Commentary on Farnell S, Maxwell L, Tan, S, Rhodes A & Phillips A (2005) Temperature measurement: comparison of non-invasive methods used in adult critical care. Journal of Clinical Nursing 14, 632?639

2007 ◽  
Vol 16 (1) ◽  
pp. 217-219
Author(s):  
Edward Purssell
Keyword(s):  
Critical Care ◽  
Temperature Measurement ◽  
Non Invasive ◽  
Clinical Nursing

Temperature measurement: comparison of non-invasive methods used in adult critical care

2005 ◽  
Vol 14 (5) ◽  
pp. 632-639 ◽  
Author(s):  
Sarah Farnell ◽  
Lorraine Maxwell ◽  
Seok Tan ◽  
Andrew Rhodes ◽  
Barbara Philips
Keyword(s):  
Critical Care ◽  
Temperature Measurement ◽  
Non Invasive

scholarly journals Evaluating the Possibility of Translating Technological Advances in Non-Invasive Continuous Lactate Monitoring into Critical Care

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 879
Author(s):  
Robert D. Crapnell ◽  
Ascanio Tridente ◽  
Craig E. Banks ◽  
Nina C. Dempsey-Hibbert
Keyword(s):  
Critical Care ◽  
Continuous Monitoring ◽  
Performance Monitoring ◽  
Plasma Concentrations ◽  
Lactate Production ◽  
Anaerobic Exercise ◽  
Response To Treatment ◽  
Diverse Range ◽  
Non Invasive ◽  
Technological Advances

Lactate is widely measured in critically ill patients as a robust indicator of patient deterioration and response to treatment. Plasma concentrations represent a balance between lactate production and clearance. Analysis has typically been performed with the aim of detecting tissue hypoxia. However, there is a diverse range of processes unrelated to increased anaerobic metabolism that result in the accumulation of lactate, complicating clinical interpretation. Further, lactate levels can change rapidly over short spaces of time, and even subtle changes can reflect a profound change in the patient’s condition. Hence, there is a significant need for frequent lactate monitoring in critical care. Lactate monitoring is commonplace in sports performance monitoring, given the elevation of lactate during anaerobic exercise. The desire to continuously monitor lactate in athletes has led to the development of various technological approaches for non-invasive, continuous lactate measurements. This review aims firstly to reflect on the potential benefits of non-invasive continuous monitoring technology within the critical care setting. Secondly, we review the current devices used to measure lactate non-invasively outside of this setting and consider the challenges that must be overcome to allow for the translation of this technology into intensive care medicine. This review will be of interest to those developing continuous monitoring sensors, opening up a new field of research.

Non-invasive temperature measurement of turbulent flows of aqueous solutions and gases in pipes

2020 ◽  
Vol 87 (9) ◽  
pp. 553-563
Author(s):  
Jörg Gebhardt ◽  
Guruprasad Sosale ◽  
Subhashish Dasgupta
Keyword(s):  
Surface Temperature ◽  
Temperature Measurement ◽  
Turbulent Flows ◽  
Fluid Dynamic ◽  
Industrial Applications ◽  
Static Case ◽  
Pipe Surface ◽  
Non Invasive ◽  
Step Model ◽  
Plant Optimization

AbstractAccurate and responsive non-invasive temperature measurements are enablers for process monitoring and plant optimization use cases in the context of Industry 4.0. If their performance is proven for large classes of applications, such measurement principles can replace traditional invasive measurements. In this paper we describe a two-step model to estimate the process temperature from a pipe surface temperature measurement. This static case model is compared to and enhanced by computational fluid dynamic (CFD) calculations to predict transient situations. The predictions of the approach are validated by means of controlled experiments in a laboratory environment. The experimental results demonstrate the efficacy of the model, the responsiveness of the pipe surface temperature, and that state of the art industrial non-invasive sensors can achieve the performance of invasive thermowells. The non-invasive sensors are then used to demonstrate the performance of the model in industrial applications for cooling fluids and steam.

scholarly journals Critical Care for Severe COVID-19: A Population-based Study from a Province with Low Case-fatality Rate in China

2020 ◽  
Author(s):  
Xuelian Liao ◽  
Hong Chen ◽  
Bo Wang ◽  
Zhen Li ◽  
Zhongwei Zhang ◽  
...  
Keyword(s):  
Critical Care ◽  
Case Fatality ◽  
Population Based ◽  
Strategy Management ◽  
Respiratory Support ◽  
Non Invasive ◽  
Department Of Health ◽  
Non Invasive Ventilation ◽  
Registration Number ◽  
Using Data

