Conventional Pain Management Research Articles

The Hopeless Case? Palliative Cryoablation and Cementoplasty Procedures for Palliation of Large Pelvic Bone Metastases

Background: Metastases to the bone are common in cancer patients, and it has been estimated that up to 50% of patients with pelvic bone metastases will not achieve adequate pain control with medications alone. This has led to a paradigm shift over recent years towards the use and development of minimally invasive image-guided treatment options for palliation of bony metastases. Despite these developments, large metastatic lesions are still often considered to be “hopeless cases” that would garner little to no benefit from image-guided intervention. This study is the first large series to describe the novel use of combination percutaneous cryoablation and cementoplasty for palliation of such large metastases to the pelvis. Objectives: We aim to evaluate the efficacy and safety of image-guided percutaneous cryoablation and cementoplasty for palliation of large pelvic bone metastases. Study Design: This retrospective analysis was approved by our institutional review board. This study was conducted from January 2013 to December 2016, where consecutive patients referred for pain management of large pelvic bone metastases underwent combination percutaneous cryoablation and cementoplasty. Setting: This study took place at a tertiary care center after patients were referred following formal review from a multidisciplinary conference, which was comprised of interventional radiologists, pain management and palliative care physicians, radiation and medical oncologists, and when available, anesthesiologists. Methods: Forty-eight patients (36 men and 12 women) with a mean cohort age of 77.5 years (range: 52 – 89 years) were referred from the multidisciplinary conference for palliation of pelvic bone metastases. The inclusion criteria included patients with metastases greater or equal to 5.0 cm and significant pain refractory to conventional pain management regimens. All of the patients were deemed not to be surgical candidates. Mean pain scores were collected at numerous time-points along with procedural technical success rates and complication rates. Results: Combination cryoablation and cementoplasty was performed on 48 consecutively referred patients with a 100% technical success rate and no immediate complications. The pain levels demonstrated a significant decrease (P < 0.001) following intervention, with mean pain scores of 7.9 (range: 5 – 10) and 1.2 (range: 0 – 7) throughout the week prior to intervention and at 24 hours postintervention, respectively. The post-intervention pain scores remained stable at 1 to 9 weeks followup (mean: 4.1 weeks). Three patents (6.3%) reported no change in pain following the intervention; however, no patients reported worsened pain. Limitations: The limitations of this study include its retrospective nature and the length of follow-up, which was often restricted given the life expectancy of our patient cohort. Conclusion: Combination cryoablation and cementoplasty is a novel and efficacious treatment option for palliation of large pelvic bone metastases. Marked improvements in pain, as well as mobility and quality of life, are often attainable. Key words: Pain, palliative care, palliation, percutaneous, cryoablation, cementoplasty, metastases, pelvis, interventional radiology, thermal ablation

Multimodal Analgesia in Outpatient Head and Neck Surgery

Importance Perioperative analgesia strategies that rely solely on narcotics may contribute to adverse effects and concerns about opioid abuse or dependence. Multimodal analgesia protocols incorporating nonnarcotic agents may reduce the need for postoperative narcotic use. Objective To evaluate the feasibility and safety of a multimodal analgesia protocol for outpatient head and neck surgical procedures and to identify the association of the multimodal analgesia protocol with postoperative pain perception scores and patient satisfaction. Design, Setting, and Participants Retrospective evaluation of prospectively collected data on adults who underwent outpatient thyroid, parathyroid, and parotid surgery between July 2016 and February 2017 at the head and neck surgery service of a tertiary care hospital using a multimodal analgesia strategy with use of immediate preoperative acetaminophen and gabapentin, and intention to treat with a nonnarcotic postoperative outpatient analgesia strategy. Main Outcomes and Measures Overall patient satisfaction scores, Overall Benefit of Analgesia Score (OBAS), and median resting and peak pain scores were recorded. Incidence of reliance on a narcotic-based postoperative outpatient analgesia strategy and adverse events related to altered analgesia strategy were identified. Results Sixty-four patients (48 [75%] female; mean [SD] age, 54.6 [14.3] years) underwent outpatient thyroid, parathyroid, or parotid surgery with use of a multimodal analgesia protocol. On a 10-point rating scale, patients reported low resting pain perception scores (median, 2 [range, 0-8]) and peak pain scores (median, 4 [range, 0-9]). The OBAS assessment for composite effectiveness of analgesia indicated a favorable median score of 1 (range, 0-10; permissible range, 0-28, with lower scores better). Thirty-nine (61%) patients were able to avoid postoperative narcotic use on discharge. Fifty-six (88%) patients reported “high” or “very high” satisfaction with the multimodal analgesia strategy. No complications related to bleeding, hematoma, significant adverse events, or readmissions were observed. Conclusion and Relevance A multimodal analgesia strategy was feasible and safe in patients undergoing outpatient head and neck surgery and may reduce the need for narcotic use. It was associated with low pain perception scores, favorable OBAS, and overall satisfaction scores. The role of multimodal analgesia needs additional evaluation through comparative effectiveness assessment vs conventional pain management strategies.

