Document Detail

Randomized comparison of closed-loop feedback computer-controlled with manual-controlled infusion of phenylephrine for maintaining arterial pressure during spinal anaesthesia for Caesarean delivery.
MedLine Citation:
PMID:  23015618     Owner:  NLM     Status:  Publisher    
BACKGROUND: /st>Closed-loop feedback computer-controlled infusion has not been described for administering phenylephrine to maintain arterial pressure (AP) during spinal anaesthesia for Caesarean delivery. We aimed to compare AP control using this automated system with a previously described manual infusion system. METHODS: /st>We randomly allocated 222 healthy subjects having spinal anaesthesia for scheduled Caesarean delivery to have systolic AP maintained near baseline with phenylephrine (100 µg ml(-1)) by computer-controlled infusion utilizing a proportional algorithm or manual-controlled infusion utilizing an on-off algorithm. AP control was assessed by comparing the proportion of systolic AP measurements within ±20% of baseline and by performance error (PE) calculations. RESULTS: /st>A total of 212 subjects finished the study. In the computer-control group, 97% of systolic AP recordings fell within ±20% of baseline compared with 95% in the manual-control group (P=0.0004). For computer-control compared with manual-control, wobble was smaller [median 3.5 (inter-quartile range 2.5-4.8)% vs 4.2 (3.3-5.9)%, P=0.003], but there was no difference in the median PE [2.9 (0.3-4.7)% vs 1.9 (0-4.2)%], median absolute PE [4.7 (3.5-5.6)% vs 4.7 (3.8-6.7)%], or divergence [-0.01 (-0.03-0)% vs -0.06 (-0.26-0.08)%]. Fewer interventions per subject for controlling AP were required in the computer-control group [2 (2-2) vs 10 (8-13), P<0.001]. There were no differences in measured clinical outcomes. CONCLUSIONS: /st>Within the constraints of the studied algorithms, closed-loop feedback computer-controlled phenylephrine infusion provided better AP control with fewer interventions required compared with manual-controlled infusion.
W D Ngan Kee; K S Khaw; F F Ng; Y H Tam
Related Documents :
1914468 - Passive geometric and elastic properties of human cadaver common carotid artery segment...
10840228 - Model analogues in the study of cephalic circulation.
19187108 - Angiokeratoma-like changes in extragenital and genital lichen sclerosus.
20815618 - Design of a standalone-type beryllium vessel for high-pressure protein crystallography.
1519848 - Effect of positive end-expiratory pressure on right ventricular function in humans.
2141768 - Role of renal interstitial hydrostatic pressure in natriuretic response to anp.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-9-25
Journal Detail:
Title:  British journal of anaesthesia     Volume:  -     ISSN:  1471-6771     ISO Abbreviation:  Br J Anaesth     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-9-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372541     Medline TA:  Br J Anaesth     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, People's Republic of China.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Systemic metoclopramide to prevent postoperative nausea and vomiting: a meta-analysis without Fujii'...
Next Document:  Magnetic resonance imaging study of the in vivo position of the extraglottic airway devices i-gel™...