%) recommended a specific operating room for patients with COVID-19. Postoperatively, a minority discussed extubation procedures (33%), or care in the recovery room (40%). Non-technical considerations were discussed in 27% and psychological support for healthcare providers in 10%.

CONCLUSION

Recommendations for perioperative airway management of patients with COVID-19 overlap to a large extent but also show significant differences. Given the paucity of data early in the pandemic, it is not surprising that identified publications largely reflected expert opinion rather than empirical evidence. We suggest future efforts should promote coordinated responses and provide suggestions for studying and establishing best practices in perioperative patients.

STUDY REGISTRATION

Open Science Framework ( https://osf.io/a2k4u/ ); date created, 26 March 2020.

Effects of wearing surgical masks on fraction of inspired oxygen in spontaneously breathing patients: improving safety for frontline healthcare professionals under pandemic situations

BACKGROUND

During pandemic situations, many guidelines recommend that surgical masks be worn by both healthcare professionals and infected patients in healthcare settings. The purpose of this study was to clarify the levels and changes of oxygen concentration over time while oxygen was administered over a surgical mask.

METHODS

Patients scheduled to undergo general anesthesia (n = 99) were enrolled in this study. First, patients were administered oxygen at 6 L/min via an oxygen mask over a surgical mask for 5 min. The patients removed the surgical mask and then took a 3-min break; thereafter, the same amount of oxygen was administered for another 5 min via the oxygen mask. We measured the fraction of inspired oxygen (FiO₂), the end-tidal CO₂ (EtCO₂), and respiratory frequency every minute for 5 min, both while administering oxygen with and without a surgical mask. The FiO₂ was measured at the beginning of inspiration and the EtCO₂ was measured at the end of expiration.

RESULTS

The FiO₂ at 5 min was significantly lower when breathing with a surgical mask than that without it (mean difference: 0.08 [95% CI: 0.067-0.10]; p <  0.001). In contrast, the EtCO₂ at 5 min was significantly higher when breathing with a surgical mask than that without it (mean difference: 11.9 mmHg [95% CI: 10.9-12.9]; p <  0.001).

CONCLUSION

The FiO₂ was lower when oxygen was administered over surgical masks than when patients did not wear surgical masks. Oxygen flow may need to be adjusted in moderately ill patients requiring oxygen administration.

The application of a surgical face mask over different oxygen delivery devices; a crossover study of measured end-tidal oxygen concentrations

BACKGROUND

The application of a surgical face mask over oxygen delivery devices is now a widespread recommendation in the setting of the Coronavirus disease pandemic. This addition is designed to reduce droplet spread, but this also changes the nature of these devices, and may alter the amount of oxygen delivered to a patient. This research investigated how placing a surgical face mask over both a simple plastic mask ("Hudson mask") and nasal cannula altered the concentration of available oxygen measured at the nares.

METHODS

We measured the inspired and end-tidal oxygen concentrations of five healthy non-smoking volunteers. Oxygen was delivered via nasal cannula and also a simple plastic face mask, at flow rates of 2, 4, 6 and 8 l per minute, with and without an overlying surgical face mask.

RESULTS

Adding a surgical mask over nasal cannula caused an appreciable rise in the end-tidal oxygen concentrations at all the measured oxygen flow rates 2, 4, 6, 8 L/minute. With the Hudson mask, there was a rise in oxygen concentration at 4 and 6 L/minute. For example, at a flow rate of 4 l/min via nasal cannula, available oxygen concentration increased from 24 to 36%, and via the Hudson mask the concentration rose from 27 to 38%.

CONCLUSIONS

The addition of a surgical face mask over both nasal cannula and a Hudson mask resulted in an increased available oxygen concentration. This may be valuable where more advanced oxygen devices are not available, or alternatively providing adequate supplemental oxygen at lower flow rates and thus making critical savings in oxygen usage.

Surgical oncology operative experience at a high-volume safety-net hospital during the COVID-19 pandemic

BACKGROUND

The coronavirus (COVID-19) pandemic led to disruptions in operative and hospital capabilities as the country triaged resources and canceled elective procedures. This study details the operative experience of a safety-net hospital for cancer-related operations during a 3-month period at the height of the pandemic.

METHODS

Patients operated on for or diagnosed with malignancies of the abdomen, breast, skin, or soft-tissue (September 3, 2020-September 6, 2020) were identified from operative/clinic schedules. Sociodemographics, tumor and treatment characteristics, and COVID-19 information was identified through retrospective chart review of a prospectively maintained database. Descriptive statistics were calculated.

