Articles: analgesia.
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Cahiers d'anesthésiologie · Jan 1991
Review[The use of opioids by the regional route in obstetrics].
Epidural and spinal administration of opioids in obstetrics can be used during labour and for cesarean section. Although these routes of administration are of limited use when opiates are employed as sole agents, the association with local anesthetics may improve the characteristics of analgesia. The administration of a local anesthetic-opiate mixture allows a reduction of the total amount of local anesthetics, thus reducing the incidence of maternal hypotension and the percentage of instrumental extraction. ⋯ Opioids may also be used for postoperative analgesia after cesarean section. Since they could be responsible for an opioid-related respiratory depression in the mother and the neonate, a strict supervision is absolutely necessary following this particular mode of administration of opiates. If human and technical means of supervision failed to bring into operation, it would be better not to use opioids by the spinal route in such a context.
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Annales de chirurgie · Jan 1991
Randomized Controlled Trial Clinical Trial[Prolonged epidural analgesia following thoracotomy. Clinical study and serum levels over five days].
Prolonged continuous epidural analgesia allows perithecal infusion with fentanyl and bupivacaine for 5 postoperative days after thoracic surgery. This study included 27 thoracotomized patients randomised into two groups: group X consisted of 15 subjects, group Y consisted of 12 subjects. Each patient received 33 micrograms/hr or fentanyl for 48 hours, associated with 0.25% bupivacaine in group X, and 0.125% bupivacaine in group Y. ⋯ Mean fentanyl levels did not increase beyond 0.8 ng/ml. The use of 0.125% bupivacaine improved the margin of safety but did not impair clinical analgesia in the study. This method provides good analgesia for thoracotomized patients.
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Cahiers d'anesthésiologie · Jan 1991
[Peridural obstetrical analgesia and the cicatricial uterus. A 4-year evaluation].
191 women with previous cesarean section in 291 indexed between October 1985 and September 1989 underwent a trial of labor. 146 patients received epidural analgesia in the course of labor. Vaginal delivery occurred in 126 patients (86.3%). Duration for epidural analgesia in labour was 163 +/- 110 min. ⋯ We report four uterine dehiscences and one rupture. In no case, epidural analgesia did not delay the diagnosis. The use of epidural analgesia for trial of labor in previous cesarean section did not increase maternal or fetal risk.
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Veterinary surgery : VS · Jan 1991
Randomized Controlled Trial Comparative Study Clinical TrialAnalgesia in dogs after intercostal thoracotomy. A comparison of morphine, selective intercostal nerve block, and interpleural regional analgesia with bupivacaine.
Three postoperative analgesic protocols were assigned randomly to 24 healthy dogs after thoracotomy at the left fourth intercostal space. Morphine was administered parenterally to eight dogs after tracheal extubation; selective intercostal nerve blocks with bupivacaine hydrochloride and epinephrine were administered to eight dogs before closure of the thorax; and bupivacaine hydrochloride and epinephrine were administered through an interpleural catheter to eight dogs after tracheal extubation. Heart rate, respiratory rate, rectal temperature, hematocrit, plasma protein, blood gas, and pain score evaluations were recorded before surgery and 30 minutes, 1 hour, 2 hours, and 3 hours after extubation. ⋯ Bupivacaine was easily readministered through an interpleural catheter. Respiratory compromise was less in dogs treated with bupivacaine than in dogs treated with morphine. After intercostal thoracotomy, interpleural bupivacaine provided prolonged analgesia with fewer blood gas alterations than morphine.
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Patient controlled analgesia (PCA) is a drug delivery system aimed to control acute pain using negative feedback technology in a closed loop system in which the patient plays an active role. It overcomes the inadequacies of traditional analgesic protocols due to marked differences in pharmacokinetic and dynamy of analgesis between patients. Moreover, doctors and nurses frequently underprescribe opioids in patients with severe pain for fear of dangerous side-effects. ⋯ The principles of demand analgesia are now being investigated using other agents, such as local anaesthetics, and other routes of administration, mainly epidural injection. In most patients, even in children, PCA can replace intramuscular injections, which are the standard route for opioid administration. Today PCA and spinal opioids are the two main methods of analgesia for postoperative pain management.