The study evaluates the effectiveness of anterior quadratus lumborum block for post operative analgesia after hip arthroplasty. Half of the participants will receive ultrasound guided anterior quadratus lumborum block using 30ml bupivacaine 0.375%, while the other half will not receive the block ( control group).
Sensory innervation of the hip region involves branches of the lumbar plexus and sacral plexus. Effective post operative analgesia can be approached by blocking the lumbar plexus at the level of the quadratus lumborum muscle. Quadratus lumborum block has several approach methods (anterior, lateral, posterior, and intramuscular). Anterior quadratus lumborum block also known as transmuscular QL block or QL3, the local anaesthetic (30ml of bupivacaine 0.375%) is injected between the psoas major muscle (PM) and the quadratus lumborum muscle (QL). Therefore, the anterior quadratus lumborum block may generate analgesia from T10 to L4 covering the sensory innervation of the hip region.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
90
Local anaesthetic will be injected in the fascial plane between psoas major muscle and quadratus lumborum muscle.
Alexandria faculty of medicine
Alexandria, Egypt
RECRUITINGPain intensity assessment
Patients will be trained to use visual analogue scale which consists of 10cm line, 0 cm equivalent to no pain and 10 cm denoting the worst imaginable pain.
Time frame: every hour for the first 4 post operative hours and then every 4 hours for the rest of the 24 post operative hours.
Total amount of post operative morphine (mg).
Total amount of post operative morphine (mg) used as rescue analgesia and the first time of its request.
Time frame: any time in the first 24 post operative hours.
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