Clinical trial NCT02568345: Sugammadex ED90 Dose in the Obese Patients
Official title: Sugammadex ED90 Dose to Reverse the Rocuronium Blockade in the Obese Patients
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE4
Conditions: Incomplete Reversal of Neuromuscular Block
Keywords: Dose-Response Relationship
Drug
Obesity
Cyclodextrins
Lead sponsor: Faculdade de Ciências Médicas da Santa Casa de São Paulo
Sponsor class: OTHER
First posted: 2015-10-05
Enrollment: 31
Sex: ALL
Minimum age (years): 18
Maximum age (years): 60
Standard ages: ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: The purpose of this study is to determine the minimum effective dose of sugammadex, an antagonist of neuromuscular blockade used during anesthesia practice, in obese patients, considering that sugammadex is indicated in adults with normal weight at a dose of 2 mg/kg but no studies were found with obese patients.

Detailed description: Prospective study with the sequential design method up-and-down of the biased coin aimed to determine the minimum effective dose in 90% of patients (ED90).

The following doses were chosen: 2.0 mg.kg-1, 2.2 mg.kg-1, 2.4 mg.kg-1, 2.6 mg.kg-1, 2.8 mg.kg-1.

The complete reversal of moderate rocuronium-induced neuromuscular blockade (NMB) considered a T4/T1 ratio ≥ 0.9 with the peripheral nerve stimulator and accelerometer (monitor of sequential electric stimuli) "train-of-four" (TOF).

After induction of general anesthesia and the calibration of the peripheral nerve stimulator and accelerometer, rocuronium 0.6 mg.kg-1 was injected.

Continuous intravenous infusion of the anesthetics propofol and remifentanil, and intermittent bolus of rocuronium were offered throughout the procedure.

Eligibility criteria: Inclusion Criteria:

* a body mass index ≥ 40 kg/m2
* bariatric surgery
* informed consent signed

Exclusion Criteria:

* history of neuromuscular diseases,
* use of drugs that could interfere with neuromuscular transmission,
* allergy to neuromuscular agents of the aminosteroids class,
* anticipated difficulty in airway management,
* renal failure

