Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0344307 (analgesia)
 28,200 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Patient-controlled modalities using intravenous or epidural routes have dramatically improved postoperative pain management. However, acute post-operative pain continues to be undermanaged. Intravenous patient-controlled analgesia (PCA), the current standard of care for acute postoperative pain management, requires the patient to be attached to a staff-programmed pump apparatus via an intravenous catheter and tubing, rendering it invasive and mobility-limiting. An innovative, needle-free, iontophoretic, fentanyl HCl patient-controlled transdermal system (PCTS) is being developed for acute postoperative pain management. Fentanyl HCl PCTS is a compact, self-contained system that is easily applied to the upper outer arm or chest. It provides pain relief therapeutically equivalent to that of a standard regimen of morphine intravenous PCA, with pharmacokinetics similar to those of intravenous fentanyl infusion. Fentanyl HCl PCTS may be an effective, non-invasive alternative to currently available PCA modalities.
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PMID:An iontophoretic, fentanyl HCl patient-controlled transdermal system for acute postoperative pain management. 1595 73

In our study we aimed to compare the effects of ropivacaine alone, ropivacaine plus tramadol HCl, and ropivacaine plus morphine HCl used as intravenous regional anesthesia (IVRA), on duration to the initiation of analgesia, total analgesia time, analgesic requirement, sedation levels and hemodynamic parameters. 53 patients undergoing minor hand surgery were included into the study. Patients were randomly divided into three groups to receive 40 ml of ropivacaine 0.2 % (Group R, n=18), ropivacaine 0.2 % plus 1 mg/kg tramadol HCl (Group RT, n=18), and ropivacaine 0.2 % plus 0.1 mg/kg morphine HCl (Group RM, n=17) as IVRA. Following the injection, the durations for the initiation of analgesia were recorded. Levels of sedation, analgesia (VAS) and hemodynamic parameters were recorded in 5 minute intervals throughout first 35 minutes intraoperatively and at 1, 5, 10, 15, 20, 30, 45 and 60th minutes postoperatively. Patients were asked about the initiation of pain and requirements of analgesic at the first postoperative day. The duration to the initiation of analgesia was similar between the groups. Total analgesia time was found to be 304.0 +/- 317.6 min in Group R, 327.0 +/- 316.5 min in Group RT, and 635.9 +/- 492.3 min in Group RM. The difference between Group R and RM was statistically significant (p<0.05). Analgesic requirements were similar between the groups (p>0.05). Mild local anesthetic toxicity was observed in Group RM in two patients. We conclude that, when used as IVRA, ropivacaine alone or with tramadol or morphine produced similar analgesia and surgery conditions, and ropivacaine plus morphine had more adverse effects besides its longer duration of analgesia.
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PMID:[Comparison of ropivacaine, ropivacaine plus tramadol and ropivacaine plus morphine in patients undergoing minor hand surgery]. 1597 96

Inadequate pain control in the postoperative period not only contributes to patient discomfort, but also causes physiological changes that may result in increased risk of myocardial ischaemia, deep vein thrombosis and pulmonary embolism. These events complicate postoperative recovery and may lead to longer hospital stays as well as increased healthcare costs. Patient-controlled analgesia (PCA) has emerged as an effective way for patients to manage their pain, allowing self-administration of small doses of analgesics to maintain a certain level of pain control. PCA is most commonly delivered via an intravenous (IV) or epidural route, and while patient satisfaction is higher with PCA than with conventional methods of analgesic administration, the invasiveness, costs and risk of errors associated with currently available modalities may limit their utility. These systems also require significant healthcare resources, as nurses must manually program the pumps to deliver the correct amount of medication. Several new PCA modalities are being developed to address these limitations. These systems deliver drug through a variety of routes, including nasal transmucosal and transdermal. Most notably, a self-contained, credit card-sized, transdermal PCA system is currently in the final stages of development. The fentanyl HCl patient-controlled transdermal system (PCTS; IONSYS, Ortho-McNeil Pharmaceutical, Inc., Raritan, NJ) uses an imperceptible, low-intensity direct current to transfer fentanyl on demand across the skin into the systemic circulation. This compact system is patient-activated, can be applied to the patient's upper arm or chest, and is designed to manage moderate-to-severe pain requiring opioid analgesia. The system delivers a preprogrammed amount of fentanyl HCI over 10 minutes, for a total of 80 doses, or for 24 hours, whichever occurs first. The on-demand dosing and pharmacokinetics of this system differentiate it from the passive transdermal formulation of fentanyl designed for the management of chronic pain. Clinical studies have shown that the fentanyl HCl PCTS is effective in the management of acute postoperative pain. These studies have also demonstrated that the system is safe and well tolerated by patients.
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PMID:The fentanyl HCl patient-controlled transdermal system (PCTS): an alternative to intravenous patient-controlled analgesia in the postoperative setting. 1615 10