The rationale, design, and methods of a randomized, controlled trial to evaluate the effectiveness of collaborative telecare in preserving function among patients with late stage cancer and hematologic conditions

Disablement affects over 40% of patients with advanced stage cancer, devastates their quality of life (QoL), and increases their healthcare costs. Proactively treating the causes of disablement; physical impairments, pain, and immobility, can prolong functional independence, improve QoL and, potentially, reduce utilization. However rehabilitation service delivery models are reactive in nature and focus on catastrophic rather than incipient disability. A validated collaborative approach, the Three Component Model (TCM), optimizes important clinical outcomes and may provide an ideal framework to overcome barriers to proactively integrating rehabilitation into cancer care. A novel expansion of the TCM that targets disablement by engaging local physical therapists to address physical impairments and immobility, the TCM-Rehabilitation Services (TCM-RS), benefits and is well received by patients. However, its effectiveness has not been rigorously assessed. The 3-arm randomized COllaborative Care to Preserve PErformance in Cancer (COPE) Trial compared: 1) enhanced usual care, 2) rehabilitation services targeting physical impairments and immobility via the TCM-RS, and 3) TCM-RS plus conventional TCM pain management TCM-RS+Pain. Of the 516 participants, those randomized to arms 2 and 3 underwent an initial 4-week intervention period and were then followed for 6months with remote monitoring and monthly telephone calls. The trial's primary outcome, functional status, and secondary outcomes were assessed at baseline, 3, and 6months. Utilization was abstracted from clinical records. By estimating the effectiveness and cost-utility implications of the TCM-RS and TCM-RS+Pain, COPE will inform future delivery research, practice and policy in the means to reduce disablement in chronically diseased populations.

The effect of pain self-management based on pain control diary on breakthrough pain.

10107 Background: Most patients suffer from cancer pain, especially breakthrough pain. The overall incidence of breakthrough pain is estimated to be 65%. Self-management makes patients actively participating in the use of drugs, transforming their roles and adjusting their moods in order to better cure their own diseases. Therefore, the aim of the study is to discuss the effect of reducing cancer pain patients' breakthrough pain through self-management based on pain control diary. Methods: From October, 2015 to October, 2016, a total of 200 patients treated with opioids for cancer pain were randomly divided into groups. Patients in the control group were given general management including the Standard "the three steps analgesic ladder treatment for cancer pain", the traditional form of health education and psychological care; While the intervention group in addition to conventional cancer pain management, self-management based on pain control diary was applied. Through repeated intensive training, patients learned how to do self-assessment, to master the feature of their own pain, problem-solving skills and formal report to their oncologists in charge. Results: After six weeks of intervention , 10% patients in the intervention group had suffer breakthrough pain compared with 54% patients in the control group (P < 0.05). The whole processing management model is a whole process, specialization and humanization Care model for patients with advanced cancer pain management, can effectively improve patient medication compliance, reduce the cancer breakthrough pain's incidence, improve the patients,s life quality with cancer pain. The medication compliance of the intervention group was significantly higher than that of the control group(X2= 46.606, P<0.001), and in intervention group the incidence of breakthrough pain was significantly lower than that of the control group (X2= 44.148, P<0.001) Conclusions: The self management based on pain control diary is a whole process, specialization and humanization Care model for patients with advanced cancer pain management, can effectively improve patient medication compliance, reduce the cancer breakthrough pain's incidence, improve the patients's life quality with cancer pain.

