The Effect of the Popliteal Plexus Block on Postoperative Pain After Reconstruction of the Anterior Cruciate Ligament
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- University of Aarhus
- Enrollment
- 15
- Locations
- 2
- Primary Endpoint
- The effect of the popliteal plexus block (PPB)
Study Overview
Brief Summary
The study aims to investigate the effect of the popliteal plexus block (PPB) on postoperative pain in patients undergoing anterior cruciate ligament (ACL) reconstruction.
Detailed Description
Postoperative pain following ACL reconstruction can be alleviated with an ultrasound-guided femoral triangle block (FTB). However, it is the investigators' observation that 10-20 % of the patients still complain of intense pain localized in the center of the knee.
Cadaver dissection studies have shown that an injection into the distal part of the adductor canal will spread to the popliteal fossa, and one dissection study showed consistent spread to the popliteal plexus.
The study team hypothesized that a PPB will reduce the postoperative pain, when it is used as a supplement to the FTB in patients undergoing ACL reconstruction.
Study Design
- Study Type
- Interventional
- Allocation
- Non Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Treatment
- Masking
- None
Eligibility Criteria
- Ages
- 18 Years to — (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •Patients undergoing ACL reconstruction on one of the two trial sites
- •American Society of Anesthesiologists (ASA) status I-III
- •Informed consent
Exclusion Criteria
- •Patients unable to cooperate
- •Patients not able to speak Danish or with other communication problems
- •Pregnancy
- •Contraindication towards any medical product used in the study
- •Preoperatively reduced sensation on the medial and lateral part of the lower leg
- •Patients with diabetes requiring medical treatment
- •Preoperative intake of opioids (dosed > once daily)
- •ACL revision
Arms & Interventions
Patients with postoperative pain, NRS ≤ 3
(approx. 90 patients)
Patients with postoperative pain, NRS >3
Patients reporting postoperative pain (NRS >3) localized to the center of the knee (10 patients) will receive a popliteal plexus block
Intervention: Popliteal plexus block (Procedure)
Outcomes
Primary Outcomes
The effect of the popliteal plexus block (PPB)
Time Frame: Pain scores (NRS): 15, 30, 45 and 60 minutes after PPB
Evaluated as the percentage of patients with postoperative pain NRS \>3, dropping in pain score to NRS ≤ 3 after the PPB
Secondary Outcomes
- Onset time for PPB(Pain scores (NRS): 15, 30, 45 and 60 minutes after PPB)
- The effect of the PPB on cutaneous sensation(Baseline, 30 and 60 minutes after PPB)
- The effect of the PPB on muscle strength(Baseline, 60 minutes after PPB)
- Percentage of patients with central knee pain(Pain scores: 15, 30, 45 and 60 minutes after arrival at the post anesthesia care unit (PACU))