Measurement of respiratory rate and timing using a nasal thermocouple

Abstract

Intermittent measurements of respiratory rate and timing using a nasal thermocouple accurately reflected measurements obtained from nasal airflow using a pneumotachograph.

The vexatious vital: Neither clinical measurements by nurses nor an electronic monitor provides accurate measurements of respiratory rate in triage

“…Respiratory rate is out of step with the other vital signs, which are measured electronically. There is a long list of proposed alternatives: capnography by mask, nasal prongs, or mouthpiece [30][31][32] ; pneumotachography (direct flow measurement) by mask or mouthpiece 33,34 ; acoustic monitoring by nasal microphones 30,35 ; nasal thermistors (temperature) 18,34,36 ; fiberoptic nasal sensors that gauge condensation during exhalation 30,37,38 ; inductive plethysmography, which measures chest wall and abdominal movement by bands encircling the trunk (extensometry) 26,33 ; single-compartment and multicompartment air mattresses that measure and compare chest and abdominal volumes [39][40][41] ; mask-mounted pyroelectric polymer strips, which detect temperature variations 32,42 ; transdermal fiberoptic photoplethysmography 30,43,44 ; and transthoracic impedance plethysmography. 13,18,26,30,32,37,[45][46][47] All of the above-mentioned modalities have been reported to correlate well with ''criterion standard'' clinical measurement of respiratory rate.…”

The clinical evaluation of the Respi-check mask: a new oxygen mask incorporating a breathing indicator

“…Methods included the Aberdeen University Respiratory Alarm (AURA) 13 using polyvinylidene film strips mounted inside a mask, an acoustic airflow sensor, 14 a rapid response hygrometer, 15 fibreoptic sensors 16 17 and a nasal thermocouple. 18 A number of these innovations are in use in clinical practice. The nasal thermocouples are used in sleep studies and fibreoptic sensors have been used to measure the respiratory rate in patients during magnetic resonance scanning, but none have found a place in routine monitoring on hospital wards or the A&E department.…”

Utilidad de la detección del aleteo nasal en la valoración de la gravedad de la disnea

“…Aunque se han hecho muchos esfuerzos, no se ha conseguido un sistema electrónico fiable, sencillo y barato para medir la FR de forma continua en pacientes con respiración espontánea [18][19][20][21][22][23] .…”