Plasma Concentrations of Bupivacaine After Peri-articular Injection in Total Knee Arthroplasty

The recruitment status of this study is unknown because the information has not been verified recently.
Verified July 2012 by Mahidol University.
Recruitment status was  Recruiting
Information provided by (Responsible Party):
Saowaphak Lapmahapaisan, Mahidol University Identifier:
First received: July 5, 2012
Last updated: NA
Last verified: July 2012
History: No changes posted

Patients with knee arthroplasty usually performed under spinal anesthesia with a single-shot femoral nerve block and periarticular block, so we would like to know the plasma concentration of bupivacaine in these patients.

Condition Intervention Phase
Serum Bupivacaine Level
Periarticular Block
Total Knee Arthroplasty
Drug: Bupivacaine
Phase 4

Study Type: Interventional
Study Design: Endpoint Classification: Pharmacokinetics/Dynamics Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Basic Science
Official Title: Plasma Concentrations of Bupivacaine After Spinal Anesthesia With Single Shot Femoral Nerve Block and Peri-articular Injection in Total Knee Arthroplasty

Resource links provided by NLM:

Further study details as provided by Mahidol University:

Primary Outcome Measures:
  • plasma concentration of bupivacaine after spinal anesthesia with single-shot femoral nerve block and periarticular block [ Time Frame: 2 hours ] [ Designated as safety issue: Yes ]

Secondary Outcome Measures:
  • bupivacaine toxicity [ Time Frame: 24 hr ] [ Designated as safety issue: Yes ]

Estimated Enrollment: 43
Study Start Date: July 2012
Estimated Study Completion Date: August 2013
Estimated Primary Completion Date: July 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: bupicavaine Drug: Bupivacaine

20 ml of 0.5% bupivacaine for single-shot femoral nerve block will be done at the beginning then another 20 ml of 0.5% bupivacaine for periarticular block will be performed at the end of operation.

Blood sample will be drawn at 60 min after femoral nerve block and before periarticular block, 15, 30, 45, 60 min after periarticular block.


Ages Eligible for Study:   30 Years to 70 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • age of 30-70 yr
  • ASA I-II
  • patient undergo total knee arthroplasty under spinal block and single shot femoral nerve block and periarticular block

Exclusion Criteria:

  • patient's refusal
  • allergic to bupivacaine
  • body weight less than 50 kg
  • liver disease
  • heart disease
  • coagulopathy
  • Hct<35%
  • infection at both groin
  Contacts and Locations
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Please refer to this study by its identifier: NCT01636869

Contact: Saowaphak Lapmahapaisan, M.D. 662-4197995

Faculty of Medicine, Siriraj Hospital, Mahidol University Recruiting
Bangkok, Thailand, 10700
Contact: Saowaphak Lapmahapaisan, M.D.    662-419-7995   
Principal Investigator: Saowaphak Lapmahapaisan, M.D.         
Sponsors and Collaborators
Mahidol University
  More Information

No publications provided

Responsible Party: Saowaphak Lapmahapaisan, instructor, Mahidol University Identifier: NCT01636869     History of Changes
Other Study ID Numbers: 010/2555
Study First Received: July 5, 2012
Last Updated: July 5, 2012
Health Authority: Thailand: Ethical Committee

Keywords provided by Mahidol University:
bupivacaine level
periarticular block
total knee arthroplasty

Additional relevant MeSH terms:
Anesthetics, Local
Central Nervous System Depressants
Physiological Effects of Drugs
Pharmacologic Actions
Sensory System Agents
Peripheral Nervous System Agents
Central Nervous System Agents
Therapeutic Uses processed this record on July 23, 2014