Transversus Abdominis Plane (TAP) Block for Cesarean Section (CLOTAP)
21 september 2017 uppdaterad av: Laurent Bollag, University of Washington
The purpose of this study is to determine whether a transversus abdominis plane (TAP) block with Clonidine added to the injectate (Clo-TAP) performed approximately 2hrs after the cesarean section (CS) will decrease the amount of postoperative hyperalgesia and ultimately reduce post-CS chronic pain.
Studieöversikt
Status
Avslutad
Betingelser
Intervention / Behandling
Detaljerad beskrivning
Acute severe pain after cesarean section (CS) occurs more often than is thought and 10-15% of the women having a cesarean section develop chronic pain (Kehlet et al. 2006). With over 1.3 million cesarean deliveries per year in the US, this is bound to create a significant health problem. One way to address this health burden is to refine techniques that may help control the pain women experience after CS and ultimately reduce the potential to develop chronic pain.
The purpose of this randomized, double-blinded study is to evaluate the ability of an established anesthetic technique called the transversus abdominis plane (TAP) block to reduce the amount of hyperalgesia women develop around their incision after CS. Measuring the amount of punctuate mechanical hyperalgesia is used as a tool to assess postoperative central sensitization (Lavand'homme et al. 2005), which contributes to postoperative acute pain. Since postoperative acute pain has been shown to be predictive of developing postoperative chronic pain (Eisenach et al. 2008; Yarnitsky et al. 2008), an effective TAP block could help diminish the incidence of chronic pain after CS. In addition, blood samples will be collected for future genetic analysis and we will test preoperatively for mechanical temporal summation (mTS) to evaluate CNS (central nervous system) sensitization and nociceptive system hyperexcitability and see if this correlates with the amount of hyperalgesia women develop around their incision after surgery.
The primary aim of this study is to evaluate the benefits of two different solutions injected by TAP block technique on postoperative peri-incisional hyperalgesia.
Studietyp
Interventionell
Inskrivning (Faktisk)
90
Fas
- Inte tillämpbar
Kontakter och platser
Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.
Studieorter
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São Paulo, Brasilien, 04103-080
- Hospital e Maternidade Santa Joana
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Washington
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Seattle, Washington, Förenta staterna, 98195
- University of Washington
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Deltagandekriterier
Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.
Urvalskriterier
Åldrar som är berättigade till studier
18 år till 45 år (Vuxen)
Tar emot friska volontärer
Nej
Kön som är behöriga för studier
Kvinna
Beskrivning
Inclusion Criteria:
- non-laboring women who will benefit from and have clinically consented to a scheduled or non-scheduled cesarean delivery under spinal anesthesia
- English speaking (UW Site) or Portuguese speaking (Brazil site)
- aged between 18 and 45 years
- BMI < 40
- ASA physical status class I or II
Exclusion Criteria:
- laboring women undergoing a non-scheduled cesarean delivery
- non-English speaking (UW Site) or non-Portuguese speaking (Brazil site)
- previous spinal surgery
- contraindications for neuraxial anesthesia
- allergy to local anesthetic, ultrasound conduction gel, or Clonidine
- history of chronic pain
- inability to receive intraoperative Toradol
Studieplan
Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Förebyggande
- Tilldelning: Randomiserad
- Interventionsmodell: Parallellt uppdrag
- Maskning: Dubbel
Vapen och interventioner
Deltagargrupp / Arm |
Intervention / Behandling |
|---|---|
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Placebo-jämförare: Placebo
Sterile Saline used for TAP block = Bupivacaine Placebo + Clonidine Placebo
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2 x 20mL 0.9% NaCl
Andra namn:
2 x 1mL 0.9% NaCl
Andra namn:
|
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Aktiv komparator: TAP (Bupi)
2x20mL 0.375% Bupivacaine + 2x1mL of 0.9% NaCl = 150mg Bupivacaine + Clonidine Placebo
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2 x 1mL 0.9% NaCl
Andra namn:
2 x 20mL 0.375% Bupivacaine = 150 mg Bupivacaine
Andra namn:
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Aktiv komparator: Clo-TAP (Bupi + Clon)
2x20mL 0.375% Bupivacaine + 2x1mL Clonidine = 150mg Bupivacaine + 150µg Clonidine
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2 x 20mL 0.375% Bupivacaine = 150 mg Bupivacaine
Andra namn:
2 x 1ml Clonidine = 150 µg Clonidine
Andra namn:
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Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
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Wound Hyperalgesia Index (WHA) Assessed 48 Hrs After Block Placement in the Different Groups
Tidsram: 48hrs after CS
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Determine which of three different TAP formulations (Placebo, TAP, Clo-TAP) has the most beneficial effect on the postoperative area of hyperalgesia 48hrs after the start of the cesarean section.
