Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0344307 (analgesia)
28,200 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Ninety-two adult patients scheduled for automated percutaneous discectomy (PERC) were assigned to receive either local anesthesia supplemented with monitored i.v. analgesia (MIVA) or general endotracheal anesthesia (GA-LITE). Patients were examined 1 week post-PERC for the presence of new paresthesias, and they completed a questionnaire 6-18 weeks after PERC about changes in their pain. Sixty-four percent of MIVA patients and 83% of GA-LITE patients had diminished pain following PERC. Results did not show any difference between the two groups for new paresthesias after PERC. There were no differences in postoperative pain medication requirements, but the GA-LITE group reported more postoperative nausea, vomiting, and sore throat. GA-LITE patients averaged 1.06 +/- 0.3 h in the recovery room compared with 0.70 +/- 0.3 h for MIVA patients. Although the use of general anesthesia for PERC has been contraindicated because of fear of damaging the nerve root in the sleeping patient, we conclude that general anesthesia does not increase nerve injuries attributable to instrumentation. However, general anesthesia did cause a higher incidence of minor complications such as nausea, vomiting, and sore throat in the immediate postoperative period than did MIVA.
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PMID:Local versus general anesthesia for lumbar percutaneous discectomy. 849 Mar 15

Interscalene block can induce by itself anesthesia for shoulder surgery, if the opening does not reach the delto-pectoral site nor the shoulder-blade, but medical indications must be thoroughly talked over on account of the risk of phrenic paralysis with patients suffering from breezing trouble, and the surgical position that may disturb the anesthesiologist in case he has to increase anesthesia. A superficial cervical plexus block is required in anesthesia of the upper part of the shoulder. Regional anesthesia is quite useful too as a complement to general anesthesia, for it provides excellent postsurgical analgesia. A catheter may be inserted at the end of the surgical process through a nerve stimulator, but the patient does not tolerate it long, its efficiency greatly diminishes after the first day, and paresthesias may occur as after-effects. Today we prefer set interscalene block before the patient is anaesthetized, searching for paresthesias with a thin needle: this process does not take long to install, it is relatively painless and provides excellent analgesia during the per and post-surgical period, until the next day with long acting local anesthetics. Not any complication happened in fifty patients for one year.
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PMID:[Loco-regional anesthesia and orthopedic surgery of the shoulder]. 850 44

We have assessed prospectively the time to readiness for surgery following axillary block (sum of block performance and latency times) in 80 patients. The brachial plexus was identified using a nerve stimulator, and anaesthetized with 45 mL of mepivacaine 1% with adrenaline 5 micrograms mL-1. In group 1 (single injection) the whole volume of mepivacaine was injected after locating only one of the plexus nerves. In group 2 (multiple injections) at least three plexus nerves were located, and the volume of mepivacaine was divided between them. Sensory block was assessed by a blinded observer every 10 min. Patchy analgesia was supplemented after electrolocating the unblocked nerves after 20, 30 or 40 min. The patient was pronounced ready for surgery when analgesia was present in all areas to be operated upon, which always included the three nerves to the hand. The single injection technique required less time for block performance (mean 5.5 min) than multiple injections (mean 9.5 min), P < 0.0001. However, latency of the block was longer and the requirement for supplemental nerve blocks was greater, after single injections (33 min and 57%) than after multiple injections (15.5 min and 7%, respectively), P < 0.0001. As a result, readiness for surgery was achieved faster in group 2 (25 min), than in group 1 (38.5 min), P < 0.0001. After supplementation, block effectiveness was 100% in group 1 and 98% in group 2 (NS). The frequency of adverse effects (vessel puncture or paraesthesia) was similar in both groups. No neurological sequelae were observed. We conclude that the multiple injection technique takes longer to perform than single injection, but that readiness for surgery is faster because of shorter block latency and better spread of analgesia.
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PMID:Readiness for surgery after axillary block: single or multiple injection techniques. 908 15

