https://scholars.lib.ntu.edu.tw/handle/123456789/297255
Title: | Pain model and fuzzy logic patient-controlled analgesia in shock-wave lithotripsy | Authors: | Shieh, J.-S. Chang, L.-W. Wang, M.-S. Wang, Y.-P. Yang, Y.-P. Sun, W.-Z. YEE-PIEN YANG |
Keywords: | Extracorporeal shock-wave lithotripsy; Fuzzy logic control; Pain intensity scale; Pain model; Patient-controlled analgesia | Issue Date: | 2002 | Journal Volume: | 40 | Journal Issue: | 1 | Start page/Pages: | 128-136 | Source: | Medical and Biological Engineering and Computing | Abstract: | Pain control in conscious patients was investigated using a push-button, demand-driven supply of drugs. A fuzzy logic patient-controlled analgesia (PCA) algorithm was compared with a conventional algorithm, for alfentanil administration in extracorporeal shock-wave lithotripsy. The conventional PCA algorithm used an initial dose of 0.25 mg, a fixed infusion rate of 60 mg h-1 and a fixed bolus size of 0.2 mg with a 1 min lockout. The fuzzy logic PCA algorithm used an initial dose of 0.25 mg, a changeable infusion rate and a bolus size of 0.1 or 0.05 mg. The infusion rate was adjusted according to a look-up table that accepted the button-pressing history over the last three lockout intervals. The look-up table was designed using fuzzy logic. The bolus size was adjusted according to the button-pressing history over the past two lockout intervals. Twelve patients were treated using conventional PCA, and thirteen were treated with PCA + fuzzy logic control (FLC). PCA + FLC patients consumed 45% less drug. Also, PCA + FLC patients had a mean delivery/demand ratio of 82%, compared with 60% in conventional PCA. When the pain intensity scale was analysed, PCA + FLC patients had acceptable pain intensity at 62%, compared with 44% in conventional PCA. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-0036125478&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/297255 https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036125478&doi=10.1007%2fBF02347706&partnerID=40&md5=7aec5785691780dd0e8da169202cd247 |
ISSN: | 01400118 | SDG/Keyword: | Algorithms; Fuzzy sets; Patient treatment; Shock waves; Infusion rate; Biomedical engineering; alfentanil; adult; aged; algorithm; article; bolus injection; clinical article; controlled study; dose response; drug delivery system; drug infusion; extracorporeal lithotripsy; female; human; intermethod comparison; male; model; nephrolithiasis; pain; pain assessment; patient controlled analgesia; rating scale |
Appears in Collections: | 機械工程學系 |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.