An iontophoretic fentanyl HCl patient-activated transdermal system (fentanyl HCl PATS) is under development for the treatment of acute postoperative pain. The fentanyl HCl PATS is a needle-free, credit card-sized, preprogrammed system that is applied to the patient's upper outer arm or chest. The fentanyl HCl PATS was demonstrated to be superior to placebo in a previous trial; however, the randomization scheme used and the lack of control of entry pain level may have contributed to the lack of robust findings. We compared the fentanyl HCl PATS with placebo for acute postoperative pain management in a larger trial that addressed the limitations of the previous study. Adult patients admitted to the postanesthesia care unit after major surgery were titrated to comfort with opioids and randomized 1:1 to receive the fentanyl HCl PATS 40 microg or placebo for 24 hours. Supplemental IV fentanyl was available to patients upon request in both treatment groups for the first 3 hours after enrollment. The primary efficacy end-point was the percentage of patients who discontinued participation in the study because of inadequate analgesia. Pain intensity scores, patient global assessments (PGA), and investigator global assessments (IGA) were collected. Four-hundred-eighty-four patients (PATS, n = 244; placebo, n = 240) were enrolled. Fewer patients receiving the fentanyl HCl PATS discontinued because of inadequate analgesia compared with placebo (28.7% versus 60.0%; P < 0.0001). Mean last pain intensity scores were 3.5 and 5.4 for the fentanyl HCl PATS and placebo groups, respectively. Patients (73.4%, PGA) and investigators (72.1%, IGA) considered the fentanyl HCl PATS a good or excellent method of pain control. Treatment-related adverse events were similar between groups. This study demonstrated the superiority of the iontophoretic fentanyl HCl PATS over placebo for acute postoperative pain management.
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PMID:An iontophoretic fentanyl patient-activated analgesic delivery system for postoperative pain: a double-blind, placebo-controlled trial. 1636 28

C-fiber-evoked field potentials in response to electrical stimulation of the sciatic nerve were recorded in the dorsal horn of the rat lumbar spinal cord, and their long-term potentiation (LTP) was induced by high-frequency stimulation applied on the sciatic nerve as a synaptic model of hypersensitivity underlying an increased efficacy of nociceptive transmission. We evaluated the effect of gabapentin on the basal C-fiber-evoked field potentials and their established LTP. Intravenously administered gabapentin (10 and 30 mg/kg, i.v.) reduced the LTP of C-fiber-evoked field potentials in a dose-dependent manner when applied 60 min after establishment of the LTP. However, gabapentin did not affect the basal C-fiber-evoked field potentials or induction of the LTP. Thus, gabapentin was effective only in sensitized conditions. By contrast, morphine HCl (1 and 3 or 10 mg/kg, i.v.) reduced both the basal responses and their established LTP. The combination of gabapentin and morphine at lower doses of each drug appeared to result in a stronger reduction on the established LTP than that of each drug alone, suggesting that combination therapy can generate better analgesia in the treatment of chronic pain.
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PMID:Gabapentin depresses C-fiber-evoked field potentials in rat spinal dorsal horn only after induction of long-term potentiation. 1685 92

Survey results continue to reveal that postoperative pain is insufficiently managed throughout Europe and the rest of the world. However, the efficient use of existing resources, as well as the introduction of novel technologies, may aid in its improvement. Use of an acute pain service has the potential to improve pain management through specialized patient care and utilization of effective analgesic techniques. Multimodal analgesic techniques, which include adjuvant non-opioids and/or regional analgesic techniques, can provide effective analgesia and reduce the amount of systemic opioids (or obviate the need) for postoperative pain management. Patient-controlled analgesia modalities may also offer improvements to pain management, as in practice they provide pain relief superior to the intermittent administration of bolus doses of opioids. A novel patient-controlled analgesia modality that has been approved by the European Medicines Evaluation Agency (EMEA) for the treatment of acute, moderate-to-severe pain is the needle-free, pre-programmed fentanyl HCl iontophoretic transdermal system. This system was shown in a recent US clinical trial to be comparable in efficacy to a standard regimen of morphine intravenous patient-controlled analgesia. Adverse events associated with the use of the fentanyl iontophoretic transdermal system are generally similar to those experienced by patients using intravenous morphine patient-controlled analgesia. Considerations regarding the selection of patients for treatment with the fentanyl iontophoretic transdermal system are similar to those with other patient-controlled analgesia modalities; sufficient upper limb mobility and alertness are required to operate the system. Utilization of the fentanyl iontophoretic transdermal system, together with the guidance of an effective acute pain service, may lead to improvements in postoperative pain management.
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PMID:Current practices for postoperative pain management in Europe and the potential role of the fentanyl HCl iontophoretic transdermal system. 1715 10

