Pharmacokinetics of Fentanyl and Its Derivatives in Children: A Comprehensive Review
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Abstract
Fentanyl and its derivatives sufentanil, alfentanil, and remifentanil are potent opioids. A comprehensive review of the use of fentanyl and its derivatives in the pediatric population was performed using the National Library of Medicine PubMed. Studies were included if they contained original pharmacokinetic parameters or models using established routes of administration in patients younger than 18 years of age. Of 372 retrieved articles, 44 eligible pharmacokinetic studies contained data of 821 patients younger than 18 years of age, including more than 46 preterm infants, 64 full-term neonates, 115 infants/toddlers, 188 children, and 28 adolescents. Underlying diagnoses included congenital heart and pulmonary disease and abdominal disorders. Routes of drug administration were intravenous, epidural, oral-transmucosal, intranasal, and transdermal. Despite extensive use in daily clinical practice, few studies have been performed. Preterm and term infants have lower clearance and protein binding. Pharmacokinetics was not altered by chronic renal or hepatic disease. Analyses of the pooled individual patients’ data revealed that clearance maturation relating to body weight could be best described by the Hill function for sufentanil (R 2 = 0.71, B max 876 mL/min, K 50 16.3 kg) and alfentanil (R 2 = 0.70, B max (fixed) 420 mL/min, K 50 28 kg). The allometric exponent for estimation of clearance of sufentanil was 0.99 and 0.75 for alfentanil clearance. Maturation of remifentanil clearance was described by linear regression to bodyweight (R 2 = 0.69). The allometric exponent for estimation of remifentanil clearance was 0.76. For fentanyl, linear regression showed only a weak correlation between clearance and bodyweight in preterm and term neonates (R 2 = 0.22) owing to a lack of data in older age groups. A large heterogeneity regarding study design, clinical setting, drug administration, laboratory assays, and pharmacokinetic estimation was observed between studies introducing bias into the analyses performed in this review. A limitation of this review is that pharmacokinetic data, based on different modes of administration, dosing schemes, and parameter estimation methods, were combined.
Notes
Compliance with Ethical Standards
Funding
The research leading to this manuscript has received funding from the European Union’s Seventh Framework Programme for research; technological development, and demonstration under Grant Agreement No. 261060 (Global Research in Paediatrics—network of excellence). Janelle D. Vaughns (5T32HD087969) and Johannes N. van den Anker (5T32HD087969 and 5U54HD090254) were supported by National Institutes of Health Grants to conduct this review.
Conflict of interest
Victoria C. Ziesenitz, Janelle D. Vaughns, Gilbert Koch, Gerd Mikus, and Johannes N. van den Anker have no conflicts of interest directly relevant to the content of this review.
References
- 1.Stanley TH. The history and development of the fentanyl series. J Pain Symptom Manag. 1992;7(3 Suppl.):S3–7.CrossRefGoogle Scholar
- 2.James MK, Feldman PL, Schuster SV, Bilotta JM, Brackeen MF, Leighton HJ. Opioid receptor activity of GI 87084B, a novel ultra-short acting analgesic, in isolated tissues. J Pharmacol Exp Ther. 1991;259(2):712–8.PubMedGoogle Scholar
- 3.Bovill JG, Sebel PS, Blackburn CL, Oei-Lim V, Heykants JJ. The pharmacokinetics of sufentanil in surgical patients. Anesthesiology. 1984;61(5):502–6.PubMedCrossRefGoogle Scholar
- 4.Bower S, Hull CJ. Comparative pharmacokinetics of fentanyl and alfentanil. Br J Anaesth. 1982;54(8):871–7.PubMedCrossRefGoogle Scholar
- 5.Feierman DE, Lasker JM. Metabolism of fentanyl, a synthetic opioid analgesic, by human liver microsomes: role of CYP3A4. Drug Metab Dispos. 1996;24(9):932–9.PubMedGoogle Scholar
- 6.Tateishi T, Krivoruk Y, Ueng YF, Wood AJ, Guengerich FP, Wood M. Identification of human liver cytochrome P-450 3A4 as the enzyme responsible for fentanyl and sufentanil N-dealkylation. Anesth Analg. 1996;82(1):167–72.PubMedGoogle Scholar
- 7.Labroo RB, Paine MF, Thummel KE, Kharasch ED. Fentanyl metabolism by human hepatic and intestinal cytochrome P450 3A4: implications for interindividual variability in disposition, efficacy, and drug interactions. Drug Metab Dispos. 1997;25(9):1072–80.PubMedGoogle Scholar
- 8.Mahlke NS, Ziesenitz V, Mikus G, Skopp G. Quantitative low-volume assay for simultaneous determination of fentanyl, norfentanyl, and minor metabolites in human plasma and urine by liquid chromatography-tandem mass spectrometry (LC–MS/MS). Int J Legal Med. 2014;128(5):771–8.PubMedCrossRefGoogle Scholar
- 9.Chauvin M, Bonnet F, Montembault C, Levron JC, Viars P. The influence of hepatic plasma flow on alfentanil plasma concentration plateaus achieved with an infusion model in humans: measurement of alfentanil hepatic extraction coefficient. Anesth Analg. 1986;65(10):999–1003.PubMedCrossRefGoogle Scholar
- 10.Meuldermans W, Van Peer A, Hendrickx J, Woestenborghs R, Lauwers W, Heykants J, et al. Alfentanil pharmacokinetics and metabolism in humans. Anesthesiology. 1988;69(4):527–34.PubMedCrossRefGoogle Scholar
- 11.Murphy MR, Hug CC Jr, McClain DA. Dose-independent pharmacokinetics of fentanyl. Anesthesiology. 1983;59(6):537–40.PubMedCrossRefGoogle Scholar
- 12.Gepts E, Shafer SL, Camu F, Stanski DR, Woestenborghs R, Van Peer A, et al. Linearity of pharmacokinetics and model estimation of sufentanil. Anesthesiology. 1995;83(6):1194–204.PubMedCrossRefGoogle Scholar
- 13.Goresky GV, Koren G, Sabourin MA, Sale JP, Strunin L. The pharmacokinetics of alfentanil in children. Anesthesiology. 1987;67(5):654–9.PubMedCrossRefGoogle Scholar
- 14.Westmoreland CL, Hoke JF, Sebel PS, Hug CC Jr, Muir KT. Pharmacokinetics of remifentanil (GI87084B) and its major metabolite (GI90291) in patients undergoing elective inpatient surgery. Anesthesiology. 1993;79(5):893–903.PubMedCrossRefGoogle Scholar
- 15.Egan TD, Lemmens HJ, Fiset P, Hermann DJ, Muir KT, Stanski DR, et al. The pharmacokinetics of the new short-acting opioid remifentanil (GI87084B) in healthy adult male volunteers. Anesthesiology. 1993;79(5):881–92.PubMedCrossRefGoogle Scholar
- 16.Hughes MA, Glass PS, Jacobs JR. Context-sensitive half-time in multicompartment pharmacokinetic models for intravenous anesthetic drugs. Anesthesiology. 1992;76(3):334–41.PubMedCrossRefGoogle Scholar
- 17.Anderson BJ. Pharmacokinetics and pharmacodynamics in the pediatric patient. In: Absalom AR, Mason KP, editors. Total intravenous anesthesia and target controlled infusions. Cham: Springer; 2017. p. 441–516.CrossRefGoogle Scholar
- 18.Opioide Schäfer M. In: Tonner PH, Hein L, editors. Pharmakotherapie in der Anästhesie und Intensivmedizin. Heidelberg: Springer; 2011. p. 110–8.Google Scholar
- 19.EMA. ICH topic E11 clinical investigation of medicinal products in the paediatric population. 2001. http://www.ema.europa.eu/docs/en_GB/document_library/Scientific_guideline/2009/09/WC500002926.pdf. Accessed 18 Aug 2016.
