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Wirz S, Schenk M, Hofbauer H, Wartenberg HC, Cascella M, Kieselbach K. [Use of rapid-onset fentanyl preparations beyond indication : A random questionnaire survey among congress participants and pain physicians]. Schmerz 2020; 35:114-123. [PMID: 32975670 DOI: 10.1007/s00482-020-00503-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 07/18/2020] [Accepted: 08/19/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND Despite publicised advice and warnings, there are only scant data on the non-indicated prescription of rapid-onset preparations of fentanyl (ROF) in non-cancer pain (NCP). Powered by Editorial Manager® and ProduXion Manager® from Aries Systems Corporation. OBJECTIVE Initiated by the Working Group Cancer Pain and supported by the German Pain Society, a random sample survey was conducted to assess the non-indicated use of ROF. METHODS The survey addressed attendees of pain conferences who were given the option to fill in the questionnaires outside the conference or online. Primary endpoints of the structured questionnaire were quantitative and qualitative items with regard to the prescription of ROF, while secondary endpoints were opioid-induced side effects. RESULTS Obtaining a response rate of 44% (132/300) and an additional 51 online questionnaires revealed that 165 (90%) respondents had knowledge of non-indicated prescriptions or were involved in these. Of these, 65% were clinicians and 17% worked in an outpatient capacity. In all, 22% were trained pain or palliative physicians. Approximately 1205 patients were assessed indirectly. The main causes for dispensing ROF included NCP entities such as back pain (44%), neuropathic pain (33%), head or facial pain (12%), and dyspnea (5%) in cancer pain or lack of break-through pain or basic medication (44%). Sedation (32%), nausea/vomiting (31%), constipation (16%) and insufficient analgesia (31%) were the mostly commonly reported adverse effects. CONCLUSION Despite the non-ambiguous indication for ROF, physicians often demonstrate inappropriate prescription behaviour. Iatrogenic misuse of ROF should be minimized. The rates of adverse effects of ROF seems to be in line with other opioids.
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Affiliation(s)
- Stefan Wirz
- Abteilung für Anästhesie, Intensivmedizin, Schmerzmedizin/Palliativmedizin - Zentrum für Schmerzmedizin, Weaningzentrum, CURA Krankenhaus, Betriebsstätte der GFO-Kliniken Bonn, Schülgenstr. 15, 53604, Bad Honnef, Deutschland.
| | - Michael Schenk
- Zentrum für Integrative Medizin, Franziskus-Krankenhaus Berlin, Budapester Str. 15-19, 10787, Berlin, Deutschland
| | - Hannes Hofbauer
- Sektion Schmerztherapie, Klinik für Anästhesiologie, Universitätsklinikum Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Deutschland
| | - Hans-Christian Wartenberg
- Afdeling Anesthesiologie H1-115, Academisch Medisch Centrum, Universiteit van Amsterdam, Meibergdreef 9, NL-1105 AZ, Amsterdam, Niederlande
| | - Marco Cascella
- Division of Anesthesia and Pain Medicine, Istituto Nazionale Tumori, IRCCS. Fondazione G. Pascale, Via Mariano Semmola 52, 80131, Napoli, Italien
| | - Kristin Kieselbach
- Interdisziplinäres Schmerzzentrum ISZ, Universitätsklinikum Freiburg, Breisacherstr. 117, 79106, Freiburg, Deutschland
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Yen TY, Chiou JF, Chiang WY, Su WH, Huang MY, Hu MH, Wu SC, Lai YL. Proportional dose of rapid-onset opioid in breakthrough cancer pain management: An open-label, multicenter study. Medicine (Baltimore) 2018; 97:e11593. [PMID: 30045291 PMCID: PMC6078661 DOI: 10.1097/md.0000000000011593] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND The management of breakthrough pain (BTP) in cancer patients is a challenge. It is clinically useful to evaluate the effectiveness of rapid-onset opioid at a starting dose in proportional to the background opioid regimen. This open-label, multicenter, noncomparative study aimed to assess the efficacy and safety of proportional doses of fentanyl buccal soluble film (FBSF) in patients with breakthrough cancer pain. METHODS Thirty patients aged 20 to 70, experiencing 1 to 3 BTP per day, receiving regimens equivalent to 60 to 360 mg/day of oral morphine or 25 to 150 μg/h of transdermal fentanyl ≥1 week, were prospectively recruited. FBSF was administered proportionally based on their current opioid regimen for baseline pain. The percentage of patients requiring dose titration was evaluated. For each BTP episode, changes in pain intensity at 30 minutes (PID30) after dosing, patient's satisfaction, the percentage of episodes requiring rescue medication, and adverse events (AEs) were recorded. RESULTS The percentage of patients who required dose titration was 21.4% (6/28) and 12.0% (3/25) in the full analysis set and per-protocol populations, respectively. The average PID30 was 3.9, and a pain score ≤3 was achieved in 95.1% of the events. Eight out of 367 (2.2%) BTP episodes needed rescue medication. The majority of subjects (75.8%) rated their experience of pain management as good to excellent. A total of 6 drug-related AEs were reported by 3 (10.7%) patients in the safety population. CONCLUSIONS FBSF dose in proportional to the regimen of opioid for baseline pain management is efficacious and well tolerated for the treatment of cancer patients with BTP.
