Document Detail

Effect of epidural block on the lag time of pulse oximeter response.
MedLine Citation:
PMID:  9038440     Owner:  NLM     Status:  MEDLINE    
Thirty-six healthy patients, ASA 1, aged 16-41 years, scheduled for elective plastic surgery were studied to determine if thoracocervical or lumbar epidural blocks affected the lag time of the pulse oximeter response. Patients were allocated to receive thoracocervical epidural block (n = 20) (group 1) (lignocaine 1%) or lumbar epidural block (n = 16) (group 2) (lignocaine 1.5%). Epidural block was performed with a 17-gauge Tuohy needle inserted in the midline between C7-T2 vertebrae in group 1 and between L1-S1 in group 2 and an epidural catheter was introduced. Arterial oxygen saturation (SpO2) was measured continuously using a Datex pulse oximeter. The lag time of the pulse oximeter response was measured while breathing oxygen (100%) after breath-holding. Values were obtained 10 min before and 5, 10, 15, 20, 30, and 40 min after epidural injection of a test dose. There was a progressive decrease in the lag time of the pulse oximeter response so that by 30 min after epidural injection the mean (SD) value had decreased from 29 (6.1) to 14 (3.4) in Group 1 and 41 (12.8) to 23 (7.9) s in group 2 (p < 0.01).
F S Xue; X Liao; S Y Tong; Q H Liu; G An; L K Luo
Publication Detail:
Type:  Clinical Trial; Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Anaesthesia     Volume:  51     ISSN:  0003-2409     ISO Abbreviation:  Anaesthesia     Publication Date:  1996 Dec 
Date Detail:
Created Date:  1997-03-07     Completed Date:  1997-03-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0370524     Medline TA:  Anaesthesia     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1102-5     Citation Subset:  AIM; IM    
Chinese Association of Anaesthesiology, People's Republic of China.
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MeSH Terms
Anesthesia, Epidural*
Anesthetics, Local
Blood Pressure
Heart Rate
Monitoring, Intraoperative*
Oxygen / blood
Partial Pressure
Surgery, Plastic
Time Factors
Reg. No./Substance:
0/Anesthetics, Local; 137-58-6/Lidocaine; 7782-44-7/Oxygen

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