| Ventilator waveform interpretation in mechanically ventilated small animals. | |
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MedLine Citation:
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PMID: 22316197 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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OBJECTIVE: To review the topic of ventilator waveforms analysis with emphasis on interpretation of ventilator waveforms and their use in the management and monitoring of mechanically ventilated small animal patients. DATA SOURCES: Human clinical studies, scientific reviews, and textbooks, as well as veterinary textbooks and clinical examples of ventilator waveforms in mechanically ventilated dogs. SUMMARY: Ventilator waveforms are graphic representations of data collected from the ventilator and reflect patient-ventilator interactions. The 4 parameters pressure, volume, flow, and time are most descriptive of mechanical ventilation. Typically, 3 different graphs, also referred to as scalars, consisting of pressure versus time, volume versus time, and flow versus time, with time always plotted on the x-axis, are used. Changes in the ventilator settings as well as in the characteristics of the lungs such as airway resistance (R(aw)) and respiratory system compliance (C(rs)) can be recognized from specific variations in the waveforms. Flow-volume and pressure-volume loops provide additional information about changes in lung function. Patient-ventilator dyssynchrony is a common problem during mechanical ventilation and can lead to patient discomfort and an increased work of breathing. Ventilator waveforms are helpful to identify dyssynchrony, which can be divided into trigger, flow, cycle, and expiratory dyssynchrony. Ventilator waveforms allow the clinician to assess changes in respiratory mechanics, and can be useful in monitoring the progression of disease pathology and response to therapy. Adjustments in ventilator settings based on proper analysis and interpretation of these waveforms can help the clinician to optimize ventilation therapy. CONCLUSIONS: Ventilator waveforms are graphic representations of patient-ventilator interactions. Proper interpretation of ventilator waveforms affords the critical care clinician a better understanding of the patient's respiratory function, response to therapy, and causes for patient-ventilator dyssynchrony. Ventilator waveform interpretation is an important tool in the assessment and management of mechanically ventilated small animal patients. |
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Authors:
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Terry M Corona; Marcel Aumann |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of veterinary emergency and critical care (San Antonio, Tex. : 2001) Volume: 21 ISSN: 1476-4431 ISO Abbreviation: J Vet Emerg Crit Care (San Antonio) Publication Date: 2011 Oct |
Date Detail:
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Created Date: 2012-02-09 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101152804 Medline TA: J Vet Emerg Crit Care (San Antonio) Country: United States |
Other Details:
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Languages: eng Pagination: 496-514 Citation Subset: IM |
Copyright Information:
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© Veterinary Emergency and Critical Care Society 2011. |
Affiliation:
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Critical Care Department at Florida Veterinary Specialists, Busch Lake Blvd, Tampa, FL, 33614. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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