- 20.Goutelle S, Maurin M, Rougier F, Barbaut X, Bourguignon L, Ducher M, et al. The Hill equation: a review of its capabilities in pharmacological modelling. Fundam Clin Pharmacol. 2008;22(6):633–48.PubMedCrossRefGoogle Scholar
- 21.Koch G, Schropp J, Jusko WJ. Assessment of non-linear combination effect terms for drug–drug interactions. J Pharmacokinet Pharmacodyn. 2016;43(5):461–79.PubMedPubMedCentralCrossRefGoogle Scholar
- 22.Longo G, Montévil M. Scaling and scale symmetries in biological systems: perspectives on organisms lecture notes in morphogenesis. Berlin: Springer; 2014.CrossRefGoogle Scholar
- 23.Kuczmarski RJ, Ogden CL, Guo SS, Grummer-Strawn LM, Flegal KM, Mei Z, et al. CDC growth charts for the United States: methods and development. Vital Health Stat (data from the national health survey). 2000;11(246):1–190.Google Scholar
- 24.Johnson KL, Erickson JP, Holley FO, Scott JC. Fentanyl pharmacokinetics in the pediatric population. Anesthesiology. 1984;61(3A):1.Google Scholar
- 25.Rosaeg OP, Kitts JB, Koren G, Byford LJ. Maternal and fetal effects of intravenous patient-controlled fentanyl analgesia during labour in a thrombocytopenic parturient. Can J Anaesth. 1992;39(3):277–81.PubMedCrossRefGoogle Scholar
- 26.Singleton MA, Rosen JI, Fisher DM. Plasma concentrations of fentanyl in infants, children and adults. Can J Anaesth. 1987;34(2):152–5.PubMedCrossRefGoogle Scholar
- 27.Anderson BJ, Holford NH. Tips and traps analyzing pediatric PK data. Paediatr Anaesth. 2011;21(3):222–37.PubMedCrossRefGoogle Scholar
- 28.Grasela TH, Sheiner LB, Rambeck B, Boenigk HE, Dunlop A, Mullen PW, et al. Steady-state pharmacokinetics of phenytoin from routinely collected patient data. Clin Pharmacokinet. 1983;8(4):355–64.PubMedCrossRefGoogle Scholar
- 29.Koehntop DE, Rodman JH, Brundage DM, Hegland MG, Buckley JJ. Pharmacokinetics of fentanyl in neonates. Anesth Analg. 1986;65(3):227–32.PubMedCrossRefGoogle Scholar
- 30.Masey SA, Koehler RC, Ruck JR, Pepple JM, Rogers MC, Traystman RJ. Effect of abdominal distension on central and regional hemodynamics in neonatal lambs. Pediatr Res. 1985;19(12):1244–9.PubMedCrossRefGoogle Scholar
- 31.Bjorkman S, Redke F. Clearance of fentanyl, alfentanil, methohexitone, thiopentone and ketamine in relation to estimated hepatic blood flow in several animal species: application to prediction of clearance in man. J Pharm Pharmacol. 2000;52(9):1065–74.PubMedCrossRefGoogle Scholar
- 32.Gauntlett IS, Fisher DM, Hertzka RE, Kuhls E, Spellman MJ, Rudolph C. Pharmacokinetics of fentanyl in neonatal humans and lambs: effects of age. Anesthesiology. 1988;69(5):683–7.PubMedCrossRefGoogle Scholar
- 33.Katz R, Kelly HW. Pharmacokinetics of continuous infusions of fentanyl in critically ill children. Crit Care Med. 1993;21(7):995–1000.PubMedCrossRefGoogle Scholar
- 34.Ginsberg B, Howell S, Glass PS, Margolis JO, Ross AK, Dear GL, et al. Pharmacokinetic model-driven infusion of fentanyl in children. Anesthesiology. 1996;85(6):1268–75.PubMedCrossRefGoogle Scholar
- 35.Hertzka RE, Gauntlett IS, Fisher DM, Spellman MJ. Fentanyl-induced ventilatory depression: effects of age. Anesthesiology. 1989;70(2):213–8.PubMedCrossRefGoogle Scholar
- 36.Olkkola KT, Hamunen K, Maunuksela EL. Clinical pharmacokinetics and pharmacodynamics of opioid analgesics in infants and children. Clin Pharmacokinet. 1995;28(5):385–404.PubMedCrossRefGoogle Scholar
- 37.Van Driest SL, Marshall MD, Hachey B, Beck C, Crum K, Owen J, et al. Pragmatic pharmacology: population pharmacokinetic analysis of fentanyl using remnant samples from children after cardiac surgery. Br J Clin Pharmacol. 2016;81(6):1165–74.PubMedPubMedCentralCrossRefGoogle Scholar
- 38.Jacqz-Aigrain E, Burtin P. Clinical pharmacokinetics of sedatives in neonates. Clin Pharmacokinet. 1996;31(6):423–43.PubMedCrossRefGoogle Scholar
- 39.Santeiro ML, Christie J, Stromquist C, Torres BA, Markowsky SJ. Pharmacokinetics of continuous infusion fentanyl in newborns. J Perinatol. 1997;17(2):135–9.PubMedGoogle Scholar
- 40.Saarenmaa E, Neuvonen PJ, Fellman V. Gestational age and birth weight effects on plasma clearance of fentanyl in newborn infants. J Pediatr. 2000;136(6):767–70.PubMedCrossRefGoogle Scholar
- 41.Collins C, Koren G, Crean P, Klein J, Roy WL, MacLeod SM. Fentanyl pharmacokinetics and hemodynamic effects in preterm infants during ligation of patent ductus arteriosus. Anesth Analg. 1985;64(11):1078–80.PubMedCrossRefGoogle Scholar
- 42.Kearns GL, Abdel-Rahman SM, Alander SW, Blowey DL, Leeder JS, Kauffman RE. Developmental pharmacology: drug disposition, action, and therapy in infants and children. N Engl J Med. 2003;349(12):1157–67.PubMedCrossRefGoogle Scholar
- 43.Roth B, Schlunder C, Houben F, Gunther M, Theisohn M. Analgesia and sedation in neonatal intensive care using fentanyl by continuous infusion. Dev Pharmacol Ther. 1991;17(3–4):121–7.PubMedCrossRefGoogle Scholar
- 44.Murat I, Levron JC, Berg A, Saint-Maurice C. Effects of fentanyl on baroreceptor reflex control of heart rate in newborn infants. Anesthesiology. 1988;68(5):717–22.PubMedCrossRefGoogle Scholar
