Author/Authors :
Abrishamkar, Saied Department of Neurosurgery - School of Medicine, Isfahan University of Medical Sciences, Isfahan , Torkashvand, Mostafa Department of Neurosurgery - School of Medicine and Student Research Committee, Isfahan University of Medical Sciences, Isfahan , borujeni, Arash Momeni Student of Master - School of Biomaterial (Drug Delivery System), Amirkabir University of Technology, Tehran , Borujeni, Amir Momeni General Practitioner - School of Medicine, Isfahan University of Medical Sciences, Isfahan , Rezvani, Majid Department of Neurosurgery - School of Medicine, Isfahan University of Medical Sciences, Isfahan , Tabesh, Homayon Department of Neurosurgery - School of Medicine, Isfahan University of Medical Sciences, Isfahan , Rahmani, Payman Department of Neurosurgery - School of Medicine and Student Research Committee, Isfahan University of Medical Sciences, Isfahan , Rafei, Ahmadreza Department of Neurosurgery - School of Medicine and Student Research Committee, Isfahan University of Medical Sciences, Isfahan , Eshraghi, Norolah Department of Neurosurgery - School of Medicine and Student Research Committee, Isfahan University of Medical Sciences, Isfahan , Nikbakht, Hosain Department of Neurosurgery - School of Medicine and Student Research Committee, Isfahan University of Medical Sciences, Isfahan
Abstract :
Lumbar disc herniation (LDH) is the most common surgical intervention of spine surgery. During few days of
the operation, most patients experience worrying low back pain (LBP) and radicular leg pain (RLP). Applying liquid form of bupivacaine
in the vicinity of surgical field could be effective on pain relief only for few hours after operation. METHODS: In a doubleblind
prospective randomized clinical trial on patients with single level lumbar disc herniation (LDH), we tried to show the efficacy
of N-Methyl-2Pyrolidone-Ethyl heptanoate (PLGA)-bupivacaine on LBP and RLP of 38 patients with American Society of Anesthesiologists
(ASA) physical status I, and aged 27-65 years old.At the end of operation, 1 cc of PLGA-bupivacaine or pure PLGA was
inoculated at the vicinity of thecal sac and root. LBP and RLP were measured using McGill Pain Questionnaire and visual analogue
scale (VAS), immediately after operation and then after 6, 12 and 24 hours as well as one week and one month. RESULTS: The
mean pain severity of LBP in PLGA-bupivacaine group (A) and pure PLGA group (B) were 25.7 ± 2.8 and 30.6±5.8 (p < 0.001),
one week after surgery and 23.1 ± 1.4 and 25.2±2 (p < 0.002), after two weeks, respectively. After 4 weeks of operation, the severity
of LBP were 22.3 ± 1.6 and 22.9 ± 1 in two groups respectively (p = 0.01). Severity of RLP according to VAS, from preoperative intervention
until one month later, did not show any significant differences between two groups before and up to the first week after
operation. However, after the first week until the end of follow-up, group A showed better scores in VAS. CONCLUSIONS:
Accordingly, application of bupivacaine-PLGA had significant effect on LBP especially two weeks after operation, but it did not
have any additional positive effects on RLP.
