Document Detail

Determination of ideal PtcO2 measurement time in evaluation of hypoxic wound patients.
MedLine Citation:
PMID:  18351126     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Evaluation of ideal time for baseline PtcO2 readings in air, elevation test, and oxygen challenge during evaluation of hypoxic wound patients. DESIGN: Retrospective analysis. IRB APPROVAL: Western IRB deemed this study exempt from requiring IRB approval. PATIENTS: 202 patients with lower extremity wounds. METHOD: Patients had PtcO2 measurements using 6 electrodes positioned in 3 paired locations along the limb (above the knee: AK; below the knee: BK; and foot). Measurements were made from each electrode at 7 different time-event occasions: position of limb (supine or elevated), type of breathing gas (sea level air or oxygen), and time of measurement. A total of 8,484 measurements were analyzed by first examining each electrode's data, and then pooling the data for each location pair. MAIN RESULTS: PtcO2 readings for air (10 minutes) were less than air at 20 minutes. Maximal readings were close to the 20-minute mark for AK and BK measurements, and closer to 30 minutes for the foot. Elevation test at 3 versus 5 minutes showed a continuing decline in PtcO2 values. Oxygen challenge readings at 5 and 10 minutes were significantly different: the latter always larger than the former. CONCLUSION: Ideal times for baseline readings, leg elevation test, and oxygen challenge test are at least 20, 5, and 10 minutes, respectively.
J B Shah; D M Ram; E Fredrick; G H Otto; P J Sheffield
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Publication Detail:
Type:  Evaluation Studies; Journal Article    
Journal Detail:
Title:  Undersea & hyperbaric medicine : journal of the Undersea and Hyperbaric Medical Society, Inc     Volume:  35     ISSN:  1066-2936     ISO Abbreviation:  Undersea Hyperb Med     Publication Date:    2008 Jan-Feb
Date Detail:
Created Date:  2008-03-20     Completed Date:  2008-04-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9312954     Medline TA:  Undersea Hyperb Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  41-51     Citation Subset:  IM; S    
Wound Care and Hyperbaric Medicine Department, Southwest General Hospital, San Antonio, TX 78224, USA.
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MeSH Terms
Blood Gas Monitoring, Transcutaneous / methods,  standards*
Leg Injuries / metabolism*
Oxygen / administration & dosage,  analysis*
Regression Analysis
Retrospective Studies
Time Factors
Reg. No./Substance:

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