- 45.Ancora G, Lago P, Garetti E, Pirelli A, Merazzi D, Mastrocola M, et al. Efficacy and safety of continuous infusion of fentanyl for pain control in preterm newborns on mechanical ventilation. J Pediatrics. 2013;163(3):645–651 e1.CrossRefGoogle Scholar
- 46.Fahnenstich H, Steffan J, Kau N, Bartmann P. Fentanyl-induced chest wall rigidity and laryngospasm in preterm and term infants. Crit Care Med. 2000;28(3):836–9.PubMedCrossRefGoogle Scholar
- 47.Wilson AS, Stiller RL, Davis PJ, Fedel G, Chakravorti S, Israel BA, et al. Fentanyl and alfentanil plasma protein binding in preterm and term neonates. Anesth Analg. 1997;84(2):315–8.PubMedCrossRefGoogle Scholar
- 48.Cartwright P, Prys-Roberts C, Gill K, Dye A, Stafford M, Gray A. Ventilatory depression related to plasma fentanyl concentrations during and after anesthesia in humans. Anesth Analg. 1983;62(11):966–74.PubMedCrossRefGoogle Scholar
- 49.Tran KM, Maxwell LG, Cohen DE, Adamson PC, Moll V, Kurth CD, et al. Quantification of serum fentanyl concentrations from umbilical cord blood during ex utero intrapartum therapy. Anesth Analg. 2012;114(6):1265–7.PubMedCrossRefGoogle Scholar
- 50.Pacifici GM. Clinical pharmacology of fentanyl in preterm infants: a review. Pediatr Neonatol. 2015;56(3):143–8.PubMedCrossRefGoogle Scholar
- 51.Rodieux F, Wilbaux M, van den Anker JN, Pfister M. Effect of kidney function on drug kinetics and dosing in neonates, infants, and children. Clin Pharmacokinet. 2015;54(12):1183–204.PubMedPubMedCentralCrossRefGoogle Scholar
- 52.McClain DA, Hug CC Jr. Intravenous fentanyl kinetics. Clin Pharmacol Ther. 1980;28(1):106–14.PubMedCrossRefGoogle Scholar
- 53.Schleimer R, Benjamini E, Eisele J, Henderson G. Pharmacokinetics of fentanyl as determined by radioimmunoassay. Clin Pharmacol Ther. 1978;23(2):188–94.PubMedCrossRefGoogle Scholar
- 54.Silverstein JH, Rieders MF, McMullin M, Schulman S, Zahl K. An analysis of the duration of fentanyl and its metabolites in urine and saliva. Anesth Analg. 1993;76(3):618–21.PubMedCrossRefGoogle Scholar
- 55.Koren G, Crean P, Goresky GV, Klein J, MacLeod SM. Pharmacokinetics of fentanyl in children with renal disease. Res Commun Chem Pathol Pharmacol. 1984;46(3):371–9.PubMedGoogle Scholar
- 56.Koren G, Goresky G, Crean P, Klein J, MacLeod SM. Pediatric fentanyl dosing based on pharmacokinetics during cardiac surgery. Anesth Analg. 1984;63(6):577–82.PubMedCrossRefGoogle Scholar
- 57.Buck ML. Pharmacokinetic changes during extracorporeal membrane oxygenation: implications for drug therapy of neonates. Clin Pharmacokinet. 2003;42(5):403–17.PubMedCrossRefGoogle Scholar
- 58.Hall R. The pharmacokinetic behaviour of opioids administered during cardiac surgery. Can J Anaesth. 1991;38(6):747–56.PubMedCrossRefGoogle Scholar
- 59.van den Broek MP, Groenendaal F, Egberts AC, Rademaker CM. Effects of hypothermia on pharmacokinetics and pharmacodynamics: a systematic review of preclinical and clinical studies. Clin Pharmacokinet. 2010;49(5):277–94.PubMedCrossRefGoogle Scholar
- 60.Wildschut ED, Ahsman MJ, Allegaert K, Mathot RA, Tibboel D. Determinants of drug absorption in different ECMO circuits. Intensive Care Med. 2010;36(12):2109–16.PubMedPubMedCentralCrossRefGoogle Scholar
- 61.Hynynen M. Binding of fentanyl and alfentanil to the extracorporeal circuit. Acta Anaesth Scand. 1987;31(8):706–10.PubMedCrossRefGoogle Scholar
- 62.Wildschut ED, de Wildt SN, Mathot RA, Reiss IK, Tibboel D, Van den Anker J. Effect of hypothermia and extracorporeal life support on drug disposition in neonates. Semin Fetal Neonat Med. 2013;18(1):23–7.CrossRefGoogle Scholar
- 63.Kussman BD, Zurakowski D, Sullivan L, McGowan FX, Davis PJ, Laussen PC. Evaluation of plasma fentanyl concentrations in infants during cardiopulmonary bypass with low-volume circuits. J Cardiothorac Vasc Anesth. 2005;19(3):316–21.PubMedCrossRefGoogle Scholar
- 64.Newland MC, Leuschen P, Sarafian LB, Hurlbert BJ, Fleming WF, Chapin JW, et al. Fentanyl intermittent bolus technique for anesthesia in infants and children undergoing cardiac surgery. J Cardiothorac Anesth. 1989;3(4):407–10.PubMedCrossRefGoogle Scholar
- 65.Koren G, Barker C, Goresky G, Bohn D, Kent G, Klein J, et al. The influence of hypothermia on the disposition of fentanyl: human and animal studies. Eur J Clin Pharmacol. 1987;32(4):373–6.PubMedCrossRefGoogle Scholar
- 66.Koren G, Crean P, Klein J, Goresky G, Villamater J, MacLeod SM. Sequestration of fentanyl by the cardiopulmonary bypass (CPBP). Eur J Clin Pharmacol. 1984;27(1):51–6.PubMedCrossRefGoogle Scholar
- 67.Koren G, Goresky G, Crean P, Klein J, MacLeod SM. Unexpected alterations in fentanyl pharmacokinetics in children undergoing cardiac surgery: age related or disease related? Dev Pharmacol Ther. 1986;9(3):183–91.PubMedCrossRefGoogle Scholar
- 68.Hodges UM, Berg S, Naik SK, Bower S, Lloyd-Thomas A, Elliot M. Filtration of fentanyl is not the cause of the elevation of arterial blood pressure associated with post-bypass ultrafiltration in children. J Cardiothoracic Vasc Anesth. 1994;8(6):653–7.CrossRefGoogle Scholar
- 69.Taenzer AH, Groom R, Quinn RD. Fentanyl plasma levels after modified ultrafiltration in infant heart surgery. J Extracorpor Technol. 2005;37(4):369–72.Google Scholar
- 70.Crean P, Koren G, Goresky G, Klein J, Macleod S. Fentanyl-oxygen versus fentanyl-N2O/oxygen anaesthesia in children undergoing cardiac surgery. Can Anaesth Soc J. 1986;33(1):36–40.PubMedCrossRefGoogle Scholar