Femoral nerve block in a representative sample of elderly people with hip fracture: A randomised controlled trial

IntroductionThe number of elderly people with hip fracture and dementia is increasing, and many of these patients suffer from pain. Opioids are difficult to adjust and side effects are common, especially with increased age and among patients with dementia. Preoperative femoral nerve block is an alternative pain treatment. AimTo investigate whether preoperative femoral nerve block reduced acute pain and opioid use after hip fracture among elderly patients, including those with dementia. Patients and methodsIn this randomised controlled trial involving patients aged ≥70years with hip fracture (trochanteric and cervical), including those with dementia, we compared femoral nerve block with conventional pain management, with opioid use if required. The primary outcome was preoperative pain, measured at five timepoints using a visual analogue scale (VAS). Preoperative opioid consumption was also registered. ResultsThe study sample comprised 266 patients admitted consecutively to the Orthopaedic Ward. The mean age was 84.1 (±6.9)years, 64% of participants were women, 44% lived in residential care facilities, and 120 (45.1%) had dementia diagnoses. Patients receiving femoral nerve block had significantly lower self-rated pain scores from baseline to 12h after admission than did controls. Self-rated and proxy VAS pain scores decreased significantly in these patients from baseline to 12h compared with controls (p<0.001 and p=0.003, respectively). Patients receiving femoral nerve block required less opioids than did controls, overall (2.3±4.0 vs. 5.7±5.2mg, p<0.001) and in the subgroup with dementia (2.1±3.3 vs. 5.8±5.0mg, p<0.001). ConclusionPatients with hip fracture, including those with dementia, who received femoral nerve block had lower pain scores and required less opioids before surgery compared with those receiving conventional pain management. Femoral nerve block seems to be a feasible pain treatment for elderly people, including those with dementia.

Improvement of recovery parameters using patient-controlled epidural analgesia after oncological surgery. A prospective, randomized single center study.

The aim of this study was to compare patient-controlled epidural analgesia (PCEA) versus conventional opioid intravenous (IV) infusion after gastrointestinal cancer surgery regarding several post-surgery parameters of recovery. One hundred and one patients were prospectively randomized to receive either thoracic/lumbar PCEA (PCEA group) or the standard analgesia technique used in our hospital, conventional IV infusion of morphine (IVMO group) after gastrointestinal cancer surgery. Pain intensity, time of mobilization and bowel function recovery were analyzed post-surgery. We also evaluated postoperative complications and length of Postoperative-Intermediate Intensive Care Unit (PI-ICU) stay and hospital stay. Pain intensity was significantly less in the PCEA group in comparison with the IVMO Group at awakening 2, 8, 24, 30 and 48 hours after surgery (p <0.001, p <0.001, p <0.001, p = 0.043, p = 0.036, and p = 0.029, respectively). The latency to bedside mobilization, walking, first postoperative flatus and apparition of first stool were significantly faster (1.74 versus 2.26 days, 3.06 versus 3.78 days, 2.1 versus 3.14 days and 3.73 versus 5.28 days, respectively) in the PCEA group than in the IVMO group (p <0.001, p <0.001, p <0.001, and p <0.001, respectively). The incidence of nausea/vomiting was significantly lower in the PCEA group in comparison with the IVMO group (p = 0.001). Surgical-associated complications were significantly lower in the IVMO Group than in the PCEA group (p = 0.023). Length of PI-ICU stay was similar in the two groups but length of hospital stay was significantly shorter in PCEA group (4 versus 5 days p = 0.2849, 9 versus 12 days; p <0.001). PCEA provides better postoperative pain control, improves postoperative recovery after gastrointestinal cancer surgery compared with conventional intravenous morphine infusion. Therefore, it is more acceptable than conventional pain management.

Laparoscopic-assisted Rectus Sheath Block as a Novel Technique is Effective and Safe: A Randomized Controlled Trial.

We developed laparoscopic-assisted rectus sheath block (LRSB) as a novel technique and report on its safety and effectiveness. Patients were randomly enrolled to an LRSB or control group (n=19 each). In the LRSB group, after the umbilical wound was closed, local anesthetic was injected transcutaneous at each of 4 sites (3 cm above and below the umbilicus bilaterally) with 10 mL of 0.25% levobupivacaine, laparoscopically. The control group received conventional postoperative pain management. The primary endpoint was visual analogue scale (VAS) pain score at the end of surgery. Secondary endpoints were VAS and Prince Henry pain scale after surgery, number of administrations of analgesics, and side effects of anesthesia. No significant differences in background were seen between groups. VAS at the end of surgery was significantly lower in the LRSB group than in controls (P<0.01). VAS and Prince Henry pain scale were significantly lower in the LRSB group from soon after surgery to postoperative day 2. No complications related to LRSB were encountered. LRSB was particularly effective at the end of surgery and pain scores were significantly lower in the LRSB group long after surgery. Our study shows LRSB is effective and safe for laparoscopic abdominal surgery.

