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Query: UMLS:C0344307 (analgesia)
 28,200 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Thoracic epidural analgesia combined with chronic beta-adrenergic blocker medication may cause cardiac depression. We investigated the cardiovascular and myocardial metabolic effects of a T1-T12 epidural block in 18 patients (age < 65 yr, ejection fraction > 0.5), receiving chronic beta-adrenergic blocker medication and scheduled for aortocoronary bypass surgery. After randomization into a light or deeper general anesthetic group, the cardiovascular and myocardial metabolic effects of a subsequent general anesthesia induction were investigated. Thoracic epidural analgesia induced a moderate decrease in mean arterial pressure, coronary perfusion pressure, free fatty acids, and myocardial consumption of free fatty acids. General anesthesia with thiopental (2-4 mg/kg) and a low fentanyl dose (5 micrograms/kg) increased heart rate, coronary perfusion pressure, and coronary vascular resistance, whereas mean pulmonary arterial pressure and pulmonary capillary wedge pressure decreased. After thiopental (2-4 mg/kg) and a high fentanyl dose (30 micrograms/kg), mean arterial pressure and left ventricular stroke work index decreased. We conclude that a T1-T12 epidural block in well sedated, beta-adrenergic blocked patients does not induce clinically significant cardiovascular effects. Induction of general anesthesia was well tolerated, but the light general anesthetic could not prevent an increase in heart rate and coronary vascular resistance, whereas the deeper anesthetic induced slight myocardial depression. No effect on the atrioventricular conduction, as measured by the PQ-time, was noted.
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PMID:The influence of thoracic epidural analgesia alone and in combination with general anesthesia on cardiovascular function and myocardial metabolism in patients receiving beta-adrenergic blockers. 810 48

Thoracic surgeons have recently pursued innovative techniques that can help minimize postoperative pain. These have taken two basic directions. The first consists of a modification of the operative procedure itself, such that the surgical insult and hence the resulting pain are minimized. Modifications of the conventional thoracotomy technique have led to the development of the muscle-sparing thoracotomy and the linear or small transaxillary thoracotomy. The ultimate modification has been video-assisted thoracic surgery techniques, which are associated with a marked reduction in postoperative pain. The second approach centers on techniques that improve postoperative pain control. The recently published Agency Health Care Policy and Research guidelines provide a comprehensive review of the therapeutic options for postoperative pain control. These guidelines emphasize the value of nonsteroidal antiinflammatory drugs in conjunction with opioids as the preferred form of analgesia. Many authors have advocated the induction of spinal analgesia after thoracotomy, using either epidural opioids or local anesthesia, or both. Patient-controlled analgesia and multiple intercostal nerve blocks are other methods for managing postthoracotomy pain. The potential benefits conferred by aggressive pain control after thoracotomy are enormous for the patients, the surgeons, and the entire health-care system.
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PMID:Pain management principles and anesthesia techniques for thoracoscopy. 837 56

We undertook a re-evaluation of acute and chronic pain generation following Video Assisted Thoracic Surgery (VATS) with regard to chest wall trauma produced by the instruments and their ports. From intercostal space (ICS) measurements made on 40 patients, it was confirmed that both the camera and the staple gun port diameters are too large for insertion without trauma. An instrument was produced (the "Sari" Punch, Bolton Surgical Services, Sheffield, England) which cleanly excises an elipse of the superior aspect of a rib, prior to the introduction of the ports. At the same time, the recommended orbit of the instruments about the surgical focus was abandoned in favour of an alignment along one ICS so that only one nerve was potentially traumatised. These modifications were then combined with balanced, pre-emptive and continuous paravertebral analgesia and the efficacy of this approach was evaluated in nine patients undergoing VATS. Operation of the rib punch was easy in all patients and was carried out without clinical or radiological trauma to the rib. Insertion of the ports was easy and access was good to all intrathoracic structures. Postoperative analgesia was good and the mean hospital stay was 2.7 days (range 2-4). Follow-up two months later confirmed a satisfactory surgical procedure and no patients complained of chest wall pain or numbness. We conclude that pain generation with VATS must be seriously considered if the technique is to become truly successful. Balanced, pre-emptive, paravertebral analgesia will protect the central nervous system while the removal of an elipse of rib and alignment of the instruments along one ICS will reduce the likelihood of peripheral nerve trauma.
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PMID:Pain management in video assisted thoracic surgery: evaluation of localised partial rib resection. A new technique. 852 73