- 71.Gruber EM, Laussen PC, Casta A, Zimmerman AA, Zurakowski D, Reid R, et al. Stress response in infants undergoing cardiac surgery: a randomized study of fentanyl bolus, fentanyl infusion, and fentanyl-midazolam infusion. Anesth Analg. 2001;92(4):882–90.PubMedCrossRefGoogle Scholar
- 72.Kussman BD, Gruber EM, Zurakowski D, Hansen DD, Sullivan LJ, Laussen PC. Bispectral index monitoring during infant cardiac surgery: relationship of BIS to the stress response and plasma fentanyl levels. Paediatr Anaesth. 2001;11(6):663–9.PubMedCrossRefGoogle Scholar
- 73.Arnold JH, Truog RD, Scavone JM, Fenton T. Changes in the pharmacodynamic response to fentanyl in neonates during continuous infusion. J Pediatr. 1991;119(4):639–43.PubMedCrossRefGoogle Scholar
- 74.Arnold JH, Truog RD, Orav EJ, Scavone JM, Hershenson MB. Tolerance and dependence in neonates sedated with fentanyl during extracorporeal membrane oxygenation. Anesthesiology. 1990;73(6):1136–40.PubMedCrossRefGoogle Scholar
- 75.Leuschen MP, Willett LD, Hoie EB, Bolam DL, Bussey ME, Goodrich PD, et al. Plasma fentanyl levels in infants undergoing extracorporeal membrane oxygenation. J Thorac Cardiovasc Surg. 1993;105(5):885–91.PubMedGoogle Scholar
- 76.Vaughns JD, Ziesenitz VC, van den Anker JN. Clinical pharmacology of frequently used intravenous drugs during bariatric surgery in adolescents. Curr Pharm Des. 2015;21(39):5650–9.PubMedCrossRefGoogle Scholar
- 77.Smith HL, Meldrum DJ, Brennan LJ. Childhood obesity: a challenge for the anaesthetist? Paediatr Anaesth. 2002;12(9):750–61.PubMedCrossRefGoogle Scholar
- 78.Barlow SE, Expert C. Expert committee recommendations regarding the prevention, assessment, and treatment of child and adolescent overweight and obesity: summary report. Pediatrics. 2007;120(Suppl. 4):S164–92.PubMedCrossRefGoogle Scholar
- 79.Vaughns JD, Ziesenitz VC, Williams EF, Mushtaq A, Bachmann R, Skopp G, et al. Use of fentanyl in adolescents with clinically severe obesity undergoing bariatric surgery: a pilot study. Pediatr Drugs 2017;19(3):251–7.CrossRefGoogle Scholar
- 80.Adams JP, Murphy PG. Obesity in anaesthesia and intensive care. Br J Anaesth. 2000;85(1):91–108.PubMedCrossRefGoogle Scholar
- 81.Mulla H, Johnson TN. Dosing dilemmas in obese children. Arch Dis Child Educ Pract Ed. 2010;95(4):112–7.PubMedCrossRefGoogle Scholar
- 82.Schumann R. Anaesthesia for bariatric surgery. Best Pract Res Clin Anaesthesiol. 2011;25(1):83–93.PubMedCrossRefGoogle Scholar
- 83.Shibutani K, Inchiosa MA Jr, Sawada K, Bairamian M. Accuracy of pharmacokinetic models for predicting plasma fentanyl concentrations in lean and obese surgical patients: derivation of dosing weight (“pharmacokinetic mass”). Anesthesiology. 2004;101(3):603–13.PubMedCrossRefGoogle Scholar
- 84.Shibutani K, Inchiosa MA Jr, Sawada K, Bairamian M. Pharmacokinetic mass of fentanyl for postoperative analgesia in lean and obese patients. Br J Anaesth. 2005;95(3):377–83.PubMedCrossRefGoogle Scholar
- 85.Ingrande J, Lemmens HJ. Dose adjustment of anaesthetics in the morbidly obese. Br J Anaesth. 2010;105(Suppl. 1):i16–23.PubMedCrossRefGoogle Scholar
- 86.Leykin Y, Miotto L, Pellis T. Pharmacokinetic considerations in the obese. Best Pract Res Clin Anaesthesiol. 2011;25(1):27–36.PubMedCrossRefGoogle Scholar
- 87.Lejus C, Schwoerer D, Furic I, Le Moing JP, Levron JC, Pinaud M. Fentanyl versus sufentanil: plasma concentrations during continuous epidural postoperative infusion in children. Br J Anaesth. 2000;85(4):615–7.PubMedCrossRefGoogle Scholar
- 88.Karas-Trzeciak M, Grabowski T, Woloszczuk-Gebicka B, Borucka B. Fentanyl with ropivacaine infusion for postoperative pain relief in infants and children: kinetics of epidural fentanyl. Paediatr Anaesth. 2015;25(8):818–23.PubMedCrossRefGoogle Scholar
- 89.Preston RA, Csontos ER, East KA, Kessler KF, Fisk SP, Streisand JB. Plasma fentanyl concentrations after oral transmucosal fentanyl citrate: children versus adults. Anesthesiology. 1993;79:1.Google Scholar
- 90.Dsida RM, Wheeler M, Birmingham PK, Henthorn TK, Avram MJ, Enders-Klein C, et al. Premedication of pediatric tonsillectomy patients with oral transmucosal fentanyl citrate. Anesth Analg. 1998;86(1):66–70.PubMedGoogle Scholar
- 91.Lotsch J, Walter C, Parnham MJ, Oertel BG, Geisslinger G. Pharmacokinetics of non-intravenous formulations of fentanyl. Clin Pharmacokinet. 2013;52(1):23–36.PubMedCrossRefGoogle Scholar
- 92.Wheeler M, Birmingham PK, Dsida RM, Wang Z, Cote CJ, Avram MJ. Uptake pharmacokinetics of the fentanyl oralet in children scheduled for central venous access removal: implications for the timing of initiating painful procedures. Paediatr Anaesth. 2002;12(7):594–9.PubMedCrossRefGoogle Scholar
- 93.Wheeler M, Birmingham PK, Lugo RA, Heffner CL, Cote CJ. The pharmacokinetics of the intravenous formulation of fentanyl citrate administered orally in children undergoing general anesthesia. Anesth Analg. 2004;99(5):1347–51.PubMedCrossRefGoogle Scholar
- 94.Epstein RH, Mendel HG, Witkowski TA, Waters R, Guarniari KM, Marr AT, et al. The safety and efficacy of oral transmucosal fentanyl citrate for preoperative sedation in young children. Anesth Analg. 1996;83(6):1200–5.PubMedCrossRefGoogle Scholar