Terminal cancer pain intractable by conventional pain management can be effectively relieved by intrathecal administration of a local anaesthetic plus an opioid and an alfa2-agonist into the cerebro-spinal-fluid

Terminal cancer pain intractable by conventional pain management can be effectively relieved by intrathecal administration of a local anaesthetic plus an opioid and an alfa2-agonist into the cerebro-spinal-fluid

Multimodal intrathecal analgesia in refractory cancer pain

Background and aimsCancer pain treatment has improved over the last decades. The majority of this population can be treated effectively with analgesics following the Guidelines of the original World Health Organisation (WHO). Unfortunately 10–15% of these patients still suffer from severe and refractory cancer pain, especially in the terminal phases of disease and require additional pain management modalities. Therefore, end-stage clinical interventions are particularly needed to minimize the perception of pain. With intrathecal therapy (ITT), drugs are delivered close to their site of action in the central nervous system avoiding first-pass metabolism and blood–brain barrier. It may improve analgesia with a smaller dose and possibly achieve a reduction in systemic or cerebral side effects compared to oral supplied medication alone. Multimodal analgesia enables further dose reduction with improved analgesia and fewer side effects. MethodsIn this retrospective research we investigated the effectiveness and side-effect profile of intrathecal morphine, bupivacaine and clonidine. Patients were followed until death occurred. Pain scores and side effects were recorded before initiating ITT (T0), just after initiating ITT (T1), at hospital discharge (T2), in the ambulant setting (T3) and the last obtained scores before death occurred (T4). ResultsNine patients were included who suffered from severe and refractory cancer pain, not reacting to conventional pain management or had intolerable side effects. Primary tumour location was pancreatic (4), urothelial (3) and prostate (2). Primary pain was considered neuropathic or mixed neuropathic-nociceptive. The treatment team consisted of an anaesthetist, specialized nurse in coordination with primary physician, treating oncologist and specialized home care.All patients were free of pain after initiation of the intrathecal therapy. The average follow-up period was 11 weeks in which there was a slight increase in NRS-score. In the last days before death occurred, half the patients were still free of pain. There were no problems during insertion of the catheter, device malfunction or infection. No severe adverse events defined as hypotension requiring inotropes, respiratory depression or neurological deficits were observed. Three patients experienced mild hypotension which gradually decreased after clonidine dose adjustment. Lower extremity weakness occurred in three patients as well. After bupivacaine dose adjustment the weakness disappeared in two patients and in one patient the lower extremity weakness persisted as a result of conus compression by tumour. Conclusion and implicationsMultimodal IT treatment with morphine, bupivacaine and clonidine is effective and safe for treating refractory cancer pain in the terminal phase of disease.The study offers an important contribution to literature where there is still lack of convincing evidence about the benefits and harms of this type of pain management in patients with otherwise refractory cancer pain.

Intravenous lidocaine for acute pain: an evidence-based clinical update

### Key points Poorly controlled acute pain remains one of the most undesirable consequences after surgery. Despite increased awareness and widespread efforts to address this, reports continue to estimate that a significant number of patients undergoing surgery experience moderate to severe pain, with a majority of them expressing dissatisfaction with their pain management.1 Advances in multimodal analgesia have largely replaced conventional opioid mono-therapy, but continued reliance on opioids to manage postoperative pain may at least partly explain the inadequacy of conventional acute pain management. Almost 30 yr ago, the well-known ‘WHO Step Ladder’ was introduced and has since become a widely accepted concept for rational pain management. This concept has had a major impact on developing the current rationale for the management of acute pain by introducing the concept of multimodal analgesia, highlighting the importance of determining pain severity, encouraging step-wise pain management, and suggesting a wider role for adjuvant agents. Even the origins of the more current concept of opioid-sparing analgesia can probably be traced back to this WHO Step Ladder. The role of analgesic adjuvants in perioperative pain management, notably ketamine, lidocaine, and the gabapentinoids, continues to be explored. In most situations, the use of these drugs allows for further significant decrease in the requirement or reliance on opioids for adequate …

A Prospective Randomized Controlled Trial of Nonpharmacological Pain Management During Intravenous Cannulation in a Pediatric Emergency Department.

