Pain practice : the official journal of World Institute of Pain
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Randomized Controlled Trial
A New Method for Sham-Controlled Acupuncture in Experimental Visceral Pain - a Randomized, Single-Blinded Study.
Acupuncture is increasingly used as an alternative to medical therapy for various pain conditions. To study the effect of acupuncture in experimental and clinical studies, a control condition with sham acupuncture is needed. However, as such models have not been established in assessment of acupunctures effect against visceral pain, this study aimed to validate a new method for blinded sham acupuncture in experimental rectal pain. ⋯ The presented sham procedure provides a valid method for blinding of "sham acupuncture" and may be used in future blinded controlled trials of acupuncture for visceral pain.
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Randomized Controlled Trial
Pooled Post Hoc Analysis of Population Pharmacokinetics of Oxycodone and Acetaminophen Following Multiple Oral Doses of Biphasic Immediate-Release/Extended-Release Oxycodone/Acetaminophen Tablets.
To examine whether biphasic immediate-release (IR)/extended-release (ER) oxycodone (OC)/acetaminophen (APAP) 7.5/325-mg tablets have clinically relevant variability in population pharmacokinetics (PK). ⋯ Dose adjustments of < 50% are not clinically relevant for IR/ER OC/APAP 7.5/325-mg tablets considering the approved dose of 1 to 2 tablets every 8 to 12 hours; thus, adjustment may be necessary for large deviations from normal body weight but not for sex.
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Randomized Controlled Trial
Impact of Threat Level, Task Instruction, and Individual Characteristics on Cold Pressor Pain and Fear among Children and Their Parents.
The cold pressor task (CPT) is increasingly used to induce experimental pain in children, but the specific methodology of the CPT is quite variable across pediatric studies. This study examined how subtle variations in CPT methodology (eg. provision of low- or high-threat information regarding the task; provision or omission of maximum immersion time) may influence children's and parents' perceptions of the pain experience. Forty-eight children (8 to 14 years) and their parents were randomly assigned to receive information about the CPT that varied on 2 dimensions, prior to completing the task: (i) threat level: high-threat (task described as very painful, high pain expressions depicted) or low-threat (standard CPT instructions provided, low pain expressions depicted); (ii) ceiling: informed (provided maximum immersion time) or uninformed (information about maximum immersion time omitted). ⋯ For children in the low-threat condition, an informed ceiling was associated with less state pain catastrophizing during the CPT. Pain intensity, tolerance, and fear during the CPT did not differ by experimental group, but were predicted by child characteristics. Findings suggest that provision of threatening information may impact anticipatory outcomes, but experienced pain was better explained by individual child variables.
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Observational Study
Problems in Functioning in Patients with Chronic Musculoskeletal Pain Admitted for Multidisciplinary Rehabilitation.
Little is known about the extent to which improvements in various problem areas are attained after multidisciplinary rehabilitation program in patients with chronic musculoskeletal pain (CMP). ⋯ A 15-week multidisciplinary treatment program showed that most problems were seen within chapters Mobility and Community life of the ICF. The program led to significant improvements of patient reported problems, the magnitude of which was similar for all different problem areas.
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Randomized Controlled Trial
Local and Systemic Changes in Pain Sensitivity After 4 Weeks of Calf Muscle Stretching in a Nonpainful Population: A Randomized Trial.
Stretching is often used in clinical practice for a variety of purposes, including pain therapy. The possible mechanism behind the effect of stretching remains to be clarified. ⋯ Four weeks of regular stretching of the calf muscles does not affect pressure pain sensitivity, suggesting that pressure pain sensitivity is unaffected by stretching in a healthy population. The mechanisms underlying any benefits of regular stretching remain to be explained.