- 95.Streisand JB, Stanley TH, Hague B, van Vreeswijk H, Ho GH, Pace NL. Oral transmucosal fentanyl citrate premedication in children. Anesth Analg. 1989;69(1):28–34.PubMedCrossRefGoogle Scholar
- 96.Friesen RH, Carpenter E, Madigan CK, Lockhart CH. Oral transmucosal fentanyl citrate for preanaesthetic medication of paediatric cardiac surgery patients. Paediatr Anaesth. 1995;5(1):29–33.PubMedCrossRefGoogle Scholar
- 97.Schechter NL, Weisman SJ, Rosenblum M, Bernstein B, Conard PL. The use of oral transmucosal fentanyl citrate for painful procedures in children. Pediatrics. 1995;95(3):335–9.PubMedGoogle Scholar
- 98.Borland ML, Bergesio R, Pascoe EM, Turner S, Woodger S. Intranasal fentanyl is an equivalent analgesic to oral morphine in paediatric burns patients for dressing changes: a randomised double blind crossover study. Burns. 2005;31(7):831–7.PubMedCrossRefGoogle Scholar
- 99.Borland M, Jacobs I, King B, O’Brien D. A randomized controlled trial comparing intranasal fentanyl to intravenous morphine for managing acute pain in children in the emergency department. Ann Emerg Med. 2007;49(3):335–40.PubMedCrossRefGoogle Scholar
- 100.Finn M, Harris D. Intranasal fentanyl for analgesia in the paediatric emergency department. EMJ. 2010;27(4):300–1.PubMedCrossRefGoogle Scholar
- 101.Harlos MS, Stenekes S, Lambert D, Hohl C, Chochinov HM. Intranasal fentanyl in the palliative care of newborns and infants. J Pain Symptom Manag. 2013;46(2):265–74.CrossRefGoogle Scholar
- 102.Mudd S. Intranasal fentanyl for pain management in children: a systematic review of the literature. J Pediatr Health Care. 2011;25(5):316–22.PubMedCrossRefGoogle Scholar
- 103.Paut O, Camboulives J, Viard L, Lemoing JP, Levron JC. Pharmacokinetics of transdermal fentanyl in the peri-operative period in young children. Anaesthesia. 2000;55(12):1202–7.PubMedCrossRefGoogle Scholar
- 104.Collins JJ, Dunkel IJ, Gupta SK, Inturrisi CE, Lapin J, Palmer LN, et al. Transdermal fentanyl in children with cancer pain: feasibility, tolerability, and pharmacokinetic correlates. J Pediatr. 1999;134(3):319–23.PubMedCrossRefGoogle Scholar
- 105.Lehmann KA, Zech D. Transdermal fentanyl: clinical pharmacology. J Pain Symptom Manag. 1992;7(3 Suppl.):S8–16.CrossRefGoogle Scholar
- 106.Delgado-Charro MB, Guy RH. Effective use of transdermal drug delivery in children. Adv Drug Deliv Rev. 2014;73:63–82.PubMedCrossRefGoogle Scholar
- 107.Zernikow B, Michel E, Anderson B. Transdermal fentanyl in childhood and adolescence: a comprehensive literature review. J Pain. 2007;8(3):187–207.PubMedCrossRefGoogle Scholar
- 108.Greeley WJ, de Bruijn NP, Davis DP. Sufentanil pharmacokinetics in pediatric cardiovascular patients. Anesth Analg. 1987;66(11):1067–72.PubMedCrossRefGoogle Scholar
- 109.Greeley WJ, de Bruijn NP. Changes in sufentanil pharmacokinetics within the neonatal period. Anesth Analg. 1988;67(1):86–90.PubMedCrossRefGoogle Scholar
- 110.Guay J, Gaudreault P, Tang A, Goulet B, Varin F. Pharmacokinetics of sufentanil in normal children. Can J Anaesth. 1992;39(1):14–20.PubMedCrossRefGoogle Scholar
- 111.Meistelman C, Benhamou D, Barre J, Levron JC, Mahe V, Mazoit X, et al. Effects of age on plasma protein binding of sufentanil. Anesthesiology. 1990;72(3):470–3.PubMedCrossRefGoogle Scholar
- 112.Meuldermans WE, Hurkmans RM, Heykants JJ. Plasma protein binding and distribution of fentanyl, sufentanil, alfentanil and lofentanil in blood. Arch Int Pharmacodyn Ther. 1982;257(1):4–19.PubMedGoogle Scholar
- 113.Meuldermans W, Woestenborghs R, Noorduin H, Camu F, van Steenberge A, Heykants J. Protein binding of the analgesics alfentanil and sufentanil in maternal and neonatal plasma. Eur J Clin Pharmacol. 1986;30(2):217–9.PubMedCrossRefGoogle Scholar
- 114.Helmers JH, van Leeuwen L, Zuurmond WW. Sufentanil pharmacokinetics in young adult and elderly surgical patients. Eur J Anaesthesiol. 1994;11(3):181–5.PubMedGoogle Scholar
- 115.Scholz J, Bause H, Schulz M, Klotz U, Krishna DR, Pohl S, et al. Pharmacokinetics and effects on intracranial pressure of sufentanil in head trauma patients. Br J Clin Pharmacol. 1994;38(4):369–72.PubMedPubMedCentralCrossRefGoogle Scholar
- 116.Bartkowska-Sniatkowska A, Bienert A, Wiczling P, Rosada-Kurasinska J, Zielinska M, Warzybok J, et al. Pharmacokinetics of sufentanil during long-term infusion in critically ill pediatric patients. J Clin Pharmacol. 2016;56(1):109–15.PubMedCrossRefGoogle Scholar
- 117.Calvier EA, Krekels EH, Valitalo PA, Rostami-Hodjegan A, Tibboel D, Danhof M, et al. Allometric scaling of clearance in paediatric patients: when does the magic of 0.75 fade? Clin Pharmacokinet. 2017;56(3):273–85.PubMedCrossRefGoogle Scholar
- 118.Nguyen The Tich s, Vecchierini MF, Debillon T, Pereon Y. Effects of sufentanil on electroencephalogram in very and extremely preterm neonates. Pediatrics. 2003;111(1):123–8.PubMedCrossRefGoogle Scholar
- 119.Davis PJ, Stiller RL, Cook DR, Brandom BW, Davin-Robinson KA. Pharmacokinetics of sufentanil in adolescent patients with chronic renal failure. Anesth Analg. 1988;67(3):268–71.PubMedCrossRefGoogle Scholar
