The purpose of this study is to determine whether Adductor-Canal-Blockade is effective at reducing pain and morphine consumption after revision knee arthroplasty.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
36
US-guided Adductor-Canal-Blockade with ropivacaine 7,5 mg/ml
US-guided Adductor-Canal-blockade with saline
Department of Anaesthesia and Surgery, HOC, Rigshospitalet, Denmark
Copenhagen, København Ø, Denmark
Pain during 45 degrees active flexion of the knee
0-100 mm at a visual analogue scale (VAS), at 4 hours postoperative.
Time frame: 4 hours postoperative
Pain during 45 degrees active flexion of the knee
0-100 mm at a visual analogue scale (VAS), registered at the intervals 1, 2, 4, 6 and 8 hours postoperative, calculated as "the area under the curve" (AUC) for the interval 1-8 hours postoperative.
Time frame: 1-8 hours postoperative
Pain during 45 degrees active flexion of the knee
0-100 mm at a visual analogue scale (VAS), at 24 hours postoperative.
Time frame: 24 hours postoperative
Pain during rest
0-100 mm at a visual analogue scale (VAS), registered at the intervals 1, 2, 4, 6 and 8 hours postoperative, calculated as "the area under the curve" (AUC) for the interval 1-8 hours postoperative.
Time frame: 1-8 hours postoperative
Pain during rest
0-100 mm at a visual analogue scale (VAS), at 24 hours postoperative.
Time frame: 24 hours postoperative
Total morphine consumption
Total morphine consumption at the intervals 0-8, 8-24 and 0-24 hours postoperative.
Time frame: 0-24 hours postoperative
Postoperative nausea
Nausea scores(0-3)registered at 1,2,4,6 and 8 hours postoperative, calculated as mean value for the interval 1-8 hours postoperative.
Time frame: 1-8 hours postoperative
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Postoperative nausea
Nausea score(0-3)at 24 hours postoperative.
Time frame: 24 hours postoperative
Postoperative vomiting
Number of vomiting episodes at the intervals 0-8, 8-24 and 0-24 hours postoperative.
Time frame: 0-24 hours postoperative
Zofran consumption
Total zofran consumption at the intervals 0-8, 8-24 and 0-24 hours postoperative.
Time frame: 0-24 hours postoperative
Sedation
Sedation score (0-3) registered at 1,2,4,6 and 8 hours postoperative, calculated as the mean value for the interval 1-8 hours postoperative.
Time frame: 1-8 hours postoperative
Sedation
Sedation score (0-3) at 24 hours postoperative.
Time frame: 24 hours postoperative