RESULTS

Fifty patients evaluated within this window underwent oncologic surgery. Median age was 61 (interquartile range: 53-68), 56% were female, 86% were White, and 66% were Hispanic. The majority (28%) were for colon cancer. Only two patients tested positive for COVID-19 preoperatively or within 30 days of their operation. There were no mortalities during the 1-year study period.

CONCLUSION

During the COVID-19 pandemic, many hospitals and operative centers limited interventions to preserve resources, but oncologic procedures continued at many large-volume academic cancer centers. This study underscores the importance of continuing to offer surgery during the pandemic for surgical oncology cases at safety-net hospitals to minimize delays in time-sensitive oncologic treatment.

Electroconvulsive therapy services during COVID-19 pandemic

The COVID-19 pandemic has hit the electroconvulsive therapy (ECT) services hard worldwide as it is considered an elective procedure and hence has been given less importance. Other reasons include the risk of transmission of infections, lack of resources, and the scarcity of anesthesiologists due to their diversion to intensive care units to manage COVID-19 patients. However, ECT is an urgent and life-saving measure for patients diagnosed with depression and other severe mental illnesses who have suicidality, catatonia, or require a rapid therapeutic response. COVID-19 pandemic is a significant source of stress for individuals due to its impact on health, employment, and social support resulting in new-onset psychiatric illnesses and the worsening of a pre-existing disorder. Hence, a continuation of the ECT services during the COVID-19 pandemic is of paramount importance. In this narrative review, the authors from India have compiled the literature on the ECT practice during the COVID-19 pandemic related to the screening and testing protocol, necessity of personal protective equipment, modification in ECT Suite, electrical stmulus settings, and anesthesia technique modification. The authors have also shared their experiences with the ECT services provided at their institute during this pandemic. This description will help other institutes to manage the ECT services uninterruptedly and make ECT a safe procedure during the current pandemic.

The monthly operating cost of an institutional COVID-19 airway response team: A financial model and sensitivity analysis based on experience at an academic medical center

Background

Coronavirus disease 2019 (COVID-19) airway response teams concentrate equipment and expertise while minimizing the number of providers exposed to aerosol generating procedures. These airway teams were implemented in various hospitals around the world to respond to the acute increase of critical ill patients requiring ventilatory support. We created a financial model to estimate the costs for staffing and maintaining a dedicated COVID-19 airway response team based on the experience at an urban academic hospital in the Northeastern United States between March and June of 2020.

Methods

The institutional review board at Brigham and Women's Hospital approved this protocol and the requirement for informed consent was waived. The average reimbursement for 125 COVID-19 airway consultations was measured. Our team estimated the costs of consumable items for each airway based on previously published recommendations for equipment and personal protective equipment. A sensitivity analyses was performed for variable numbers of monthly airway consults and different staffing patterns based on a literature review of available COVID-19 airway team structures.

Results

Based on the average reimbursements and estimates of the consumable costs, each airway procedure represented a net loss of $34 to the institution. The overall estimated cost of staffing a dedicated airway team was between $109,472 and $204,575 per month.

Conclusions

Development and implementation of a dedicated COVID-19 airway response teams represents a significant institutional expense. Institutions should establish necessary cost sharing, consider volume and team structure, and identify reimbursement opportunities that mitigate the necessary expense associated with airway response programs.

Difficult Airway Management in Adult COVID-19 Patients: Statement by the Society of Airway Management