The smaller the area of WHA, assessed in cm2, the better the outcome.
Area sizes may range from 0 to any size.
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48hrs after CS
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Samarbetspartners och utredare
Det är här du hittar personer och organisationer som är involverade i denna studie.
Sponsor
Utredare
- Huvudutredare: Laurent Bollag, MD, University of Washington
- Studiestol: Ruth Landau, MD, University of Washington
Publikationer och användbara länkar
Den som ansvarar för att lägga in information om studien tillhandahåller frivilligt dessa publikationer. Dessa kan handla om allt som har med studien att göra.
Allmänna publikationer
- McDonnell JG, Curley G, Carney J, Benton A, Costello J, Maharaj CH, Laffey JG. The analgesic efficacy of transversus abdominis plane block after cesarean delivery: a randomized controlled trial. Anesth Analg. 2008 Jan;106(1):186-91, table of contents. doi: 10.1213/01.ane.0000290294.64090.f3.
- Kehlet H, Jensen TS, Woolf CJ. Persistent postsurgical pain: risk factors and prevention. Lancet. 2006 May 13;367(9522):1618-25. doi: 10.1016/S0140-6736(06)68700-X.
- McDonnell JG, O'Donnell BD, Farrell T, Gough N, Tuite D, Power C, Laffey JG. Transversus abdominis plane block: a cadaveric and radiological evaluation. Reg Anesth Pain Med. 2007 Sep-Oct;32(5):399-404. doi: 10.1016/j.rapm.2007.03.011.
- McCartney CJ, Duggan E, Apatu E. Should we add clonidine to local anesthetic for peripheral nerve blockade? A qualitative systematic review of the literature. Reg Anesth Pain Med. 2007 Jul-Aug;32(4):330-8. doi: 10.1016/j.rapm.2007.02.010.
- Nikolajsen L, Sorensen HC, Jensen TS, Kehlet H. Chronic pain following Caesarean section. Acta Anaesthesiol Scand. 2004 Jan;48(1):111-6. doi: 10.1111/j.1399-6576.2004.00271.x.
- Weissman-Fogel I, Granovsky Y, Crispel Y, Ben-Nun A, Best LA, Yarnitsky D, Granot M. Enhanced presurgical pain temporal summation response predicts post-thoracotomy pain intensity during the acute postoperative phase. J Pain. 2009 Jun;10(6):628-36. doi: 10.1016/j.jpain.2008.12.009. Epub 2009 Apr 23.
- Yarnitsky D, Crispel Y, Eisenberg E, Granovsky Y, Ben-Nun A, Sprecher E, Best LA, Granot M. Prediction of chronic post-operative pain: pre-operative DNIC testing identifies patients at risk. Pain. 2008 Aug 15;138(1):22-28. doi: 10.1016/j.pain.2007.10.033. Epub 2008 Jan 8.
- Lavand'homme P, De Kock M, Waterloos H. Intraoperative epidural analgesia combined with ketamine provides effective preventive analgesia in patients undergoing major digestive surgery. Anesthesiology. 2005 Oct;103(4):813-20. doi: 10.1097/00000542-200510000-00020.
- Lavand'homme P. Postcesarean analgesia: effective strategies and association with chronic pain. Curr Opin Anaesthesiol. 2006 Jun;19(3):244-8. doi: 10.1097/01.aco.0000192815.22989.61.
- Mendez R, Eisenach JC, Kashtan K. Epidural clonidine analgesia after cesarean section. Anesthesiology. 1990 Nov;73(5):848-52. doi: 10.1097/00000542-199011000-00009.
- Eisenach JC, De Kock M, Klimscha W. alpha(2)-adrenergic agonists for regional anesthesia. A clinical review of clonidine (1984-1995). Anesthesiology. 1996 Sep;85(3):655-74. doi: 10.1097/00000542-199609000-00026. No abstract available.
- Duma A, Urbanek B, Sitzwohl C, Kreiger A, Zimpfer M, Kapral S. Clonidine as an adjuvant to local anaesthetic axillary brachial plexus block: a randomized, controlled study. Br J Anaesth. 2005 Jan;94(1):112-6. doi: 10.1093/bja/aei009. Epub 2004 Oct 29.
- Pan PH, Coghill R, Houle TT, Seid MH, Lindel WM, Parker RL, Washburn SA, Harris L, Eisenach JC. Multifactorial preoperative predictors for postcesarean section pain and analgesic requirement. Anesthesiology. 2006 Mar;104(3):417-25. doi: 10.1097/00000542-200603000-00007.