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Affiliation(s)
- Tsung-Yu Yen
- Department of Radiation Oncology
- Hospice and Palliative Care Center, MacKay Memorial Hospital
| | - Jeng-Fong Chiou
- Department of Radiology, School of Medicine, College of Medicine, Taipei Medical University
- Department of Radiation Oncology, Taipei Medical University Hospital
- Taipei Cancer Center, Taipei Medical University
- Cancer Center, Taipei Medical University Hospital, Taipei
| | | | - Wen-Hao Su
- Hospice and Palliative Care Center, MacKay Memorial Hospital
| | - Ming-Yuan Huang
- Hospice and Palliative Care Center, MacKay Memorial Hospital
| | - Ming-Hung Hu
- Division of Hematology and Oncology, Department of Medicine, Cardinal Tien Hospital
- School of Medicine, Fu Jen Catholic University, New Taipei
| | - Shen-Chi Wu
- Cancer Center, Taipei Medical University Hospital, Taipei
- Department of Hospice and Palliative Care, Taipei
| | - Yuen-Liang Lai
- Department of Radiation Oncology
- Hospice and Palliative Care Center, MacKay Memorial Hospital
- MacKay Medical College, New Taipei, Taiwan
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Prevalence and Characterization of Breakthrough Pain Associated with Chronic Low Back Pain in the South of Spain: A Cross-Sectional, Multicenter, Observational Study. PAIN RESEARCH AND TREATMENT 2018; 2018:4325271. [PMID: 29850241 PMCID: PMC5937435 DOI: 10.1155/2018/4325271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 02/02/2018] [Accepted: 03/17/2018] [Indexed: 11/17/2022]
Abstract
Chronic low back pain (CLBP) is highly prevalent in industrialized countries, where it is one of the main causes of disability. Patients with CLBP in treatment with opioids often experience episodes of breakthrough pain (BTP), but data on prevalence and treatment preferences are scarce. The objectives of this study were, first, the evaluation of the prevalence of BTP in patients with CLBP in the South of Spain (N = 1,868) and, second, the characterization of BTP in these patients (N = 295). Data was collected on presence of BTP, type and location of pain, treatment, compliance, and patient satisfaction. We found a prevalence of BTP in patients with CLBP of 37.5% (95% CI: 35.3%–39.7%), similar in men and women. 75% of the patients were older than 50 years. The preferred drug of patients who control BTP with opioids is fentanyl (78.3%) and its most common form of administration is nasal (53.2%). Therapeutic compliance was high and 46.3% of patients considered the control of their BTP very satisfactory. Our study showed that BTP is common in patients with CLBP and that current treatments seem adequate.
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Kwon MY, Cho HN, Koo DH, Lee YG, Oh S, Lee SS. Initial titration with 200 μg fentanyl buccal tablets: a retrospective safety analysis in Korean cancer patients. Korean J Intern Med 2018; 33:577-584. [PMID: 28111431 PMCID: PMC5943645 DOI: 10.3904/kjim.2016.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 08/26/2016] [Accepted: 09/28/2016] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND/AIMS Managing breakthrough pain (BTP) is important for many cancer patients because of the rapid onset and unpredictable nature of the pain episodes. Fentanyl buccal tablets (FBTs) are a rapid-onset opioid indicated for BTP management. However, FBT titration is needed to optimize BTP management. In this study, we aimed to evaluate the safety and efficacy of initiating 200 μg FBTs in Korean cancer patients. METHODS A retrospective analysis of medical records was performed on all advanced cancer patients treated with FBTs for BTP between October 2014 and July 2015. Patients who received initial doses of 200 μg FBTs for at least 3 days and cases in which FBT was available at doses of 200, 400, and 800 μg were included. RESULTS A total of 56 patients with a median age of 62 years (range, 32 to 80) were analyzed, 61% of whom were male. The median and mean values of morphine equivalent daily doses were 60 mg/day (range, 15 to 540) and 114.8 ± 124.8 mg/day, respectively. The most frequent effective doses of FBT were 200 μg (41 patients, 74%) and 400 μg (12 patients, 21%). Three patients (5%) could not tolerate 200 μg of FBT and discontinued treatment. Nausea, vomiting, somnolence, and dizziness were the most frequent treatment-related adverse events (AEs), and all AEs were grade 1 (mild) or 2 (moderate). CONCLUSIONS FBT at the initial 200 μg dosage was well-tolerated and effective as a BTP management strategy in Korean cancer patients. Further prospective studies are needed to determine appropriate initiating doses of FBT in Korean patients with opioid tolerance.