The COVID-19 disease, caused by Coronavirus SARS-CoV-2, often results in severe hypoxemia requiring airway management. Because SARS CoV-2 virus is spread via respiratory droplets, bag-mask ventilation, intubation, and extubation may place health care workers (HCW) at risk. While existing recommendations address airway management in patients with COVID-19, no guidance exists specifically for difficult airway management. Some strategies normally recommended for difficult airway management may not be ideal in the setting of COVID-19 infection. To address this issue the Society for Airway Management (SAM) created a task force to review existing literature and current Practice Guidelines for management of the difficult airway by the American Society of Anesthesiologists Task Force on Management of the Difficult Airway. SAM task force created recommendations for management of known or suspected difficult airway in the setting of known or suspected COVID-19 infection. The goal of the task force was to optimize successful airway management while minimizing exposure risk. Each member conducted a literature review on specific clinical practice section utilizing standard search engines (PubMed, Ovid, Google Scholar). Existing recommendations and evidence for difficult airway management in COVID-19 context were developed. Each specific recommendation was discussed among task force members and modified until unanimously approved by all task force members. Elements of AGREE Reporting Checklist for dissemination of clinical practice guidelines were utilized to develop this statement. Airway management in the COVID-19 patient increases HCW exposure risk. and difficult airway management often takes longer, may involve multiple procedures with aerosolization potential, strict adherence to personal protective equipment (PPE) protocols is mandatory to reduce risk to providers. When patient's airway risk assessment suggests awake tracheal intubation is an appropriate choice of technique, procedures that may cause increased aerosolization of secretions should be avoided. Optimal preoxygenation before induction with tight seal facemask may be performed to reduce risk of hypoxemia. Unless the patient is experiencing oxygen desaturation, positive pressure bag-mask ventilation after induction may be avoided to reduce aerosolization. For optimal intubating conditions, patients should be anesthetized with full muscle relaxation. Videolaryngoscopy is recommended as first-line strategy for airway management. If emergent invasive airway access is indicated, we recommend a surgical technique such as scalpel-bougie-tube, rather than an aerosolizing generating procedure, such as transtracheal jet ventilation. This statement represents recommendations by SAM task force for the difficult airway management of adults with COVID-19 with the goal to optimize successful airway management while minimizing the risk of clinician exposure.

Current Recommendations for Airway Management Techniques in COVID-19 Patients without Respiratory Failure Undergoing General Anaesthesia: A Nonsystematic Literature Review

Summary Background

Since severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) first emerged, many articles have been published on airway management for coronavirus disease 2019 (COVID-19) patients. However, there is a lack of clear and concise conceptual framework for working with infected patients without respiratory failure undergoing general anaesthesia compared to noninfected patients. The aim of this article is to review current literature data on new challenges for anaesthesia providers, compare standard airway management techniques protocols with new data, and discuss optimisation potential.

Materials and methods

Literature search was performed in Google Scholar and PubMed databases using these keywords and their combinations: anaesthesia, preoxygenation, airway management, difficult airway, SARS-CoV-2, COVID-19. The following nonsystematic review is based on a comprehensive literature search of available data, wherein 41 articles were chosen for detailed analysis. Summarised and analysed data are presented in the article.

Results

SARS-CoV-2 has unique implications for airway management techniques in patients without respiratory failure undergoing general anesthesia. Main differences with the standard practice include: institutional preparedness, team composition principles, necessary skills, equipment, drugs, intubation and extubation strategies. Failed or difficult intubation is managed with predominance of emergency front of neck access (FONA) due to increased aerosol generation.

Conclusions

Airway management techniques in COVID-19 patients without respiratory failure are more challenging than in noninfected patients undergoing general anaesthesia. Safe, accurate and swift actions avoid unnecessary time delay ensuring the best care for patients, and reduce risk of contamination for staff. Appropriate airway strategy, communication, minimisation of time for aerosol generating procedures and ramped-up position aid to achieve these goals. During the pandemic, updated available literature data may change clinical practice as new evidence emerges.

Comparison of aerosol box intubation with C-MAC video laryngoscope and direct laryngoscopy-A randomised controlled trial

Background and Aims:

Severe acute respiratory syndrome corona virus 2 (SARS-CoV-2) is a highly infectious disease and healthcare workers are at constant risk for contracting it. Nowadays, aerosol box is used in conjunction with WHO-recommended safety kits, to avoid health workers from getting SARS-CoV-2 infection during aerosol-generating procedures. In our study, we compared the ease of oral intubation with C-MAC video laryngoscope and direct laryngoscopy, when the aerosol box was used. The secondary objectives were to compare the incidence of airway loss, haemodynamic changes, number of attempts, and time required for intubation between these two techniques.

Methods:

This prospective randomised controlled study was conducted on 60 non-coronavirus disease (COVID) patients presenting for elective surgery under general anaesthesia. Patients were randomly assigned into two groups:C and D using a computer-generated random sequence of numbers by closed envelope technique. In group D, laryngoscopy was performed with Macintosh blade and in group C, with Storz® C-MAC video laryngoscope.

Results:

The ease of intubation was better (grade 1) in group C than D (68.6% vs. 31.4% respectively) with a P value of < 0.001. 10% of patients required more than one intubation attempt in group D compared to none in group C, but this difference was not statistically significant. The intubation time was comparable between the two groups. There were no incidences of loss of airway or failure to intubate in both groups.

Conclusion:

The use of C-MAC video-laryngoscopy resulted in easier orotracheal intubation as compared to intubation with direct laryngoscopy when the aerosol box was used.