Articles: pain.
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Ann R Coll Surg Engl · Sep 1989
Randomized Controlled Trial Clinical TrialIntrathecal diamorphine: a dose-response study.
A randomised double-blind study compared the dose-response relationship of intrathecal diamorphine (0, 0.25, 0.75, 1.5, and 2.5 mg) for postoperative pain relief, in 35 subjects who underwent total knee replacement surgery. Assessments commenced 2 h after the opioid injection and continued for 20 h. Pain, analgesic effect, supplementary analgesic requirements and adverse effects were noted. ⋯ Intrathecal diamorphine was safe and was not associated with clinically apparent respiratory depression. Its effects were inconsistent and its use was associated with irritating side effects. Possible explanations for the erratic behaviour of the diamorphine are discussed.
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Randomized Controlled Trial Clinical Trial
Study of the effectiveness of bupivicaine infiltration of the ilioinguinal nerve at the time of hernia repair for post-operative pain relief.
The effect on post-operative pain relief and analgesic requirements of direct ilioinguinal nerve block using 0.5% bupivicaine (Marcain) at the time of hernia repair was studied. Sixty patients were randomly allocated into two groups, A and B, both being well matched for age, numbers and sex. Those in whom nerve block was used (Group A) required significantly less intramuscular opiates and strong oral analgesics (co-dydramol) than those who did not receive bupivicaine (Group B) during the first 24 hours post-operatively.
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Randomized Controlled Trial Clinical Trial
Does intravenous methadone provide longer lasting analgesia than intravenous morphine? A randomized, double-blind study.
A prospective, randomized, double-blind trial was designed to compare the duration of analgesia produced by intravenous morphine and methadone. Patients with intractable cancer-related pain were studied for 5-6 days. One-eighth of the patient's daily opiate requirement was supplied as an i.v. infusion of either morphine or methadone over a period of 15 min. when initiated by the patient using a patient-controlled analgesia device. ⋯ All patients had adequate analgesia as determined by at least a 50% difference in pain intensity at peak relief. The duration of pain relief when repeated intravenous doses of these analgesics were given was similar throughout the entire study period although morphine and methadone have different serum half-lives (3 vs. 25 h). Parenteral methadone does not offer a clinically significant increase in the duration of analgesia in patients with severe pain secondary to cancer.
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Randomized Controlled Trial Comparative Study Clinical Trial
Less pain with epidural morphine after knee arthroplasty.
Twenty-two patients were randomly allocated to systemic opioids or epidural morphine the first 10 days after total knee arthroplasty. Pain was recorded daily in a visual analogue scale, and knee motion was measured on Day 10. Pain was lower in the epidural group, with no difference in knee flexion or range of motion.
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Acta Anaesthesiol Scand · Aug 1989
Randomized Controlled Trial Clinical TrialThe effect of topically applied anaesthetics (EMLA cream) on thresholds to thermode and argon laser stimulation.
The cold and warmth thresholds to thermode stimulation and the sensory and pain thresholds to argon laser stimulation were determined before and after topical application of EMLA (Eutectic Mixture of Local Anaesthetics) cream. The sensory threshold to argon laser stimulation and warmth threshold to thermode stimulation are both described in terms of warmth or faint heat. ⋯ The analgetic effect of topically applied lidocaine/prilocaine, evaluated by the cutaneous thermal and pain threshold, is compatible with the idea that topical application of EMLA cream blocks free nerve endings rather than the nerve fibres, and induces a sequence of sensory loss which, in some respects, differs from that typically observed after perineural application of local anaesthetics. The effect of topically applied anaesthetics is influenced by a number of thermodynamical, anatomical, and physiological factors in the skin.