Acta anaesthesiologica Scandinavica
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Acta Anaesthesiol Scand · May 1994
Randomized Controlled Trial Clinical TrialLocal analgesic and vascular effects of intradermal ropivacaine and bupivacaine in various concentrations with and without addition of adrenaline in man.
Ropivacaine, a new long-acting amino-amide local anaesthetic agent, and bupivacaine, in various concentrations with or without addition of adrenaline, were tested in a randomized, double-blind study using intradermal wheals. Ten non-smoking, healthy, young male volunteers participated. In series I plain solutions of ropivacaine (0.25%, 0.5%, 0.75% and 1%) and bupivacaine (0.25%, 0.5% and 0.75%) were injected intradermally and in series II the same concentrations, with the addition of adrenaline 5 ug.ml-1 (1:200,000), were used. ⋯ Local blanching (pale) was significantly more frequent for plain solutions of ropivacaine, in all tested concentrations. Local redness (pink) was significantly more frequent with plain bupivacaine, in a dose-dependent relation. An initial redness was frequently observed for both local anaesthetics containing adrenaline, followed by blanching at most sites.
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Acta Anaesthesiol Scand · May 1994
Comparative StudyDiclofenac sodium versus fentanyl for analgesia in laparoscopic sterilization.
The effectiveness of an anaesthetic technique employing diclofenac sodium as an analgesic given preoperatively by intramuscular injection was compared against one employing intravenous fentanyl in patients undergoing laparoscopic sterilization. Postoperative pain was marked and both drugs provided partial relief only. ⋯ These findings suggest that neither drug provides sufficient analgesia for laparoscopic sterilization when given as a sole analgesic. Investigation of a combined analgesic technique employing morphine and a non-steroidal anti-inflammatory drug is warranted.
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Acta Anaesthesiol Scand · May 1994
Comparative StudyComparative histopathology of epidural hydrogel and silicone elastomer catheters following 30 and 180 days implant in the ewe.
New catheter materials, termed Hydrogels, have been developed recently that are stiff until exposed to hydration. The purpose of this study was to compare the 30 and 180 day histopathology of catheters composed of a common silicone elastomer versus a Hydrogel elastomer blend (HEB). Epidural catheters composed of either silicone or HEB were implanted in 19 yearling ewes for either 30 or 180 days. ⋯ The HEB catheter was easily inserted with standard epidural needles facilitated by the inherent stiffness of the catheter prior to hydration. HEB catheters remained patent throughout 30 days of saline injections per implanted ports. Silicone catheters demonstrated increased fibrosis relative to the HEB catheter material in the epidural space and in subcutaneous tissue.
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Acta Anaesthesiol Scand · May 1994
Randomized Controlled Trial Clinical TrialContinuous positive airway pressure by mask in patients after coronary surgery.
Thirty patients who underwent coronary artery bypass grafting were randomized to receive 30% oxygen by mask either with an ambient airway pressure or with 7.4 mmHg (1 kPa) continuous positive airway pressure (CPAP) for 8 h after extubation. Arterial blood oxygen tension (PaO2) decreased remarkably in the control group after extubation (from 19.2 +/- 5.3 kPa to 12.4 +/- 2.7 kPa) but less in the CPAP group (from 16.4 +/- 3.3 kPa to 14.0 +/- 2.1 kPa). ⋯ Atelectasis was more common in patients with internal thoracic artery grafting and/or pleural drainage. In conclusion, CPAP therapy was well tolerated, and minimized the decrease in PaO2 after extubation, but could not prevent the poor oxygenation or the late development of atelectatic areas on the second postoperative day.
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Acta Anaesthesiol Scand · May 1994
Randomized Controlled Trial Clinical TrialThe effect of balanced analgesia on early convalescence after major orthopaedic surgery.
Forty-two patients scheduled for total knee arthroplasty (n = 20) or hip arthroplasty (n = 22) were randomly allocated to receive either continuous epidural bupivacaine/morphine for 48 h postoperatively plus oral piroxicam, or general anaesthesia followed by a conventional intramuscular opioid and acetaminophen regimen. Patients undergoing knee- or hip arthroplasty treated with epidural analgesia had significantly lower pain scores during mobilization under the 48 h epidural infusion compared with patients receiving conventional treatment, while no important differences were observed after cessation of the epidural regimen. ⋯ Late postoperative pain, fatigue and conservative attitudes and routines in the postoperative care, were the most important reasons limiting mobilization and activity. We conclude that effective early (48 h) postoperative pain relief with balanced analgesia does not per se lead to important improvements in convalescence and hospital stay.