- 120.Davis PJ, Cook DR, Stiller RL, Davin-Robinson KA. Pharmacodynamics and pharmacokinetics of high-dose sufentanil in infants and children undergoing cardiac surgery. Anesth Analg. 1987;66(3):203–8.PubMedCrossRefGoogle Scholar
- 121.Kern FH, Ungerleider RM, Jacobs JR, Boyd JL 3rd, Reves JG, Goodman D, et al. Computerized continuous infusion of intravenous anesthetic drugs during pediatric cardiac surgery. Anesth Analg. 1991;72(4):487–92.PubMedCrossRefGoogle Scholar
- 122.Woloszczuk-Gebicka B, Grabowski T, Borucka B, Karas-Trzeciak M. Pharmacokinetics of sufentanil administered with 0.2% ropivacaine as a continuous epidural infusion for postoperative pain relief in infants. Paediatr Anaesth. 2014;24(9):962–7.PubMedCrossRefGoogle Scholar
- 123.Benlabed M, Ecoffey C, Levron JC, Flaisler B, Gross JB. Analgesia and ventilatory response to CO2 following epidural sufentanil in children. Anesthesiology. 1987;67(6):948–51.PubMedCrossRefGoogle Scholar
- 124.Henderson JM, Brodsky DA, Fisher DM, Brett CM, Hertzka RE. Pre-induction of anesthesia in pediatric patients with nasally administered sufentanil. Anesthesiology. 1988;68(5):671–5.PubMedCrossRefGoogle Scholar
- 125.Lundeberg S, Roelofse JA. Aspects of pharmacokinetics and pharmacodynamics of sufentanil in pediatric practice. Paediatr Anaesth. 2011;21(3):274–9.PubMedCrossRefGoogle Scholar
- 126.Karl HW, Keifer AT, Rosenberger JL, Larach MG, Ruffle JM. Comparison of the safety and efficacy of intranasal midazolam or sufentanil for preinduction of anesthesia in pediatric patients. Anesthesiology. 1992;76(2):209–15.PubMedCrossRefGoogle Scholar
- 127.Abrams R, Morrison JE, Villasenor A, Hencmann D, Da Fonseca M, Mueller W. Safety and effectiveness of intranasal administration of sedative medications (ketamine, midazolam, or sufentanil) for urgent brief pediatric dental procedures. Anesth Prog. 1993;40(3):63–6.PubMedPubMedCentralGoogle Scholar
- 128.Zedie N, Amory DW, Wagner BK, O’Hara DA. Comparison of intranasal midazolam and sufentanil premedication in pediatric outpatients. Clin Pharmacol Ther. 1996;59(3):341–8.PubMedCrossRefGoogle Scholar
- 129.Haynes G, Brahen NH, Hill HF. Plasma sufentanil concentration after intranasal administration to paediatric outpatients. Can J Anaesth. 1993;40(3):286.PubMedCrossRefGoogle Scholar
- 130.Nielsen BN, Friis SM, Romsing J, Schmiegelow K, Anderson BJ, Ferreiros N, et al. Intranasal sufentanil/ketamine analgesia in children. Paediatr Anaesth. 2014;24(2):170–80.PubMedCrossRefGoogle Scholar
- 131.Meistelman C, Saint-Maurice C, Lepaul M, Levron JC, Loose JP, Mac Gee K. A comparison of alfentanil pharmacokinetics in children and adults. Anesthesiology. 1987;66(1):13–6.PubMedCrossRefGoogle Scholar
- 132.Roure P, Jean N, Leclerc AC, Cabanel N, Levron JC, Duvaldestin P. Pharmacokinetics of alfentanil in children undergoing surgery. Br J Anaesth. 1987;59(11):1437–40.PubMedCrossRefGoogle Scholar
- 133.Browne BL, Prys-Roberts C, Wolf AR. Propofol and alfentanil in children: infusion technique and dose requirement for total i.v. anaesthesia. Br J Anaesth. 1992;69(6):570–6.PubMedCrossRefGoogle Scholar
- 134.Wiest DB, Ohning BL, Garner SS. The disposition of alfentanil in neonates with respiratory distress. Pharmacotherapy. 1991;11(4):308–11.PubMedGoogle Scholar
- 135.Davis PJ, Killian A, Stiller RL, Cook DR, Guthrie RD, Scierka AM. Pharmacokinetics of alfentanil in newborn premature infants and older children. Dev Pharmacol Ther. 1989;13(1):21–7.PubMedCrossRefGoogle Scholar
- 136.Freid EB, Miles MV, Nocera MA, Zaritsky AL. Prolonged continuous infusions of fentanyl or alfentanil in critically ill children: pharmacokinetics and pharmacodynamics. Anesthesiology. 1994;81(3A):A257-A.Google Scholar
- 137.Davis PJ, Stiller RL, Cook DR, Brandom BW, Davis JE, Scierka AM. Effects of cholestatic hepatic disease and chronic renal failure on alfentanil pharmacokinetics in children. Anesth Analg. 1989;68(5):579–83.PubMedCrossRefGoogle Scholar
- 138.Bjorkman S. Prediction of cytochrome p450-mediated hepatic drug clearance in neonates, infants and children : how accurate are available scaling methods? Clin Pharmacokinet. 2006;45(1):1–11.PubMedCrossRefGoogle Scholar
- 139.Edginton AN, Schmitt W, Willmann S. Development and evaluation of a generic physiologically based pharmacokinetic model for children. Clin Pharmacokinet. 2006;45(10):1013–34.PubMedCrossRefGoogle Scholar
- 140.Salem F, Johnson TN, Abduljalil K, Tucker GT, Rostami-Hodjegan A. A re-evaluation and validation of ontogeny functions for cytochrome P450 1A2 and 3A4 based on in vivo data. Clin Pharmacokinet. 2014;53(7):625–36.PubMedCrossRefGoogle Scholar
- 141.Johnson TN, Rostami-Hodjegan A, Tucker GT. Prediction of the clearance of eleven drugs and associated variability in neonates, infants and children. Clin Pharmacokinet. 2006;45(9):931–56.PubMedCrossRefGoogle Scholar
- 142.Marlow N, Weindling AM, Van Peer A, Heykants J. Alfentanil pharmacokinetics in preterm infants. Arch Dis Child. 1990;65(4 Spec No):349–51.PubMedPubMedCentralCrossRefGoogle Scholar
- 143.Killian A, Davis PJ, Stiller RL, Cicco R, Cook DR, Guthrie RD. Influence of gestational age on pharmacokinetics of alfentanil in neonates. Dev Pharmacol Ther. 1990;15(2):82–5.PubMedCrossRefGoogle Scholar