Thoracic paravertebral nerve blockade, although once widely practised, has now only a few centres which contribute to the literature. Data production has, however, continued and this review correlates this new information with existing knowledge. Its history, taxonomy, anatomy, indications, techniques, mechanisms of analgesia, efficacy, contraindications, toxicity, side effects and complications are reviewed. Thoracic paravertebral analgesia is advocated for surgical procedures of the thorax and abdomen, especially wherever the afferent input is predominantly unilateral eg. thoracotomy, cholecystectomy and nephrectomy. It is also of benefit in the prevention and management of chronic pain. It is a simple undertaking with impressive efficacy. Plasma local anaesthetic levels are acceptable and its side effect and complication rates are low. No mortality has been reported. For unilateral surgery of the chest or truck, thoracic paravertebral analgesia should be considered as the afferent block of choice. For bilateral surgery, its efficacy may be limited by the doses of local anaesthetic which could safely be used and further study in this area in particular is required. This form of afferent blockade deserves greater consideration and investigation.
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PMID:Thoracic paravertebral analgesia. 860 98

We have determined if thoracic extradural block before surgical incision for thoracotomy produces pre-emptive analgesia. Using a double-blind, placebo-controlled, crossover design, 45 patients (ASA II-III) undergoing posterolateral thoracotomy for lung resection were randomized to one of three groups: group 1 received 0.5% bupivacaine and adrenaline 1/200,000 (B+E) 8 ml through a thoracic extradural catheter (tip T3-T5) 30 min before skin incision and saline 8 ml 15 min after skin incision; group 2 received saline 8 ml extradurally before incision and B+E 8 ml after incision; group 3 received saline 8 ml extradurally before and after incision. General anaesthesia was induced and maintained with propofol, alfentanil and atracurium. The alfentanil infusion was stopped before chest closure and fentanyl 50 micrograms in saline 10 ml was given extradurally. Patient-controlled extradural analgesia (PCEA) was commenced with 0.125% bupivacaine, adrenaline 1/400,000 and fentanyl 6 micrograms ml-1 (continuous rate of 2 ml h-1 and supplementary doses of 0.5 ml per 6 min). Visual analogue scale (VAS) scores (recorded at rest, on mobilization and after cough), verbal rating scale (VRS) (recorded at rest), number of successful PCEA demands and complications were measured during the first 48 h after operation. There was no significant difference between groups, either in PCEA requirements (P > 0.21) or in VAS scores (either at rest, during mobilization of the ipsilateral arm of surgery or after cough). No significant differences between groups were found in the VRS. Thoracic extradural block with bupivacaine did not produce an early preemptive effect after thoracotomy.
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PMID:Absence of an early pre-emptive effect after thoracic extradural bupivacaine in thoracic surgery. 867 84

Thoracic epidural anesthesia may affect the outcome of patients undergoing coronary artery bypass graft surgery beneficially by producing superlative perioperative analgesia, stress response attenuation, and cardiac sympatholysis. The technique of instrumentation in combination with full intraoperative heparinization, however, may risk potentially serious adverse effects and undesirable drug effects. This article attempts to establish whether a favorable risk/benefit ratio exists and to clarify the role of sympatholysis by thoracic epidural anesthesia in cardiac surgery.
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PMID:Epidural anesthesia in coronary artery bypass grafting surgery. 942 21

Thoracic surgical oncology involves surgical treatment of lesions of the thoracic wall, pulmonary parenchyma, or mediastinum (also including heart, esophagus, or trachea). The most common neoplasms of the thoracic wall are osteosarcoma and chondrosarcoma. Histopathologic type, the use of chemotherapy for osteosarcoma, and completeness of surgical margins are prognostic for survival. Relative to solitary pulmonary masses, carcinomas are most common, with histopathologic type, tumor size, tumor grade, and lymph node status prognostic for survival. Of the aforementioned variables, lymph node status is the most significant. Extensive preoperative workup, including bronchoscopy and transthoracic fine needle aspiration of solitary lung masses, is usually not recommended. Thymomas are the most common surgical mediastinal mass. Patients are frequently affected with paraneoplastic syndromes including myasthenia gravis, polymyositis, and nonthymic neoplasia. Patients without megaesophagus with surgically resectable masses have an excellent prognosis for survival. Provision of analgesia after surgery in thoracotomy patients is extremely important. Carefully selected analgesic agents in thoracotomy patients are far less damaging to cardiovascular status than is tachycardia from excessive pain. Given these and other guidelines, perioperative mortality in thoracotomy patients is minimal, and long-term survival in selected patients is excellent.
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PMID:Thoracic surgical oncology. 963 48