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Affiliation(s)
- Mi-Young Kwon
- Department of Anesthesiology and Pain Medicine, National Medical Center, Seoul, Korea
| | - Ha-Na Cho
- Department of Anesthesiology and Pain Medicine, National Medical Center, Seoul, Korea
| | - Dong-Hoe Koo
- Division of Hematology and Oncology, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
- Correspondence to Dong-Hoe Koo, M.D. Division of Hematology and Oncology, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, 29 Saemunan-ro, Jongno-gu, Seoul 03181, Korea Tel: +82-2-2001-8330 Fax: +82-2-2001-8360 E-mail:
| | - Yun-Gyoo Lee
- Division of Hematology and Oncology, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sukjoong Oh
- Division of Hematology and Oncology, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Seung-Sei Lee
- Division of Hematology and Oncology, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
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Passik SD, Narayana A, Yang R. Aberrant Drug-Related Behavior Observed During a 12-Week Open-Label Extension Period of a Study Involving Patients Taking Chronic Opioid Therapy for Persistent Pain and Fentanyl Buccal Tablet or Traditional Short-Acting Opioid for Breakthrough Pain. PAIN MEDICINE 2014; 15:1365-72. [DOI: 10.1111/pme.12431] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kestenbaum MG, Vilches AO, Messersmith S, Connor SR, Fine PG, Murphy B, Davis M, Muir JC. Alternative routes to oral opioid administration in palliative care: a review and clinical summary. PAIN MEDICINE 2014; 15:1129-53. [PMID: 24995406 DOI: 10.1111/pme.12464] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
OBJECTIVE A major goal of palliative care is to provide comfort, and pain is one of the most common causes of treatable suffering in patients with advanced disease. Opioids are indispensable for pain management in palliative care and can usually be provided by the oral route, which is safe, effective, and of lowest cost in most cases. As patients near the end of life, however, the need for alternate routes of medication increases with up to 70% of patients requiring a nonoral route for opioid administration. In order to optimize patient care, it is imperative that clinicians understand existing available options of opioid administration and their respective advantages and disadvantages. METHODS We performed a literature review to describe the most commonly used and available routes that can substitute for oral opioid therapy and to provide a summary of factors affecting choice of opioid for use in palliative care in terms of benefits, indications, cautions, and general considerations. RESULTS Clinical circumstances will largely dictate appropriateness of the route selected. When the oral route is unavailable, subcutaneous, intravenous, and enteral routes are preferred in the palliative care population. The evidence supporting sublingual, buccal, rectal, and transdermal gel routes is mixed. CONCLUSIONS This review is not designed to be a critical appraisal of the quality of current evidence; rather, it is a summation of that evidence and of current clinical practices regarding alternate routes of opioid administration. In doing so, the overarching goal of this review is to support more informed clinical decision making.
