American journal of therapeutics
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Review
Chronic pain of osteoarthritis: considerations for selecting an extended-release opioid analgesic.
Chronic/persistent pain due to osteoarthritis is one of the most common pain conditions affecting Americans today. Inadequate pain relief or dissatisfaction with current treatments is a source of frustration and suffering for patients with chronic/persistent pain. ⋯ The several extended-release opioid analgesics that have been developed may provide an opportunity for improved patient convenience; however, clinicians must consider adverse event profiles, pharmacokinetics, abuse potential, and controlled substance-scheduling status of extended-release opioid analgesics. The purpose of this review is to highlight the efficacy and safety of extended-release opioid analgesics utilized in the management plan of chronic pain due to osteoarthritis.
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Comparative Study
Does Hextend impair coagulation compared to 6% hetastarch? An ex vivo thromboelastography study.
The objective of this study was to determine if coagulation is different between 6% hetastarch in normal saline (NS) and 6% hetastarch in lactated Ringer's solution (LR), with use of an ex vivo thromboelastography (TEG) model with healthy donated volunteer blood. We simulated hemodilution that occurs during clinical resuscitation of hemorrhagic or hypovolemic shock, using healthy human donor whole blood (WB) ex vivo. Coagulopathy related to low, medium, high, or very high dilution of WB with NS or a high-molecular-weight hetastarch-based plasma expander, 6% hetastarch in NS (HSNS) or 6% hetastarch in lactated Ringer's [Hextend (HSLR)], was analyzed by thromboelastography (TEG). ⋯ We conclude that WB containing citrate obtained from healthy donors for TEG analysis yields reproducible data over a minimum of 6 hours. Either hetastarch, when present at concentrations comparable to the manufacturer's maximum recommended dose of 20 mL/kg (equivalent to the high dilution used in these experiments), decreases clot tensile strength to levels associated with an increased risk of bleeding. Substitution of lactated Ringer's for NS in 6% hetastarch appears to offer no advantage in avoiding hemostatic compromise in an in vitro model.
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The burden of chronic/persistent pain is substantial for the patient and society as a whole. Although a variety of pharmacologic treatments are available, chronic/persistent pain remains inadequately treated. ⋯ Other limitations to the current pharmacologic treatment options include gastrointestinal effects, cardiovascular effects, and organ toxicity, as well as fear of abuse or addiction. The purpose of this review is to highlight the burden of chronic/persistent pain in today's society and discuss the limitations of short-acting pharmacologic therapies used in the treatment of chronic/persistent pain.
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We investigated the association among obesity, nocturnal oxygen saturation, and pulmonary function in 31 obese women and 17 obese men scheduled for bariatric surgery who underwent nocturnal polysomnography and pulmonary function testing. Pearson correlation coefficients showed a significant association between expiratory reserve volume percent and average oxygen saturation (P = 0.027), between body mass index and lowest oxygen saturation (P = 0.034), and between body mass index and average oxygen saturation (P = 0.039). ⋯ The lowest oxygen saturation was 80 +/- 10% in obese women and 62 +/- 19% in obese men (P = 0.001). The average oxygen saturation was 88 +/- 5% in obese women and 83 +/- 6% in obese men (P = 0.005) Therapeutic nocturnal continuous positive airway pressure may have a role by improving ventilation-perfusion matching and thereby improving nocturnal oxygen saturation in these patients.