- Lavand'homme PM, Roelants F, Waterloos H, De Kock MF. Postoperative analgesic effects of continuous wound infiltration with diclofenac after elective cesarean delivery. Anesthesiology. 2007 Jun;106(6):1220-5. doi: 10.1097/01.anes.0000267606.17387.1d.
- Lavand'homme P. Perioperative pain. Curr Opin Anaesthesiol. 2006 Oct;19(5):556-61. doi: 10.1097/01.aco.0000245284.53152.1f.
- Marhofer P, Greher M, Kapral S. Ultrasound guidance in regional anaesthesia. Br J Anaesth. 2005 Jan;94(1):7-17. doi: 10.1093/bja/aei002. Epub 2004 Jul 26.
- Buchanan ML, Easterling TR, Carr DB, Shen DD, Risler LJ, Nelson WL, Mattison DR, Hebert MF. Clonidine pharmacokinetics in pregnancy. Drug Metab Dispos. 2009 Apr;37(4):702-5. doi: 10.1124/dmd.108.024984. Epub 2008 Dec 30.
- Carvalho B, Angst MS, Fuller AJ, Lin E, Mathusamy AD, Riley ET. Experimental heat pain for detecting pregnancy-induced analgesia in humans. Anesth Analg. 2006 Nov;103(5):1283-7. doi: 10.1213/01.ane.0000239224.48719.28.
- Gabriel JS, Gordin V. Alpha 2 agonists in regional anesthesia and analgesia. Curr Opin Anaesthesiol. 2001 Dec;14(6):751-3. doi: 10.1097/00001503-200112000-00024.
- Landau R, Schiffer E, Morales M, Savoldelli G, Kern C. The dose-sparing effect of clonidine added to ropivacaine for labor epidural analgesia. Anesth Analg. 2002 Sep;95(3):728-34, table of contents. doi: 10.1097/00000539-200209000-00036.
- Lavand'homme PM, Roelants F, Waterloos H, Collet V, De Kock MF. An evaluation of the postoperative antihyperalgesic and analgesic effects of intrathecal clonidine administered during elective cesarean delivery. Anesth Analg. 2008 Sep;107(3):948-55. doi: 10.1213/ane.0b013e31817f1595.
- McDonnell JG, Laffey JG. Transversus abdominis plane block. Anesth Analg. 2007 Sep;105(3):883. doi: 10.1213/01.ane.0000268542.45107.79. No abstract available.
- Ohel I, Walfisch A, Shitenberg D, Sheiner E, Hallak M. A rise in pain threshold during labor: a prospective clinical trial. Pain. 2007 Nov;132 Suppl 1:S104-S108. doi: 10.1016/j.pain.2007.05.007. Epub 2007 Jun 20.
- Parker RK, Connelly NR, Lucas T, Serban S, Pristas R, Berman E, Gibson C. Epidural clonidine added to a bupivacaine infusion increases analgesic duration in labor without adverse maternal or fetal effects. J Anesth. 2007;21(2):142-7. doi: 10.1007/s00540-006-0476-8. Epub 2007 May 30.
Studieavstämningsdatum
Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.
Studera stora datum
Studiestart
1 november 2009
Primärt slutförande (Faktisk)
1 augusti 2010
Avslutad studie (Faktisk)
1 augusti 2012
Studieregistreringsdatum
Först inskickad
16 november 2009
Först inskickad som uppfyllde QC-kriterierna
16 november 2009
Första postat (Uppskatta)
18 november 2009
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
23 oktober 2017
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
21 september 2017
Senast verifierad
1 september 2017
Mer information
Termer relaterade till denna studie
Ytterligare relevanta MeSH-villkor
- Sjukdomar i nervsystemet
- Neurologiska manifestationer
- Sensationsstörningar
- Somatosensoriska störningar
- Hyperalgesi
- Läkemedels fysiologiska effekter
- Adrenerga medel
- Neurotransmittormedel
- Molekylära mekanismer för farmakologisk verkan
- Antihypertensiva medel
- Depressiva medel i centrala nervsystemet
- Autonoma agenter
- Agenter från det perifera nervsystemet
- Analgetika
- Sensoriska systemagenter
- Bedövningsmedel
- Adrenerga alfa-2-receptoragonister
- Adrenerga alfa-agonister
- Adrenerga agonister
- Anestesimedel, lokal
- Sympatolytika
- Bupivakain
- Klonidin
Andra studie-ID-nummer
- 36707
Plan för individuella deltagardata (IPD)
Planerar du att dela individuella deltagardata (IPD)?
NEJ
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