View clinical trials related to Acute Pain.
Filter by:Findings from the investigator's lab and others' show the involvement of the brain's mesolimbic circuitry in pain perception and evaluation, as well as during the transition from acute to chronic pain states in both humans and animals. Dopamine (DA) is one of the main neurotransmitters in this circuitry, and it is possible it could have an intimate role in pain processing, chronicity, and related anatomical and functional neuroplasticity. In this study, the investigators first need to know if the combination of l-dopa and Naproxen is safe and efficacious in humans with acute pain, and if so, at what doses. For the present study, healthy pain-free participants will be injected with a small bolus of capsaicin subcutaneously to induce acute cutaneous inflammatory pain. Capsaicin is ideal for this study because it causes a characteristic inflammatory response that is almost always accompanied with pain, has a well-validated dose-response curve, and has effects that will go away completely in a few hours after administration, causing no permanent damage to study subjects. Effects of capsaicin will be measured by changes (decreases) from baseline in thermal and tactile thresholds, as well as by verbally reported cutaneous pain levels (on a scale from 0-10). Participants will also be given study medication in the form of a placebo, one drug, or a combination of drugs before capsaicin injection to allow for any analgesic effects to peak before pain onset. For those receiving active medication, they will either receive Naproxen with placebo or the combination of naproxen and l-dopa (the latter of which will be in one of two different doses). This will allow the investigators to investigate (1) whether co-administration of naproxen and l-dopa has analgesic effects in low levels of acute pain in humans, (2) if this combination is pain-alleviating, whether it is equally as or more efficacious than naproxen, which is the clinical standard of treatment, and finally (3) what dose provides the most analgesia.
ًًًُُُُThe investigators are testing the efficacy of a new novel technique; serratus anterior plane block, for preventing postoperative pain after breast surgery for cancer. This block will be compared with the well-established paravertebral block.
The primary objective of the study is to assess analgesic efficacy of Impracor (Ketoprofen 10% Cream) compared to placebo for acute pain associated with OA flare of the knee.
The study is prospective and double blind. In the clinic, patients undergoing hysterectomy that meet the criteria for inclusion into the study and agreed to participate in the study will be randomized into two groups.
Background: - Many people feel pain during and after bone marrow aspiration (collection). Studies suggest that pain may be related to different kinds of inflammation, or the presence of nitric oxide (a normally occurring gas) in the body. Researchers want to study nitric oxide levels in the blood and breath before and after bone marrow collection. They will look at how these levels relate to feelings of pain. Objectives: - To better understand pain related to having a bone marrow collection. Eligibility: - Individuals at least 18 years of age who are enrolled in a study that requires bone marrow collection. Design: - Participants will be screened with a physical exam, medical history, and blood sample. - Participants will provide study blood and breath samples to check nitric oxide levels. Participants will also have a test to measure skin sensitivity to heat and touch. - During the collection, participants will keep track of their pain levels. - After the collection, participants will keep track of any pain medications they take. They will also record if and when they eat any foods that contain nitrates for about 24 hours.