ABSTRACTBackgroundData regarding critical care for patients with severe COVID-19 are limited. We aimed to describe the clinical course, multi-strategy management, and respiratory support usage for the severe COVID-19 at the provincial level.MethodsUsing data from Sichuan Provincial Department of Health and the multicentre cohort study, all microbiologically confirmed COVID-19 patients in Sichuan who met the national severe criteria were included and followed-up from the day of inclusion (D1), until discharge, death, or the end of the study.FindingsOut of 539 COVID-19 patients, 81 severe cases (15.0%) were identified. The median (IQR) age was 50 (39-65) years, 37% were female, and 53.1% had chronic comorbidities. All severe cases were identified before requiring mechanical ventilation and treated in the intensive care units (ICUs), among whom 51 (63.0%) were treated in provisional ICUs and 77 patients (95.1%) were admitted by D1. On D1, 76 (93.8%) were administered by respiratory support, including 55 (67.9%) by conventional oxygen therapy (COT), 8 (9.9%) by high-flow nasal cannula (HFNC) and 13 (16.0%) by non-invasive ventilation (NIV). By D28, 53 (65.4%) were discharged, three (3.7%) were deceased, and 25 (30.9%) were still hospitalized. COT, administered to 95.1% of the patients, was the most commonly used respiratory support and met 62.7% of the respiratory support needed, followed by HFNC (19.3%), NIV ventilation (9.4%) and IV 8.5%.InterpretationThe multi-strategy management for severe COVID-19 patients including early identification and timely critical care may contribute to the low case-fatailty. Preparation of sufficient conventional oxygen equipment should be prioritized.Trial registration numberChiCTR2000029758.

Emergency Nursing Resource: Non-Invasive Temperature Measurement in the Emergency Department

2012 ◽  
Vol 38 (6) ◽  
pp. 523-530 ◽  
Author(s):  
Susan Barnason ◽  
Jennifer Williams ◽  
Jean Proehl ◽  
Carla Brim ◽  
Melanie Crowley ◽  
...  
Keyword(s):  
Emergency Department ◽  
Temperature Measurement ◽  
Emergency Nursing ◽  
Non Invasive

Accuracy of infrared ear thermometry and other temperature methods in adults

1994 ◽  
Vol 3 (1) ◽  
pp. 40-54 ◽  
Author(s):  
RS Erickson ◽  
LT Meyer
Keyword(s):  
Critical Care ◽  
Pulmonary Artery ◽  
Temperature Measurement ◽  
High Variability ◽  
External Factors ◽  
University Teaching ◽  
Convenience Sample ◽  
Critical Care Units ◽  
Bladder Temperature ◽  
Pulmonary Artery Catheters

OBJECTIVE: To compare the accuracy of infrared ear-based temperature measurement in relation to thermometer, ear position, and other temperature methods, with pulmonary artery temperature as the reference. METHODS: Ear-based temperature measurements were made with four infrared thermometers, three in the core mode and two in the unadjusted mode, each with tug and no-tug techniques. Pulmonary artery, bladder (n = 21), and axillary temperatures were read after each ear-based measurement and oral temperature was measured once when possible (n = 32). Subjects consisted of a convenience sample of 50 patients with pulmonary artery catheters who were in adult critical care units of a university teaching hospital. RESULTS: Ear-based measurements correlated well with pulmonary artery temperature (r = .87 to .91), although closeness of agreement differed among thermometer-mode combinations (mean offsets = -0.7 to 0.5 degree C) and had moderately high variability between subjects (SD = +/- 0.5 degree C) with all instruments. Use of an ear tug either made no difference or resulted in slightly lower readings. Bladder temperature was nearly identical to pulmonary artery temperature values (r = .99, offset = 0.0 +/- 0.2 degree C). Oral readings were slightly lower (r = .78, offset = -0.2 degree C) and axillary readings much more so (r = .80 to .82, offset = -0.7 degree C); both were highly variable (SD = +/- 0.6 degree C) and affected by external factors. CONCLUSIONS: Infrared ear thermometry is useful for clinical temperature measurement as long as moderately high variability between patients is acceptable. Readings differ among thermometers, although several instruments provide values close to pulmonary artery temperature in adults. Readings are not higher with an ear tug. Bladder temperature substitutes well for pulmonary artery temperature, whereas oral and axillary values may be influenced by external factors in the critical care setting.

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