- 144.Pokela ML, Ryhanen PT, Koivisto ME, Olkkola KT, Saukkonen AL. Alfentanil-induced rigidity in newborn infants. Anesth Analg. 1992;75(2):252–7.PubMedCrossRefGoogle Scholar
- 145.Rodighiero V. Effects of liver disease on pharmacokinetics: an update. Clin Pharmacokinet. 1999;37(5):399–431.PubMedCrossRefGoogle Scholar
- 146.Tegeder I, Lotsch J, Geisslinger G. Pharmacokinetics of opioids in liver disease. Clin Pharmacokinet. 1999;37(1):17–40.PubMedCrossRefGoogle Scholar
- 147.Ferrier C, Marty J, Bouffard Y, Haberer JP, Levron JC, Duvaldestin P. Alfentanil pharmacokinetics in patients with cirrhosis. Anesthesiology. 1985;62(4):480–4.PubMedCrossRefGoogle Scholar
- 148.den Hollander JM, Hennis PJ, Burm AG, Vletter AA, Bovill JG. Pharmacokinetics of alfentanil before and after cardiopulmonary bypass in pediatric patients undergoing cardiac surgery: Part I. J Cardiothorac Vasc Anesth. 1992;6(3):308–12.CrossRefGoogle Scholar
- 149.den Hollander JM, Hennis PJ, Burm AG, Bovill JG. Alfentanil in infants and children with congenital heart defects. J Cardiothorac Anesth. 1988;2(1):12–7.CrossRefGoogle Scholar
- 150.Ross AK, Davis PJ, Dear Gd GL, Ginsberg B, McGowan FX, Stiller RD, et al. Pharmacokinetics of remifentanil in anesthetized pediatric patients undergoing elective surgery or diagnostic procedures. Anesth Analg. 2001;93(6):1393–401.PubMedCrossRefGoogle Scholar
- 151.Staschen CM, Mahmood I. A population pharmacokinetic model of remifentanil in pediatric patients using body-weight-dependent allometric exponents. Drug Metabol Drug Interact. 2013;28(4):231–7.PubMedCrossRefGoogle Scholar
- 152.Rigby-Jones AE, Priston MJ, Sneyd JR, McCabe AP, Davis GI, Tooley MA, et al. Remifentanil-midazolam sedation for paediatric patients receiving mechanical ventilation after cardiac surgery. Br J Anaesth. 2007;99(2):252–61.PubMedCrossRefGoogle Scholar
- 153.Standing JF, Hammer GB, Sam WJ, Drover DR. Pharmacokinetic-pharmacodynamic modeling of the hypotensive effect of remifentanil in infants undergoing cranioplasty. Paediatr Anaesth. 2010;20(1):7–18.PubMedCrossRefGoogle Scholar
- 154.Galinkin JL, Davis PJ, McGowan FX, Lynn AM, Rabb MF, Yaster M, et al. A randomized multicenter study of remifentanil compared with halothane in neonates and infants undergoing pyloromyotomy. II. Perioperative breathing patterns in neonates and infants with pyloric stenosis. Anesth Analg. 2001;93(6):1387–92.PubMedCrossRefGoogle Scholar
- 155.Welzing L, Roth B. Experience with remifentanil in neonates and infants. Drugs. 2006;66(10):1339–50.PubMedCrossRefGoogle Scholar
- 156.Allegaert K. The clinical pharmacology of short acting analgo-sedatives in neonates. Curr Clin Pharmacol. 2011;6(4):222–6.PubMedCrossRefGoogle Scholar
- 157.Stoppa F, Perrotta D, Tomasello C, Cecchetti C, Marano M, Pasotti E, et al. Low dose remifentanyl infusion for analgesia and sedation in ventilated newborns. Miner Anestesiol. 2004;70(11):753–61.Google Scholar
- 158.Kamata M, Tobias JD. Remifentanil: applications in neonates. J Anesth. 2016;30(3):449–60.PubMedCrossRefGoogle Scholar
- 159.Barker N, Lim J, Amari E, Malherbe S, Ansermino JM. Relationship between age and spontaneous ventilation during intravenous anesthesia in children. Paediatr Anaesth. 2007;17(10):948–55.PubMedCrossRefGoogle Scholar
- 160.Davis PJ, Galinkin J, McGowan FX, Lynn AM, Yaster M, Rabb MF, et al. A randomized multicenter study of remifentanil compared with halothane in neonates and infants undergoing pyloromyotomy. I. Emergence and recovery profiles. Anesth Analg. 2001;93(6):1380–6.PubMedCrossRefGoogle Scholar
- 161.Allegaert K, Thewissen L, van den Anker JN. Remifentanil in neonates: a promising compound in search of its indications? Pediatr Neonatol. 2012;53(6):387–8.PubMedCrossRefGoogle Scholar
- 162.Davis PJ, Cladis FP. The use of ultra-short-acting opioids in paediatric anaesthesia: the role of remifentanil. Clin Pharmacokinet. 2005;44(8):787–96.PubMedCrossRefGoogle Scholar
- 163.Marsh DF, Hodkinson B. Remifentanil in paediatric anaesthetic practice. Anaesthesia. 2009;64(3):301–8.PubMedCrossRefGoogle Scholar
- 164.Sammartino M, Garra R, Sbaraglia F, De Riso M, Continolo N. Remifentanil in children. Paediatr Anaesth. 2010;20(3):246–55.PubMedCrossRefGoogle Scholar
- 165.Rothstein P. Remifentanil for neonates and infants: piano, piano con calma. Anesth Analg. 2001;93(6):1370–2.PubMedCrossRefGoogle Scholar
- 166.Welzing L, Ebenfeld S, Dlugay V, Wiesen MH, Roth B, Mueller C. Remifentanil degradation in umbilical cord blood of preterm infants. Anesthesiology. 2011;114(3):570–7.PubMedCrossRefGoogle Scholar
- 167.Norman E, Wikstrom S, Hellstrom-Westas L, Turpeinen U, Hamalainen E, Fellman V. Rapid sequence induction is superior to morphine for intubation of preterm infants: a randomized controlled trial. J Pediatrics. 2011;159(6):893–899 e1.CrossRefGoogle Scholar
- 168.Sammartino M, Garra R, Sbaraglia F, De Riso M, Continolo N, Papacci P. Experience of remifentanil in extremely low-birth-weight babies undergoing laparotomy. Pediatr Neonatol. 2011;52(3):176–9.PubMedCrossRefGoogle Scholar
- 169.Eck JB, Lynn AM. Use of remifentanil in infants. Paediatr Anaesth. 1998;8(5):437–9.PubMedCrossRefGoogle Scholar
