PMID- 15845682 OWN - NLM STAT- MEDLINE DCOM- 20050526 LR - 20210902 IS - 0003-2999 (Print) IS - 0003-2999 (Linking) VI - 100 IP - 5 DP - 2005 May TI - The quantitative distinction between train-of-four "counts of 2" and posttetanic "counts of 2" evidenced by a stable paralysis/stable infusion rate method in anesthetized patients receiving mivacurium. PG - 1348-1351 LID - 10.1213/01.ANE.0000148693.12874.22 [doi] AB - In this study we quantitatively evaluated, by a stable paralysis/stable infusion rate method, the difference between two standardized paralysis levels--train-of-four (TOF) count of 2 responses and posttetanic count (PTC) of 2. Ten ASA physical status I-II consenting adult patients scheduled for elective surgery were anesthetized (sufentanil/propofol), tracheally intubated, mechanically normoventilated with a fixed O(2)/air mixture, and normothermic; oropharynx and thenar temperatures were maintained above 36 degrees and 32.5 degrees C, respectively. After partial recovery from 200 microg/kg mivacurium (MIV), stable tactile TOF and PTC counts of 2 paralysis levels were induced on the adductor pollicis muscle by manual adjustments of an infusion pump containing MIV. The paralysis levels and the infusion rates were considered as stable once they remained constant at 4 consecutive time points separated by 5 min each. Infusion rates observed were: TOF count 2-6 (2-11) and PTC 2-17 (3-18) microg . kg(-1) . min(-1) (P < 0.001; Wilcoxon's paired comparison test). Under the present conditions, obtaining and maintaining a PTC of 2 requires MIV infusion rates far in excess of the "standard" recommendations mentioned in the literature for MIV infusion management. FAU - d'Hollander, A A AU - d'Hollander AA AD - Service d' Anesthesiologie, Hopital Universitaire de Geneve, Geneve, Switzerland. FAU - Pytel, A V AU - Pytel AV FAU - Merzouga, B M AU - Merzouga BM FAU - Klopfenstein, C -E AU - Klopfenstein C- LA - eng PT - Journal Article PL - United States TA - Anesth Analg JT - Anesthesia and analgesia JID - 1310650 RN - 0 (Isoquinolines) RN - 0 (Neuromuscular Nondepolarizing Agents) RN - 77D66S9Q93 (Mivacurium) SB - IM MH - Adult MH - Anesthesia MH - Female MH - Humans MH - Infusions, Intravenous MH - Isoquinolines/*administration & dosage/pharmacology MH - Male MH - Middle Aged MH - Mivacurium MH - Muscle Relaxation/*drug effects MH - Neuromuscular Nondepolarizing Agents/*pharmacology EDAT- 2005/04/23 09:00 MHDA- 2005/05/27 09:00 CRDT- 2005/04/23 09:00 PHST- 2005/04/23 09:00 [pubmed] PHST- 2005/05/27 09:00 [medline] PHST- 2005/04/23 09:00 [entrez] AID - 00000539-200505000-00025 [pii] AID - 10.1213/01.ANE.0000148693.12874.22 [doi] PST - ppublish SO - Anesth Analg. 2005 May;100(5):1348-1351. doi: 10.1213/01.ANE.0000148693.12874.22.