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Somatic Pain (somatic + pain)
Selected AbstractsPost-operative pain relief following intrathecal injection of acetylcholine esterase inhibitor during lumbar disc surgery: a prospective double blind randomized studyJOURNAL OF CLINICAL PHARMACY & THERAPEUTICS, Issue 6 2008Z. H. Khan MD Summary Background:, As spinal cholinergic receptors participate in the control of somatic pain, this effect could be potentiated by intrathecal injection of a cholinesterase inhibitor, neostigmine. Objective:, This study was designed to evaluate the effectiveness of intrathecal administration of neostigmine on pain relief after single level lumbar disectomy. Methods:, Sixty-six patients with unilateral extruded lumbar disc were randomly allocated into two groups, neostigmine (,N'), and control (,C'); the former received 100 ,g of neostigmine methylsulphate, whereas the latter received placebo intrathecally after termination of the surgery. Visual Analogue Scale was employed to measure post-operative pain, which was a primary outcome of the study. Opiate dosage consumed was also recorded as a primary outcome during the first 24 h following surgery. Nausea and vomiting although important were considered as secondary outcomes. Results:, Mean Visual Analogue Scale scores post-operatively at 1, 4 and 8 h were 2·24, 1·82 and 1·88 in group ,N' and 5·36, 5·61 and 4·88 in group C. Mean morphine used intravenously in the first 24 h was 0·9 mg in group ,N' and 4·7 mg in group C. All results were found to be significantly different in the two groups. The frequency of nausea and vomiting was not significantly different in the two groups ,C' (24%) and ,N' (18%). Conclusion:, Injection of 100 ,g hyperbaric neostigmine intrathecally was effective for pain relief, and reduced post-operative opiate demand. [source] Improvement of Chronic Pain by Treatment of Erectile DysfunctionTHE JOURNAL OF SEXUAL MEDICINE, Issue 12 2008Jalil Arabkheradmand MD ABSTRACT Introduction., Pain specialists, who do not routinely examine patients regarding their sexual medicine problems, need to be aware that sexual problems can and do aggravate the patient's pain. Patients may refuse to admit suffering from erectile dysfunction (ED) but complain about continuous or progressive severe pain. These patients may be best managed by the combined team effort of a sexual medicine specialist and pain specialist. Aim., This report documents the management of three cases with long-term intractable pain after severe trauma. Treatment of occult ED led to significant improvement of their pain. Main Outcome Measures., The association of the treatment of uncovered ED and improvement of chronic severe pain. Methods., Three case reports of patients with severe pain who attended a pain clinic in an academic medical center. Results., Three men suffering from chronic pain due to severe trauma were observed for several years by different physicians as well as pain specialists. In spite of different treatments, including administration of several analgesics, psychotherapy, and physical therapy, pain was not alleviated. After finding ED problems, patients were referred to the family health clinic. Using different therapies such as psychosexual therapy, correction of sexual misconceptions, relaxation training, treatment of interpersonal difficulties, and pharmacological intervention ED was cured. Treatment of ED was accompanied by a significant reduction of chronic pain in all three patients. Conclusion., The present report indicates that uncovered ED in patients suffering from chronic pain may trigger their somatic pain or reduce its threshold. Significant improvement in sexual functioning may improve the pain and reduce its complications. Arabkheradmand J, Foroutan SK, Ranjbar S, Abbasi T, Hessami S, and Gorji A. Improvement of chronic pain by treatment of erectile dysfunction. J Sex Med **;**:**,**. [source] Thalamic sensitization transforms localized pain into widespread allodyniaANNALS OF NEUROLOGY, Issue 1 2010Rami Burstein PhD Objective Focal somatic pain can evolve into widespread hypersensitivity to nonpainful and painful skin stimuli (allodynia and hyperalgesia, respectively). We hypothesized that transformation of headache into whole-body allodynia/hyperalgesia during a migraine attack is mediated by sensitization of thalamic neurons that process converging sensory impulses from the cranial meninges and extracephalic skin. Methods Extracephalic allodynia was assessed using single unit recording of thalamic trigeminovascular neurons in rats and contrast analysis of blood oxygenation level-dependent (BOLD) signals registered in functional magnetic resonance imaging (fMRI) scans of patients exhibiting extracephalic allodynia. Results Sensory neurons in the rat posterior thalamus that were activated and sensitized by chemical stimulation of the cranial dura exhibited long-lasting hyperexcitability to innocuous (brush, pressure) and noxious (pinch, heat) stimulation of the paws. Innocuous, extracephalic skin stimuli that did not produce neuronal firing at baseline (eg, brush) became as effective as noxious stimuli (eg, pinch) in eliciting large bouts of neuronal firing after sensitization was established. In migraine patients, fMRI assessment of BOLD signals showed that brush and heat stimulation at the skin of the dorsum of the hand produced larger BOLD responses in the posterior thalamus of subjects undergoing a migraine attack with extracephalic allodynia than the corresponding responses registered when the same patients were free of migraine and allodynia. Interpretation We propose that the spreading of multimodal allodynia and hyperalgesia beyond the locus of migraine headache is mediated by sensitized thalamic neurons that process nociceptive information from the cranial meninges together with sensory information from the skin of the scalp, face, body, and limbs. ANN NEUROL 2010 [source] Opioid switching from transdermal fentanyl to oral methadone in patients with cancer painCANCER, Issue 12 2004Miguel Angel Benítez-Rosario M.D., Ph.D. Abstract BACKGROUND Patients with cancer often are rotated from other opioids to methadone to improve the balance between analgesia and side effects. To the authors' knowledge, no clear guidelines currently exist for the safe and effective rotation from transdermal fentanyl to methadone. METHODS The authors evaluated a protocol for switching opioid from transdermal fentanyl to oral methadone in 17 patients with cancer. Reasons for switching were uncontrolled pain (41.1% of patients) and neurotoxic side effects (58.9% of patients). Methadone was initiated 8,24 hours after fentanyl withdrawal, depending on the patient's previous opioid doses (from < 100 ,g per hour to > 300 ,g per hour). The starting methadone dose was calculated according to a 2-step conversion between transdermal fentanyl:oral morphine (1:100 ratio) and oral morphine:oral methadone (5:1 ratio or 10:1 ratio). The correlation between previous fentanyl dose and the final methadone dose or the fentanyl:methadone dose ratio was assessed by means of Pearson and Spearman correlation coefficients (r), respectively. A Friedman test was used to compare pain intensity before and after the switch and the use of daily rescue doses. RESULTS Opioid rotation was fully or partially effective in 80% and 20%, respectively, of patients with somatic pain. Neuropathic pain was not affected by opioid switching. Delirium and myoclonus were reverted in 80% and 100% of patients, respectively, after opioid switching. A positive linear correlation was obtained between the fentanyl and methadone doses (Pearson r, 0.851). Previous fentanyl doses were not correlated with the final fentanyl:methadone dose ratios (Spearman r, , 0.327). CONCLUSIONS The protocol studied provided a safe approach for switching from transdermal fentanyl to oral methadone, improving the balance between analgesia and side effects in patients with cancer. Cancer 2004. © 2004 American Cancer Society. [source] | ||||||||||