Negative pressure face shield for flexible laryngoscopy in the COVID‐19 era

Laryngoscope Investigative Otolaryngology

Daniel J. Diekema¹  Helen R. Stegall²  Henry T. Hoffman²  Jarrett E. Walsh²  Robert M. Miller³ 

[1] Department of Internal Medicine—Division of Infectious Diseases University of Iowa Hospitals and Clinics Iowa City Iowa USA;Department of Otolaryngology University of Iowa Hospitals and Clinics Iowa City Iowa USA;Engineering Services University of Iowa Hospitals and Clinics Iowa City Iowa USA;

关键词: COVID‐19;    diagnostic flexible;    laryngoscopy;    laryngoscopyaerosol generating procedure;   

DOI  :  10.1002/lio2.437

来源: DOAJ

【 摘 要 】

Abstract Objective Introduce novel methods and materials to limit microdroplet spread when performing transnasal aerosol generating procedures in the COVID‐19 era. Methods Prototypes of a negative pressure face shield (NPFS) were tested then used clinically to create a suction‐clearing negative pressure microenvironment with controlled access to the nose and mouth. Air pressure measurements within prototypes were followed by prospective evaluation of 30 consecutive patients treated with the device assessed through questionnaires and monitoring oximetry. Results The NPFS is a transparent acrylic barrier with two anterior instrumentation ports and a side port to which continuous suction is applied. It is positioned on a stand and employs a disposable antimicrobial wrap to secure an enclosure around the head. This assembly was successfully used to complete transnasal laryngoscopy in all 30 patients studied. Tolerance of the design was excellent, with postprocedure questionnaire identifying no shortness of breath (27/30), no claustrophobia (27/30), no pain (29/30), and no significant changes in pulse oximetry. Conclusion Diagnostic laryngoscopy was successfully performed in a negative pressure microenvironment created to limit dispersion of aerosols. Further application of the NPFS device is targeted for use with transnasal laryngeal laser and biopsy procedures to be followed by additional modification to enable intranasal and intraoral procedures in a similar protected environment. Level of Evidence Level 2b (Cohort Study).

【 授权许可】

Unknown