- 170.Dershwitz M, Hoke JF, Rosow CE, Michalowski P, Connors PM, Muir KT, et al. Pharmacokinetics and pharmacodynamics of remifentanil in volunteer subjects with severe liver disease. Anesthesiology. 1996;84(4):812–20.PubMedCrossRefGoogle Scholar
- 171.Davis PJ, Wilson AS, Siewers RD, Pigula FA, Landsman IS. The effects of cardiopulmonary bypass on remifentanil kinetics in children undergoing atrial septal defect repair. Anesth Analg. 1999;89(4):904–8.PubMedGoogle Scholar
- 172.Sam WJ, Hammer GB, Drover DR. Population pharmacokinetics of remifentanil in infants and children undergoing cardiac surgery. BMC Anesthesiol. 2009;9:5.PubMedPubMedCentralCrossRefGoogle Scholar
- 173.Freye E. Pharmakokinetik der Opioide: Bedeutung für den praktischen Einsatz. In: Freye E, editor. Opioide in der Medizin. 6th ed. Berlin: Springer; 2004. p. 229–35.CrossRefGoogle Scholar
- 174.Freye E. Opioide im Rahmen der Allgemeinanästhesie. In: Freye E, editor. Opioide in der Medizin. 6th ed. Berlin: Springer; 2004. p. 193–228.CrossRefGoogle Scholar
- 175.Kretz F-J, Schäffer J, Gleiter CH, Krebsbach W, Hindley U, Remppis S. Pharmakologie: Grundlagen und klinisch-praktische Details. In: Kretz F-J, Schäffer J, Gleiter CH, Krebsbach W, Hindley U, Remppis S, editors. Anästhesie Intensivmedizin Notfallmedizin Schmerztherapie. 5th ed. Heidelberg: Springer; 2008. p. 18.Google Scholar
- 176.Peng PW, Sandler AN. A review of the use of fentanyl analgesia in the management of acute pain in adults. Anesthesiology. 1999;90(2):576–99.PubMedCrossRefGoogle Scholar
- 177.Opioide Schäfer M. In: Tonner PH, Hein L, editors. Pharmakotherapie in der Anästhesie und Intensivmedizin. 1st ed. Heidelberg: Springer; 2011. p. 109–30.Google Scholar
- 178.Schäfer M, Zöllner C. Opioide. In: Rossaint R, Werner C, Zwissler B, editors. Die Anästhesiologie: Allgemeine und spezielle Anästhesiologie, Schmerztherapie und Intensivmedizin. 3rd ed. Berlin: Springer; 2012. p. 240.Google Scholar
- 179.Scholz J, Steinfath M, Schulz M. Clinical pharmacokinetics of alfentanil, fentanyl and sufentanil: an update. Clin Pharmacokinet. 1996;31(4):275–92.PubMedCrossRefGoogle Scholar
- 180.Bovill JG, Sebel PS, Blackburn CL, Heykants J. The pharmacokinetics of alfentanil (R39209): a new opioid analgesic. Anesthesiology. 1982;57(6):439–43.PubMedCrossRefGoogle Scholar
- 181.Gillespie TJ, Gandolfi AJ, Maiorino RM, Vaughan RW. Gas chromatographic determination of fentanyl and its analogues in human plasma. J Anal Toxicol. 1981;5(3):133–7.PubMedCrossRefGoogle Scholar
- 182.Michiels M, Hendriks R, Heykants J. A sensitive radioimmunoassay for fentanyl: plasma level in dogs and man. Eur J Clin Pharmacol. 1977;12(2):153–8.PubMedCrossRefGoogle Scholar
- 183.Schuttler J, White PF. Optimization of the radioimmunoassays for measuring fentanyl and alfentanil in human serum. Anesthesiology. 1984;61(3):315–20.PubMedCrossRefGoogle Scholar
- 184.Watts V, Caplan Y. Determination of fentanyl in whole blood at subnanogram concentrations by dual capillary column gas chromatography with nitrogen sensitive detectors and gas chromatography/mass spectrometry. J Anal Toxicol. 1988;12(5):246–54.PubMedCrossRefGoogle Scholar
- 185.Woestenborghs RJ, Stanski DR, Scott JC, Heykants JJ. Assay methods for fentanyl in serum: gas–liquid chromatography versus radioimmunoassay. Anesthesiology. 1987;67(1):85–90.PubMedCrossRefGoogle Scholar
- 186.Koch DE, Isaza R, Carpenter JW, Hunter RP. Simultaneous extraction and quantitation of fentanyl and norfentanyl from primate plasma with LC/MS detection. J Pharm Biomed Anal. 2004;34(3):577–84.PubMedCrossRefGoogle Scholar
- 187.Liu J, Pan H, Gold MS, Derendorf H, Bruijnzeel AW. Effects of fentanyl dose and exposure duration on the affective and somatic signs of fentanyl withdrawal in rats. Neuropharmacology. 2008;55(5):812–8.PubMedCrossRefGoogle Scholar
- 188.Michiels M, Hendriks R, Heykants J. Radioimmunoassay of the new opiate analgesics alfentanil and sufentanil: preliminary pharmacokinetic profile in man. J Pharm Pharmacol. 1983;35(2):86–93.PubMedCrossRefGoogle Scholar
- 189.Heykants J, Woestenborghs R, Timmerman P. Reliability of sufentanil plasma level assays in patients. Anesthesiology. 1986;65(1):112–3.PubMedCrossRefGoogle Scholar
- 190.Fiset P, Mathers L, Engstrom R, Fitzgerald D, Brand SC, Hsu F, et al. Pharmacokinetics of computer-controlled alfentanil administration in children undergoing cardiac surgery. Anesthesiology. 1995;83(5):944–55.PubMedCrossRefGoogle Scholar
- 191.Hynynen M, Takkunen O, Salmenpera M, Haataja H, Heinonen J. Continuous infusion of fentanyl or alfentanil for coronary artery surgery: plasma opiate concentrations, haemodynamics and postoperative course. Br J Anaesth. 1986;58(11):1252–9.PubMedCrossRefGoogle Scholar
- 192.Grosse CM, Davis IM, Arrendale RF, Jersey J, Amin J. Determination of remifentanil in human blood by liquid-liquid extraction and capillary GC-HRMS-SIM using a deuterated internal standard. J Pharm Biomed Anal. 1994;12(2):195–203.PubMedCrossRefGoogle Scholar
- 193.Lessard D, Comeau B, Charlebois A, Letarte L, Davis IM. Quantification of GR90291 in human blood by high resolution gas chromatography-mass selective detection (HRGC-MSD). J Pharm Biomed Anal. 1994;12(5):659–65.PubMedCrossRefGoogle Scholar