Ropivacaine is a new, long-acting local anaesthetic, prepared as a single enantiomer (the S form). Ropivacaine has a pKa of 8.07, a protein binding of approximately 94%, but a lower lipid solubility than bupivacaine. Extensive animal toxicological studies have shown a lower propensity for cardiotoxicity with ropivacaine than with bupivacaine. Studies in sheep have shown that the systemic toxicity of ropivacaine is not enhanced by gestation. Studies in human male volunteers have shown that ropivacaine is associated with at least 25% less CNS and cardiovascular adverse effects than bupivacaine following use of intravenous infusions of either drug at a rate of 10 mg/min, to a maximum dose of 150 to 250 mg. With its lower toxicity, especially cardiovascular toxicity, and less intense motor blockade, ropivacaine may have advantages over bupivacaine in epidural pain relief during labour. In general, comparative studies have shown ropivacaine and bupivacaine to have similar efficacy, but ropivacaine has a greater degree of separation between motor and sensory blockade than bupivacaine when it given epidurally for epidural pain relief during labour (as intermittent doses or continuous infusion) or for caesarean section. A significantly lower rate of instrumental deliveries and significantly higher neurological and adaptive capacity scores in neonates at 24 hours were noted for following epidural relief during labour with ropivacaine in a meta-analysis of 6 studies comparing this agent with bupivacaine. Ropivacaine is also of great interest when used as an epidural infusion for postoperative analgesia. There are a few studies evaluating epidural infusions of ropivacaine 0.1%, 0.2% or 0.3% (10 ml/h for 21 hours) after upper or lower abdominal or orthopaedic surgery, and epidural infusion of ropivacaine 0.2% (6 to 14 ml/h) after orthopaedic surgery. The studies show that ropivacaine provides postoperative pain relief in a dose-related manner with minimal or a low degree of dose-related motor blockade. Recommended doses of ropivacaine given epidurally to control postsurgical pain or labour pain are 20 to 40 mg as a bolus with 20 to 30 mg as a top-up with an interval > or = 30 minutes. Alternatively, ropivacaine 2 mg/ml (0.2%) can be given as a continuous epidural infusion at a rate of 6 to 14 ml/h (lumbar) or 4 to 8 ml/h (thoracic). Epidural ropivacaine 0.2% provides a good level of analgesia with minimal motor block, but the effects of a combination of ropivacaine and an opioid administered epidurally could have potential and need to be investigated. Preoperative or postoperative subcutaneous wound infiltration, during cholecystectomy or hernia repair, with ropivacaine 100 to 175 mg has been shown to be more effective than placebo and as effective as bupivacaine in reducing wound pain. The adverse effects associated with epidural administration of ropivacaine include hypotension, nausea, bradycardia, transient paraesthesia, back pain, urinary retention and fever. In comparative studies of ropivacaine and bupivacaine, the 2 drugs appear to be associated with a similar incidence of similar types of adverse effects excluding cardiovascular and CNS toxicities which are lower with ropivacaine. In conclusion, ropivacaine is effective for pain relief during labour and in the postoperative period. Ropivacaine is associated with less cardiovascular and CNS toxicity than bupivacaine and provides a greater degree of dissociation between sensory and motor effects producing less intense motor blockade and more rapid recovery to full patient mobilisation.
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PMID:Preliminary risk-benefit analysis of ropivacaine in labour and following surgery. 924 93

Axillary brachial plexus blocks were established in 40 patients using transarterial technique (n = 20) or paresthesia technique (n = 20). Sensory and motor blockades of nerves supplying the upper extremity were compared at 10, 20 and 30 minutes after the injection of local anesthetics (1.5% plain mepivacaine 40 ml). Sensory blockades of the radial nerve and axillary nerve were significantly higher with transarterial technique than paresthesia technique. The incidence of analgesia of the radial nerve at 30 min was 100% with transarterial technique and 70% with paresthesia technique. Sensory blockades of the other nerves and motor blockades of all nerves did not show any significant differences between the two techniques. Proximal and distal spreads of the local anesthetic-contrast medium mixture within the axillary neurovascular sheath were studied in 20 patients. No statistically significant difference was observed in the spread of contrast agent between the two techniques. Transarterial technique is a recommendable method for hand surgery and especially indicated for the surgery of the area supplied by the radial nerve.
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PMID:[Comparison of transarterial technique and paresthesia technique of axillary brachial plexus block]. 951 27

SMON (subacute myelo-optico-neuropathy) may result from clioquinol neurotoxicity. An 81-year-old woman underwent internal fixation for left intertrochanteric fracture. She had been diagnosed as having SMON twenty years previously. Sensory examination revealed paresthesia and decreased deep sensation in the lower extremity. A recent neuropathological report shows that in long-term SMON of about fifteen years, degeneration is located from the medulla oblongata to T5-6. We performed spinal anesthesia of which the level of analgesia was below T5-6 in the present case. The level of anesthesia was determined by the pinprick test, and was recognized as below T10. Postoperatively, both the sensory level of analgesia and vital signs remained stable. There was no worsening of neurological findings after spinal anesthesia, including the postoperative period. In conclusion, spinal anesthesia which was limited to below the level of degeneration could be applied in a case of long-term SMON.
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PMID:[Spinal anesthesia for a patient with long-term SMON]. 1003 97