Primary outcomes:
measure: Sugammadex ED90
timeFrame: 8 minutes
Secondary outcomes:
Other outcomes:
Locations:
Study officials:
affiliation: Full professor
name: Lígia Andrade ST Mathias, MD, Ph.D
role: STUDY_DIRECTOR
References:
citation: 1983 metropolitan height and weight tables. Stat Bull Metrop Life Found. 1983 Jan-Jun;64(1):3-9. No abstract available.
citation: Abernethy DR, Greenblatt DJ, Divoll M, Smith RB, Shader RI. The influence of obesity on the pharmacokinetics of oral alprazolam and triazolam. Clin Pharmacokinet. 1984 Mar-Apr;9(2):177-83. doi: 10.2165/00003088-198409020-00005.
citation: Blouin RA, Kolpek JH, Mann HJ. Influence of obesity on drug disposition. Clin Pharm. 1987 Sep;6(9):706-14.
citation: de Boer HD, Driessen JJ, Marcus MA, Kerkkamp H, Heeringa M, Klimek M. Reversal of rocuronium-induced (1.2 mg/kg) profound neuromuscular block by sugammadex: a multicenter, dose-finding and safety study. Anesthesiology. 2007 Aug;107(2):239-44. doi: 10.1097/01.anes.0000270722.95764.37.
citation: Donati F. Sugammadex: a cyclodextrin to reverse neuromuscular blockade in anaesthesia. Expert Opin Pharmacother. 2008 Jun;9(8):1375-86. doi: 10.1517/14656566.9.8.1375.
citation: Duffull SB, Dooley MJ, Green B, Poole SG, Kirkpatrick CM. A standard weight descriptor for dose adjustment in the obese patient. Clin Pharmacokinet. 2004;43(15):1167-78. doi: 10.2165/00003088-200443150-00007.
citation: Epemolu O, Bom A, Hope F, Mason R. Reversal of neuromuscular blockade and simultaneous increase in plasma rocuronium concentration after the intravenous infusion of the novel reversal agent Org 25969. Anesthesiology. 2003 Sep;99(3):632-7; discussion 6A. doi: 10.1097/00000542-200309000-00018.
citation: Janmahasatian S, Duffull SB, Ash S, Ward LC, Byrne NM, Green B. Quantification of lean bodyweight. Clin Pharmacokinet. 2005;44(10):1051-65. doi: 10.2165/00003088-200544100-00004.
citation: Mosteller RD. Simplified calculation of body-surface area. N Engl J Med. 1987 Oct 22;317(17):1098. doi: 10.1056/NEJM198710223171717. No abstract available.
citation: Nicholson WT, Sprung J, Jankowski CJ. Sugammadex: a novel agent for the reversal of neuromuscular blockade. Pharmacotherapy. 2007 Aug;27(8):1181-8. doi: 10.1592/phco.27.8.1181.
citation: Pai MP, Paloucek FP. The origin of the "ideal" body weight equations. Ann Pharmacother. 2000 Sep;34(9):1066-9. doi: 10.1345/aph.19381.
citation: Renes SH, van Geffen GJ, Rettig HC, Gielen MJ, Scheffer GJ. Minimum effective volume of local anesthetic for shoulder analgesia by ultrasound-guided block at root C7 with assessment of pulmonary function. Reg Anesth Pain Med. 2010 Nov-Dec;35(6):529-34. doi: 10.1097/AAP.0b013e3181fa1190.
citation: Sorgenfrei IF, Norrild K, Larsen PB, Stensballe J, Ostergaard D, Prins ME, Viby-Mogensen J. Reversal of rocuronium-induced neuromuscular block by the selective relaxant binding agent sugammadex: a dose-finding and safety study. Anesthesiology. 2006 Apr;104(4):667-74. doi: 10.1097/00000542-200604000-00009.
citation: Stylianou M, Flournoy N. Dose finding using the biased coin up-and-down design and isotonic regression. Biometrics. 2002 Mar;58(1):171-7. doi: 10.1111/j.0006-341x.2002.00171.x.
citation: Demirkaya M, Kelsaka E, Sarihasan B, Bek Y, Ustun E. The optimal dose of remifentanil for acceptable intubating conditions during propofol induction without neuromuscular blockade. J Clin Anesth. 2012 Aug;24(5):392-7. doi: 10.1016/j.jclinane.2011.11.006.
citation: Garrett-Mayer E. The continual reassessment method for dose-finding studies: a tutorial. Clin Trials. 2006;3(1):57-71. doi: 10.1191/1740774506cn134oa.
citation: George RB, McKeen D, Chaplin AC, McLeod L. Up-down determination of the ED(90) of oxytocin infusions for the prevention of postpartum uterine atony in parturients undergoing Cesarean delivery. Can J Anaesth. 2010 Jun;57(6):578-82. doi: 10.1007/s12630-010-9297-1. Epub 2010 Mar 18.
citation: Gupta PK, Hopkins PM. Effect of concentration of local anaesthetic solution on the ED(5)(0) of bupivacaine for supraclavicular brachial plexus block. Br J Anaesth. 2013 Aug;111(2):293-6. doi: 10.1093/bja/aet033. Epub 2013 Mar 26.
citation: Hammer GB, Litalien C, Wellis V, Drover DR. Determination of the median effective concentration (EC50) of propofol during oesophagogastroduodenoscopy in children. Paediatr Anaesth. 2001;11(5):549-53. doi: 10.1046/j.1460-9592.2001.00731.x.
citation: Hennebry MC, Stocks GM, Belavadi P, Barnes J, Wray S, Columb MO, Lyons G. Effect of i.v. phenylephrine or ephedrine on the ED50 of intrathecal bupivacaine with fentanyl for caesarean section. Br J Anaesth. 2009 Jun;102(6):806-11. doi: 10.1093/bja/aep095. Epub 2009 May 2.
citation: Kodaka M, Suzuki T, Maeyama A, Koyama K, Miyao H. Gender differences between predicted and measured propofol C(P50) for loss of consciousness. J Clin Anesth. 2006 Nov;18(7):486-9. doi: 10.1016/j.jclinane.2006.08.004.
citation: Llaurado S, Sabate A, Ferreres E, Camprubi I, Cabrera A. Sugammadex ideal body weight dose adjusted by level of neuromuscular blockade in laparoscopic bariatric surgery. Anesthesiology. 2012 Jul;117(1):93-8. doi: 10.1097/ALN.0b013e3182580409.
citation: Pace NL, Stylianou MP. Advances in and limitations of up-and-down methodology: a precis of clinical use, study design, and dose estimation in anesthesia research. Anesthesiology. 2007 Jul;107(1):144-52. doi: 10.1097/01.anes.0000267514.42592.2a.
citation: Stylianou M, Proschan M, Flournoy N. Estimating the probability of toxicity at the target dose following an up-and-down design. Stat Med. 2003 Feb 28;22(4):535-43. doi: 10.1002/sim.1351.
citation: Taha AM, Abd-Elmaksoud AM. Lidocaine use in ultrasound-guided femoral nerve block: what is the minimum effective anaesthetic concentration (MEAC90)? Br J Anaesth. 2013 Jun;110(6):1040-4. doi: 10.1093/bja/aes595. Epub 2013 Feb 5.
citation: Van Lancker P, Dillemans B, Bogaert T, Mulier JP, De Kock M, Haspeslagh M. Ideal versus corrected body weight for dosage of sugammadex in morbidly obese patients. Anaesthesia. 2011 Aug;66(8):721-5. doi: 10.1111/j.1365-2044.2011.06782.x. Epub 2011 Jun 21.