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Efficacy and safety of sublingual fentanyl orally disintegrating tablets in patients with breakthrough pain: multicentre prospective study. Clin Drug Investig 2014; 33:675-83. [PMID: 23881567 DOI: 10.1007/s40261-013-0111-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
BACKGROUND AND OBJECTIVES The aim of this study was to evaluate the effectiveness and safety of sublingual fentanyl oral disintegrating tablets (sublingual fentanyl ODT) for the treatment of breakthrough pain (BTP), cancer or non-cancer related, in terms of relief of pain intensity, adverse events (AEs) and patient satisfaction, and to further examine the clinical and epidemiological profile of patients with BTP in a clinical setting. METHODS A multicentre, prospective, open-label study was conducted in 19 pain units from Catalonia hospitals (Spain) over a 1-month period. Opioid-tolerant adult patients experiencing episodes of BTP intensity >5 on a visual analogue scale (VAS) during the 12-24 h before screening or AEs related to their previous rescue medication for BTP received sublingual fentanyl ODT in the course of routine clinical practice and completed a 30-day study period consisting of five assessment points: days 0 (baseline), 3, 7, 15 and 30. The efficacy was assessed by collecting pain intensity and pain relief data at baseline and at each assessment. AEs were recorded by investigators throughout the study during clinic visits and telephone follow-ups. For all patients, titration was begun with an initial dose of 100 μg. No more than two doses were allowed to treat an episode and patients might wait at least 4 h before treating another BTP episode with sublingual fentanyl ODT. The dose was increased by 100 μg multiples up to 400 μg as needed; and by 200 μg multiples up from 400 to 800 μg, the maximum titration step. RESULTS A total of 182 patients were enrolled and 177 (97.2 %) completed the study: 37 had breakthrough cancer pain (BTcP) and 145 had breakthrough non-cancer pain (BTncP). The mean pain intensity showed a statistically significant improvement at the first assessment point and at all assessments thereafter (p < 0.0001). At the end of the study, the time lag between administration and first effect of sublingual fentanyl ODT was ≤10 min in 69.0 % (60 % BTcP and 71.2 % BTncP). The number of daily BTP episodes decreased in both groups, but it was statistically significant in BTcP. 114 patients (62.64 %) experienced AEs during the study. AEs recorded included nausea, vomiting, somnolence and constipation, and seven (4.49 %) were considered severe. No death or discontinuation was considered related to AEs. CONCLUSION Sublingual fentanyl ODT provided rapid and consistent relief from BTP, both in cancer and non-cancer patients. It was well-tolerated and well-accepted by patients in routine clinical practice.
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Scharnagel R, Kaiser U, Schütze A, Heineck R, Gossrau G, Sabatowski R. [Chronic non-cancer-related pain. Long-term treatment with rapid-release and short-acting opioids in the context of misuse and dependency]. Schmerz 2014; 27:7-19. [PMID: 23340881 DOI: 10.1007/s00482-012-1278-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Annually published data show a continual increase in the volume of opioid prescriptions in Germany, thus indicating an intensification of opioid therapy. The majority of opioids are prescribed to treat chronic non-cancer-related pain. On the basis of current guidelines, as well as in terms of the lack of data regarding long-term use of opioids and their effectiveness beyond a period of 3 months, this development must be viewed critically. With reference to four case reports, we discuss and evaluate opioid therapy in relation to medication misuse and the development of drug dependency. Particular emphasis is placed on the administration of rapid-release and short-acting opioid preparations, which we consider to be particularly problematic.
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Affiliation(s)
- R Scharnagel
- UniversitätsSchmerzCentrum, Universitätsklinikum Carl Gustav Carus, Fetscherstr. 74, 01307, Dresden, Deutschland.
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Webster LR, Slevin KA, Narayana A, Earl CQ, Yang R. Fentanyl Buccal Tablet Compared with Immediate-Release Oxycodone for the Management of Breakthrough Pain in Opioid-Tolerant Patients with Chronic Cancer and Noncancer Pain: A Randomized, Double-Blind, Crossover Study Followed by a 12-Week Open-Label Phase to Evaluate Patient Outcomes. PAIN MEDICINE 2013; 14:1332-45. [DOI: 10.1111/pme.12184] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Bornemann-Cimenti H, Wejbora M, Szilagyi IS, Sandner-Kiesling A. Fentanyl for the treatment of tumor-related breakthrough pain. DEUTSCHES ARZTEBLATT INTERNATIONAL 2013; 110:271-7. [PMID: 23671467 DOI: 10.3238/arztebl.2013.0271] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Accepted: 12/17/2012] [Indexed: 11/27/2022]
Abstract
BACKGROUND Breakthrough cancer pain (BTCP) is common among cancer patients and markedly lowers their quality of life. The treatment for BTCP episodes that is recommended in current guidelines involves extended-release formulations in combination with rapid-onset and short-acting opioids. In the past few years, several new preparations of fentanyl, an opioid with a very rapid onset, have been approved for this indication. Treating physicians need to be aware of the clinical differences between the newer fentanyl preparations and immediate-release opioids. METHODS We searched the PubMed and Embase databases for randomized controlled trials (RCTs) of fentanyl for buccal, sublingual or intranasal administration in comparison with other opioids or a different fentanyl preparation for the treatment of BTCP. RESULTS In 6 trials of buccal, sublingual or intranasal fentanyl versus oral immediate-release opioids for the treatment of BTCP episodes, the use of fentanyl was associated with significantly less intense pain. In particular, fentanyl more often lowered the intensity of pain by at least 33% (range between studies: 13% to 57%) or by at least 50% (range between studies: 9% to 38%) within 15 minutes. Please change to "versus" if you agree.] Dose titration should begin at the lowest dose. When one fentanyl preparation is exchanged for another, the effective dose will probably differ. CONCLUSION The newer fentanyl preparations extend the treatment options for BTCP. They relieve pain within a short time better than conventional, immediate-release oral opioids do and may therefore be very helpful for patients with suddenly arising, intense, and short-lasting BTCP episodes. Further comparative trials are urgently needed.
