Abstract:
BACKGROUND:The purpose of this study was to determine whether combination of 1-5 microg intrathecal neostigmine would enhance analgesia from a fixed intrathecal dose of morphine. METHODS:A total of 60 patients undergoing gynecologic surgery were randomized to one of five groups. Patients received 15 mg bupivacaine plus 2 ml of the test drug intrathecally (saline, 100 microg morphine, or 1-5 microg neostigmine). The control group received spinal saline as the test drug. The morphine group received spinal morphine as test drug. The morphine + 1 microg neostigmine group received spinal morphine and 1 microg neostigmine. The morphine + 2.5 microg neostigmine group received spinal morphine and 2.5 microg neostigmine. Finally, the morphine + 5 microg neostigmine group received spinal morphine and 5 microg neostigmine. RESULTS:The groups were demographically similar. The time to first rescue analgesic (minutes) was longer for all patients who received intrathecal morphine combined with 1-5 microg neostigmine (median, 6 h) compared with the control group (median, 3 h) (P < 0.02). The morphine group (P < 0.05) and the groups that received the combination of 100 microg intrathecal morphine combined with neostigmine (P < 0.005) required less rescue analgesics in 24 h compared with the control group. The incidence of perioperative adverse effects was similar among groups (P > 0.05). CONCLUSIONS:The addition of 1-5 microg spinal neostigmine to 100 microg morphine doubled the duration to first rescue analgesic in the population studied and decreased the analgesic consumption in 24 h, without increasing the incidence of adverse effects. The data suggest that low-dose spinal neostigmine may improve morphine analgesia.
journal_name
Anesthesiologyjournal_title
Anesthesiologyauthors
Almeida RA,Lauretti GR,Mattos ALdoi
10.1097/00000542-200302000-00031subject
Has Abstractpub_date
2003-02-01 00:00:00pages
495-8issue
2eissn
0003-3022issn
1528-1175pii
00000542-200302000-00031journal_volume
98pub_type
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