This study was conducted to compare the effects of intrathecal versus intravenous dexmedetomidine administration in patients undergoing Transurethral resection of the prostate under spinal anesthesia.
Multiple prostatic pathologies become evident in the elderly males. Of them, benign prostatic hyperplasia is one of the most prevalent issues in aging men and transurethral resection of the prostate (TURP) still represents the standard surgical treatment. Most transurethral resection of the prostate (TURP) procedures are performed under spinal anesthesia. Spinal anesthesia has many advantages including, easy application, low cost, decreasing the risk of aspiration, decreasing intraoperative bleeding, eliminating the need for mechanical ventilation together with the decreased risk of intraoperative cardiac events or post-operative hypoxic episode. The management of post-operative pain following spinal anesthesia using a short-acting anesthetic still constitutes a major problem for anesthesiologists and pain physicians. However, the duration and efficacy of spinal anesthesia could be improved by adjuvants. Dexmedetomidine is an alpha 2 receptor agonist that have antinociceptive action for both visceral and somatic pain. At low doses, it has sedative and hypnotic effects without having a negative impact on respiration. Multiple studies have reported that intrathecal and intravenous administration of this drug could prolong the duration of spinal anesthesia and post-operative analgesia.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
75
The cases will be subjected to spinal anesthesia with a 3 ml volume (2.5 ml of hyperbaric bupivacaine 10 mg in addition to 0.5 normal saline). 50 ml of normal saline was infused over a ten-minute period, followed by 200 ml infusion till the end of operation.
The cases will be subjected to the same anesthetic mixture as controls with adding dexmedetomidine 5 μg in the saline component. 50 ml of normal saline was infused over a ten-minute period, followed by 200 ml infusion till the end of operation.
The intravenous group will receive 2.5 ml of hyperbaric bupivacaine (10 mg), in addition to intravenous dexmedetomidine, which will be started at 1 μg/kg loading dose diluted in 50 ml saline administered within 10 min, followed by maintenance at a 0.4 μg/kg/h dose diluted in 200 ml saline till the end of the procedure.
Surgical Intensive Care and Pain Medicine Department, Faculty of Medicine, Tanta University, Tanta, Egypt
Tanta, ElGharbia, Egypt
RECRUITINGTime to first analgesic request
Time to first analgesic request will be recorded
Time frame: 24 hours postoperatively
The onset of sensory
Time to reach T7 sensory block will be recorded
Time frame: 24 hours Postoperatively
The degree of motor block
The degree of motor block will be assessed using the modified Bromage Score. Grade 0 No motor block Grade 1 Inability to raise extended leg, able to move knees and feet Grade 2 Inability to raise extended leg and move knee, able to move feet Grade 3 Complete motor block of the lower limbs.
Time frame: 24 hours Postoperatively
Sedation level
Patients level of sedation will be assessed via Ramsay sedation score. This score is numbered from 1 to 6, based on patient responsiveness.
Time frame: Intraoperativley
Total analgesic requirements
Total analgesic requirements will be recorded
Time frame: 48 hours Postoperatively
The incidence of side effects
The incidence of side effects including (bradycardia, hypotension, nausea, vomiting, and pruritis) will be recorded..
Time frame: 48 hours Postoperatively
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