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The management of wound-related procedural pain (volitional incident pain) in advanced illness. Curr Opin Support Palliat Care 2013; 7:80-5. [DOI: 10.1097/spc.0b013e32835ac704] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Perret D, Rosen C. A physician-driven solution--the Association for Medical Ethics, the Physician Payment Sunshine Act, and ethical challenges in pain medicine. PAIN MEDICINE 2012; 12:1361-75. [PMID: 21914121 DOI: 10.1111/j.1526-4637.2011.01217.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The practice of contemporary pain medicine is laced with a number of significant ethical challenges. Considerable difficulties include the overutilization of interventional procedures, the application of under-evidenced treatment modalities, and potentially superfluous opioid prescribing. As with many other fields in medicine, including orthopedic surgery, relationships with industry are both common and pervasive, and influence our medical practice through education, publications, and research. This article highlights these ethical challenges and broaches several physician-driven solutions: The Association for Medical Ethics, the Physicians Payment Sunshine inspired by it, and other non-legislative reforms are discussed.
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Affiliation(s)
- Danielle Perret
- Department of Anesthesiology & Perioperative Care, University of California, Irvine, School of Medicine, Orange, California, USA
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Abstract
The strategies used to manage children exposed to long-term opioids are extrapolated from adult literature. Opioid consumption during the perioperative period is more than three times that observed in patients not taking chronic opioids. A sparing use of opioids in the perioperative period results in both poor pain management and withdrawal phenomena. The child's pre-existing opioid requirement should be maintained, and acute pain associated with operative procedures should be managed with additional analgesia. This usually comprises short-acting opioids, regional or local anesthesia, and adjuvant therapies. Long-acting opioids, transdermal opioid patches, and implantable pumps can be used to maintain the regular opioid requirement. Intravenous infusion, nurse controlled analgesia, patient-controlled analgesia, or oral formulations are invaluable for supplemental requirements postoperatively. Effective management requires more than simply increasing opioid dose during this time. Collaboration of the child, family, and all teams involved is necessary. While chronic pain or palliative care teams and other staff experienced with the care of children suffering chronic pain may have helpful input, many pediatric hospitals do not have chronic pain teams, and many patients receiving long-term opioids are not palliative. Acute pain services are appropriate to deal with those on long-term opioids in the perioperative setting and do so successfully in many centers. Staff caring for such children in the perioperative period should be aware of the challenges these children face and be educated before surgery about strategies for postoperative management and discharge planning.
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Affiliation(s)
- Tim Geary
- Department of Anaesthesia, Starship Children's Hospital, Auckland, New Zealand
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Abstract
The purpose of this article is to systematically review the use of fentanyl as an analgesic for breakthrough pain. This article found that the oral transmucosal fentanyl (OTFC) had a quicker onset to analgesia than oral immediate-release opioids. Intranasal fentanyl (INFS) had a quicker onset to analgesia than buccal tablets, which in turn had a quicker onset to analgesia than OTFC. Patient acceptance and global rating of efficacy were greater for INFS than for buccal fentanyl. OTFC and INFS have been used effectively to reduce acute pain in children who are opioid-naive. Abuse and addiction to OTFC, fentanyl buccal tablets and INFS was low, owing to patient selection.
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Affiliation(s)
- Mellar P Davis
- Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, The Harry R Horvitz Center for Palliative Medicine, Cleveland, OH 44195, USA.
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Current world literature. Curr Opin Support Palliat Care 2011; 5:174-83. [PMID: 21521986 DOI: 10.1097/spc.0b013e3283473351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Davis MP. Opioid tolerance and hyperalgesia: basic mechanisms and management in review. PROGRESS IN PALLIATIVE CARE 2011. [DOI: 10.1179/174329111x13045147380537] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Current world literature. Curr Opin Support Palliat Care 2011; 5:65-8. [PMID: 21321522 DOI: 10.1097/spc.0b013e3283440ea5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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