The fentanyl HCl iontophoretic transdermal system (fentanyl ITS) is a novel patient-controlled analgesia (PCA) system that has been approved in the USA and Europe for the management of acute, moderate-to-severe postoperative pain. This system extends the applicability of transdermal drug delivery to acute pain management, allowing patients to self-administer pre-programmed doses of fentanyl non-invasively through the use of iontophoretic technology. Iontophoresis is the process by which an electric current is used to drive ionized drug molecules across the skin and into the systemic circulation. Results of a recent US clinical trial found the fentanyl ITS to provide pain control equivalent to a standard regimen of morphine i.v. PCA, with a similar incidence of opioid-related adverse events. The fentanyl ITS may offer a number of clinical advantages over existing PCA modalities. Its method of drug delivery avoids the risk of complications from needle-related injuries and infection, and its pre-programmed electronics eliminate the potential for manual programming errors and excessive dosing. In addition, the compact size of the system could enable greater patient mobility following surgery. The fentanyl ITS has the potential to become a valuable option in the management of acute postoperative pain.
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PMID:Fentanyl HCl iontophoretic transdermal system (ITS): clinical application of iontophoretic technology in the management of acute postoperative pain. 1715 26

The fentanyl HCl iontophoretic transdermal system (ITS) is a compact, needle-free, pre-programmed patient-controlled analgesic system that was developed to address limitations to existing therapies for postoperative pain management. A randomized, controlled trial was conducted in 11 European countries to evaluate the efficacy and safety of postoperative pain control using fentanyl ITS compared with a standard regimen of morphine provided by an intravenous patient-controlled analgesia (IV PCA) pump. This article summarizes results from Nurse Ease-of-Care Questionnaires which were completed to assess the convenience and ease of use of each pain management modality from the perspective of the nurse. Nurses' ratings of patient-care tasks associated with each pain management system were significantly more favourable for fentanyl ITS than for morphine IV PCA. These findings suggest that nurses consider fentanyl ITS to be easier to use than morphine IV PCA.
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PMID:Nurses' views on ease of patient care in postoperative pain management. 1750 80

Postoperative pain management has dramatically improved with the advent of patient-controlled analgesia (PCA) delivery. The optimal PCA system would encompass several key characteristics, including consistent efficacy across a number of surgeries; safety of both the analgesic drug delivered and the delivery system; ease of setup, maintenance, and administration; patient comfort during analgesic delivery; avoidance of analgesic gaps; minimal invasiveness; and it would be associated with high patient satisfaction. Existing PCA modalities (using intravenous or epidural routes) encompass some of these characteristics (e.g., they have demonstrated efficacy across a number of surgeries); however, they are limited by the need for an indwelling catheter and the time and resources required for system setup and use. Device programming-related medication errors by hospital staff are an unfortunate risk, and could lead to significant harm. New PCA technologies are on the horizon that address some of the limitations to existing modalities; however, the added complexity of these newer systems are a concern, and their benefits and drawbacks remain to be assessed. These technologies include "smart" intravenous PCA infusion pumps to improve the safety of analgesic administration; needle-free options, such as the fentanyl HCl iontophoretic transdermal system for transdermal delivery; and a number of PCA devices for intranasal delivery, as well as several new options for patient-controlled regional analgesia. This review will discuss the benefits and drawbacks of both existing and emerging PCA modalities in the context of the ideal PCA system, and provide a critical evaluation of their use in postoperative settings.
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PMID:Patient-controlled drug delivery for acute postoperative pain management: a review of current and emerging technologies. 1829 96

Postoperative pain is an important parameter in discharge and rehabilitation in daycase arthroscopic knee surgery. This study compared the efficacy of intraarticular application of lornoxicam, bupivacaine and placebo on postoperative pain after arthroscopic knee surgery. With the approval of the local ethics committee and informed consent of the patients, 90 patients (ASA score I-II), aged between 18-65 years undergoing arthroscopic meniscectomy were included in this randomized, blinded, prospective study and were divided into three groups (30 patients each): 8 mg lornoxicam was applied to Group L (GL), 50 mg bupivacaine to Group B (GB) and normal saline to Group S (GS) in 20 mL volume intraarticularly. Postoperative analgesia was maintained by intravenous tramadol-HCl 50 mg/h at the first 4 h and then paracetamol 500 mg plus codeine 7.5 mg preparation as needed. The numeric rating scale (NRS) values were evaluated at rest and at active-passive motion at 4, 12, 24 and 48 h, total analgesic consumption were recorded. There were statistically significant differences between GS and GL and GS and GB in term of tramadol consumption (p < 0.05 and p < 0.05). The analgesiconsumption of GL patients at the end of 48 h were lower than GB and GS (p < 0.001 and p < 0.05). The NRS values of GL were always lower than the other groups with statistical significance at certain times. We concluded that intraarticular lornoxicam provided better pain control than bupivacaine and saline in arthroscopic knee surgery.
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PMID:[Comparison of analgesic activity of intraarticular lornoxicam, bupivacaine and saline after knee arthroscopy]. 1911 52


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