Stellate ganglion block is a common treatment for neuropathic pain. The technique is not without potentially severe complications when a paratracheal approach is used. A 33-year-old woman complained of atypical facial pain of 15 years' duration with pain intensity of 6 to 8 on a visual analog scale and no pain-free periods upon use of inadequate analgesia. One minute after performing a second stellate ganglion block the patient showed signs of apnea and paralysis of the upper extremities and face, with no involvement of oculomotor muscles or the lower extremities, and no loss of consciousness. Assisted ventilation was started. Signs and symptoms resolved fully after 15 minutes. A few days later, the patient reported having perceived paresthesia in the affected zone during the procedure. Central spread of a portion of local anesthetic by way of the spinal nerve sheath toward the subarachnoid space may cause partial cervical and basal nuclear blockade. Signs would be apnea, involvement of the upper extremities and facial muscles, although paresthesia during the injection is the only evidence supporting this hypothesis. Bone contact and negative aspiration while performing a stellate ganglion block do not guarantee avoidance of complications.
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PMID:[A possibility of central diffusion during stellate ganglion blockade: "the sheath of the spinal rachidian nerve"]. 1022 77

Thoracic epidural analgesia appears to improve the outcome of patients undergoing coronary artery bypass graft surgery. Cranial extension of nerve blockade involving the third, fourth and fifth cervical nerve roots can cause apnoea. However, progressive paraesthesia and weakness due to cephalad spread of thoracic epidural analgesia will affect the arms before the diaphragm. A scale was designed to test three active movements of the arms bilaterally: hand grip (T1/C8), wrist flexion (C8/7) and elbow flexion (C6/5). This epidural scoring scale for arm movements (ESSAM) consists of four grades (0-3) based on the number of absent movements, and suggests appropriate action. The reliability of this scale was tested in 40 patients undergoing coronary artery bypass surgery. Twelve of the 40 patients had their epidural infusion reduced on the basis of the scale. Of these 12 patients, eight had a worst ESSAM score of 1, three had a worst score of 2 and one had a worst score of 3. In each patient, motor power returned following the reduction in infusion rate, taking between 30 min and 3 h. This scale appears to be a simple and reliable method for the early detection of the cephalad spread of thoracic epidural analgesia.
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PMID:An epidural scoring scale for arm movements (ESSAM) in patients receiving high thoracic epidural analgesia for coronary artery bypass grafting. 1054 Jan 2

Serious neurological complications caused by spinal hematoma or abscess following central neuraxial block have been reported more often during the last years. In contrast, severe complications are extremely rare associated with peripheral nerve blocks. Concerned about the safety of spinal and epidural anesthesia, we encourage the use of peripheral regional techniques for procedures on the lower extremity and especially for postoperative regional analgesia. Motor block due to lumbar epidural anaesthesia using high concentrations of local anesthetic makes spinal hematoma or abscess difficult to recognize. Therefore, low concentrations of local anesthetic should be used for postoperative epidural analgesia. Any increase in motor block following neuraxial blockade should raise the suspicion of a spinal compression (e.g. hematoma or abscess). Other symptoms are back pain, radicular pain or paresthesia and incontinence. Disastrous neurological injuries can only be prevented by immediate diagnosis (MR, CT or myelography) and therapy (surgical decompression).
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PMID:[Indications for central versus peripheral regional anesthesia]. 1092 50

This clinical report is based on retrospective observation of the outcome and effects of patient-controlled epidural analgesia (PCEA) with bupivacaine infusion administered at home to five patients with intractable herpetic neuralgia. All patients had severe pain (9 or 10 visual analogue scale [VAS]points) confined to the affected dermatomes, which was refractory to medication. The interval between zoster onset and PCEA application ranged from 27 to 60 days (mean, 37.2 d). The average daily amount of bupivacaine used was 36.5 to 91.2 mg (mean +/- standard deviation, 62.4 +/- 19.7 mg). The duration of PCEA therapy ranged from 10 to 28 days (18.4 +/- 7.6 d). One patient developed drug tolerance. All treatments resulted in effective and satisfactory pain relief (VAS, 0-3), with increase in physical activities to normal levels and easing of sleep and appetite impairment. No deleterious effects were found during PCEA therapy. After discontinuation of PCEA, two patients did not complain of pain but still had slight paresthesia, one of them required low-dose antidepressant for 17 days; three patients continued to have occasional sharp pain (VAS, 2-3) and required low-dose antidepressant and analgesic as-needed for one to six months. These results suggest that PCEA with bupivacaine infusion provides effective pain relief in patients with intractable herpetic neuralgia and is a feasible and effective home treatment modality with limited side effects.
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PMID:Home-based patient-controlled epidural analgesia with bupivacaine for patients with intractable herpetic neuralgia. 1096 13


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