To assess thoracic analgesia by continuous infusion in surgery to repair pectus excavatum and carinatum in children. This prospective study enrolled 14 children aged 6 to 14 years old scheduled for surgery to correct pectus excavatum and carinatum. After induction of general anesthesia, the T8-T9 epidural space was accessed and a catheter was inserted to T3-T7 with radioscopic monitoring. A loading dose of 0.03-0.04 ml/kg per segment to be blocked (5 segments: T3-T8) of 0.125% bupivacaine and 3 micrograms/ml fentanyl was given to children under 7 years of age; a dose of 0.02-0.03 ml/kg per segment was administered to children over the age of 7 years. A continuous perfusion of 0.1-0.4 ml/kg/h was maintained, with the possibility of additional boluses of 1 ml at 20 min intervals during surgery and the first three days thereafter. An intraoperative bolus was given when the level of blockade was not reached or when mean blood pressure and heart rate increased 15% over baseline. Pain relief was assessed on a numerical scale of 0 to 5 or on a scale of facial icons, depending on the patient's age. During the postoperative period, the pediatric ICU nurse administered a bolus if pain was [symbol see text]3 or heart rate increased 75% over age-based reference values. Top-up analgesia was provided with Metamizole at a dose of 25 mg/kg. No complications attributable to the technique or to sympathetic blockade were observed. All tubes were removed in the operating room. The thoracic epidural catheter was left in place for 70.3 +/- 2.6 h. Mean initial doses of analgesia were 0.45 microgram/kg of fentanyl and 0.2 mg/kg of bupivacaine. The mean number of complementary boluses was 3 +/- 1 during surgery, 5 +/- 2 on the first postoperative day and 4 +/- 1 on the second day. No patient required top-up analgesia on the third day. Hemodynamic stability during surgery and the postoperative period was good. Analgesia was excellent (< 2) for 78.5% of the patients on the first day after surgery, for 85.7% on the second day and for all patients on the third day. We recorded one case of pruritus (7.1%), three of nausea (21.4%) that subsided when butorphanol was given epidurally (20 micrograms/kg), and two cases of light sedation. Thoracic epidural analgesia is effective for alleviating postoperative pain from corrective thoracic surgery in children. Side effects were minimal and no anesthetic complications were observed.
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PMID:[Thoracic epidural analgesia in the postoperative period of pediatric surgery for the repair of pectus excavatum and pectus carinatum]. 964 55

Pain during pleurodesis is frequently severe and poorly suppressed with intravenous narcotics and/or local anesthetic installation. Epidural analgesia is very effective for all types of severe pain including surgical anesthesia, yet has not been reported in treating pleurodesis pain. Thoracic epidural can be safely and extremely effectively utilized when neural pathways are considered, as this case history demonstrates.
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PMID:Complete analgesia during pleurodesis under thoracic epidural anesthesia. 969 6

The Thoracic Research Scholarship 1996 of the German Society for Thoracic and Cardiovascular Surgery enabled me to visit Barnes Hospital at the Washington University of St. Louis, USA, from May to July 1996. At that center Prof. J. D. Cooper has established lung-volume reduction surgery as a successful surgical treatment for patients with endstage pulmonary emphysema. The operation is performed using left-sided double-lumen intubation. After opening of the chest and pleura and starting single-lung ventilation the less diseased parts of the second lung collapse due to absorption atelectasis whereas the more diseased portion of the lung stays hyperinflated. Linear staplers buttressed with bovine pericardium are used to resect the diseased parts of the lungs. Approximately 20-30% of the total lung volume can be resected by this way on each side. After inspection of the lungs for air leaks and preparation of pleural tents the pleura is closed bilaterally. Postoperative analgesia is performed via epidural catheter and patients are extubated postoperatively as soon as possible, usually in the operating theatre. 150 bilateral lung-volume reduction procedures for patients with severe emphysema were performed between January 1993 and February 1996 in St. Louis. 6 months postoperatively the 1-second forced expiratory volume had increased by up to 51% and residual volume was reduced by 28%. 70% of patients who required continuous oxygen supply prior to the operation no longer required this measure: the PaO2 had increased by an average of 8 mmHg. These data demonstrate that bilateral lung-volume reduction surgery is a suitable treatment for patients with terminal pulmonary emphysema. Most important for the success of this procedure are clear selection and specific perioperative treatment of the patients.
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PMID:German Thoracic Research Scholarship 1996: lung volume reduction for endstage pulmonary emphysema at the Washington University of St. Louis. 971 99


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