Active clinical trials for "Pain, Postoperative"

Perfusion index (PI) measured via a pulse oximeter has been shown to correlate with activation of the sympathetic nervous system, such as by pain stimulation, as a result of involuntary contraction of the arterioles. Thus PI holds potential for use as a tool for "objective pain measurement", although its practical usefulness and dependability as such have not previously been investigated. The investigators aim to explore associations between changes in PI and onset of pain following cessation of regional anaesthesia in alert patients following ankle fracture surgery. Methods: The investigators report an exploratory, observational analysis of prospectively gathered PI data from patients undergoing regional anaesthesia with spinal or peripheral nerve block for ankle fracture surgery as participants of the randomised AnAnkle Trial (EudraCT: 2015-001108-76). PI is measured on an unaffected extremity in approximately 20 consecutive patients already included in the AnAnkle Trial at Herlev University Hospital, evenly distributed between spinal anaesthesia (SA) and peripheral nerve block (PNB). Both anaesthesia forms and pain medication regimes are standardised as part of AnAnkle Trial and participants register pain scores on a 0-10 numeric rating scale every three hours and register the time of cessation of anaesthesia identified by return of sensation to the ankle. Morphine consumption is also registered. The investigators will explore correlations of changes in PI to increases in pain upon cessation of the regional anaesthesia and, secondly, differences in cessation related PI changes with SA versus PNB. Ethics: All participants have already given informed, written consent for use of this data for the AnAnkle Trial. All necessary ethical and legislative approvals have been obtained for initiation of AnAnkle Trial in July 2015.

The purpose of this study is to determine the incidence and risk factors of moderate to severe pain after cardiac surgery, and compare the preoperative pain expectation and postoperative pain experience in the same patient.

Osteoarthritis (OA) is the single most common cause of disability in mid and late life. About 27 million people in the United States suffer from this incurable process and 10 million have OA of the knee. Total knee replacement (TKR) is a reliable treatment option for patients disabled by knee OA who have failed non-operative treatment; 58% of these surgeries are performed on patients 65 years or older. Despite the overall success of TKR in most cases, persistent postsurgical pain (PPP) of the operated knee remains a common and often difficult to treat postoperative outcome affecting 13-20% of all patients at 6 months post-TKR, which amounts to 65,000-100,000 patients/year in the USA. Important secondary outcomes of PPP are restricted physical mobility and poor quality of life, especially in older patients. Recent findings spanning the pre-, intra- and postoperative periods suggest that the development of PPP after TKR is a multi-factorial process, comprised of both neurophysiologic and psychosocial factors. Likely determinates include preoperative thermal pain sensitivity, anxiety, pain catastrophizing; and postoperative area of secondary mechanical hyperalgesia or hypoalgesia (numbness). There is already agreement that the intensity of early (acute) postoperative pain is one of the factors predicting PPP. To date, most studies have examined the role of risk factors in isolation and/or within a single domain, and no prospective study has comprehensively evaluated the interaction of neurophysiologic and psychosocial variables in the evolution of PPP following TKR. The lack of information regarding how neurophysiologic pathways and patient cognitive/affective states interact over time following otherwise successful TKR has greatly undermined the understanding of PPP after TKR. The proposed project is a single-site, prospective study of 300 OA patients aged 18-85 yrs undergoing primary TKR. The study is designed to identify factors from the pre-, intra- and postoperative phases of TKR that contribute to PPP at 6 months. Specific risk factors were selected because they are potentially modifiable, and therefore may be amenable to intervention. Patients will be assessed from pre-surgery to 6 months post surgery. The proposed multi-factorial and prospective approach to investigating risk factors is a vital next step towards understanding the complex phenomenon of PPP.

Previous studies have reported that about 3 % of patients who have had open inguinal herniorrhaphy had a visceral, ejaculatory-related pain. The investigators want to assess this problem among patients after laparoscopic inguinal hernia repair with(self-administered questionnaire study).

Perioperative analgesia using US guided TAP block

Object: Every person's pain perception and possible postoperative pain is different. As the investigators know, they are affected by many factors. However, the investigators don't know whether the smoking factors, alcohol factors, surgery type, education background, etc. will affect individual pain perception and possible postoperative pain in Chinese population. This study was conducted to investigate the power of these possible affect factors. Method: Patients receiving elective surgery under general anesthesia were recruited into this study. The investigators measured their preoperative pressure pain threshold (PPT) and pressure pain tolerance (PTO)and also investigated the patient's personal information of smoking factors, alcohol factors, surgery type, education background, etc. In addition, we retrospectively investigated the visual analog scale (VAS) during patient-controlled analgesia (PCA) treatment 0 to 48 h after operation as well as the PCA press frequency and drug consumption of those patients who received PCA administration.

The treatment of postoperative pain continues to be inadequate in the investigators practice setting. Inadequate pain treatment not only contributes to postoperative complications in the short term but can also be a factor that favors the development of chronic postoperative pain and diminishes long-term quality of life. Risk factors that can lead to a transition to chronic pain need to be analyzed.

Chronic Pain is a wellknown complication after cholecystectomy. Intensity of the pain in the first week after the operation is a predictive factor for the development of chronic pain, but it is unknown whether the risk is more related to one of the different components of acute pain (ie somatic, visceral, referred). Furthermore the chronic pain has not been systematically described in terms of type of pain or sensory abnormalities etc. (allodynia, hyperalgesia etc.). The purpose of the study is to examine whether intensity of components of acute pain is predictive for development of chronic pain after cholecystectomy and to characterize the chronic pain by quantitative sensory testing. DNA-samples are collected to examine genetical factors, important for perception of pain, and the development of chronic pain.

Autologous fat grafting, also known as lipofilling, is a surgical technique consisting in the processing and transfer of adipose tissue from one area in our organism (hips, thighs) to region which in need of reconstructive and aesthetic correction. The technique is frequently used after radical or conservative mammary surgery, aiming to achieve better aesthetic results, reduce pain induced by both surgery and radiotherapy. The scientific community was widely involved in the debate regarding the use of mesenchymal/stem cells in a patient with high risk of tumor progression due to their elevated proliferative profile. This study aims to retrospectively evaluate the oncological safety in the use of lipofilling in patients who underwent oncological and reconstructive treatment in our Institute.

this study will assess different irrigating materials on the success revascularization of necrotic mature teeth associated with PRF.