Intravenous (IV) cannulation is commonly performed in pediatric emergency departments (EDs). The busy ED environment is often not conducive to conventional nonpharmacological pain management. This study assessed the use of Ditto (Diversionary Therapy Technologies, Brisbane, Australia), a handheld electronic device which provides procedural preparation and distraction, as a means of managing pain and distress during IV cannulation performed in the pediatric ED. A randomized controlled trial with 98 participants, aged 3 to 12 years, was conducted in a pediatric ED. Participants were recruited and randomized into 5 intervention groups as follows: (1) Standard Distraction, (2) PlayStation Portable Distraction, (3) Ditto Distraction, (4) Ditto Procedural Preparation, and (5) Ditto Preparation and Distraction. Children's pain and distress levels were assessed via self-reports and observational reports by caregivers and nursing staff across the following 3 time points: (1) before, (2) during, and (3) after IV cannulation. Caregivers and nursing staff reported significantly reduced pain and distress levels in children accessing the combined preparation and distraction Ditto protocol, as compared to standard distraction (P ≤ 0.01). This intervention also saw the greatest reduction in pain and distress as reported by the child. Caregiver reports indicate that using the combined Ditto protocol was most effective in reducing children's pain experiences while undergoing IV cannulation in the ED. The use of Ditto offers a promising opportunity to negotiate barriers to the provision of nonpharmacological approaches encountered in the busy ED environment, and provide nonpharmacological pain-management interventions in pediatric EDs.

The Effect of Curanderismo on Chronic Non-malignant Pain: A Case Report

This case study describes the effects of the use of curanderismo, an indigenous healing modality combining techniques in massage, sound, and aromatherapy, on a patient with chronic pain. Despite being a commonly used health practice in certain populations, little is reported in the medical literature about the use of curanderismo. Case report as part of a larger randomized trial of curanderismo for chronic pain. Setting was a community-based hospital affiliated primary care clinic. An adult patient with chronic, opioid dependent back pain following an injury, and subsequent spinal fusion was treated. Intervention was the patient received 33 curanderismo treatment sessions over 10 months in addition to ongoing conventional treatment at a community-based chronic pain management clinic. Main outcomes measures were self-reported assessments of pain, functional ability, mood, insomnia, and narcotic usage. Secondary outcome measure was qualitative interview. Although there was no change in quantitative self-reported pain measures, the patient reported improved function, mood, and sleep as well as decreased narcotic usage. Curanderismo, in addition to conventional pain management, improved patient reported symptoms and functional ability, led to healthy lifestyle changes, and decreased narcotic usage. Controlled studies are needed to confirm the benefit of curanderismo as safe, non-interventional, and cost-effective adjunct for chronic pain management.

Nonpharmacologic Pain Management Interventions in German Nursing Homes: A Cluster Randomized Trial

The reported prevalence of pain among nursing home residents (NHRs) is high. Insufficient use of analgesics, the conventional pain management strategy, is often reported. Whether and to what extent nonpharmacologic therapies (NPTs) are used to manage the pain of NHRs in Germany is largely unknown. The aim of this cluster-randomized trial was to assess the NPTs provided and to enhance the application and prescription of NPTs in NHRs on an individual level. There were six nursing homes in the intervention group and six in the control group. There were 239 NHRs, aged ≥65 years, with an average Mini-Mental State Examination score of at least 18 at baseline. Pain management interventions (cluster level) included an online course for physicians and 1-day seminar for nurses. Data on NPT applied by nurses and therapeutic NPT prescribed by physicians were obtained from residents' nursing documentation. Face-to-face interviews with NHRs assessed the NPT received. At baseline, 82.6% of NHR (mean age 83 years) were affected by pain, but less than 1 in 10 received NPT. The intervention did not result in a significant increase in the NPT applied by nurses, but did significantly increase the therapeutic NPT prescribed by physicians. Residents were active in using NPT to self-manage their pain. Given the prevalence of pain in NHRs, there is a clear need to improve pain management in this population. Extended use of NPT offers a promising approach. We recommend that nurses provide residents with education on pain-management techniques to support them in taking a proactive role in managing their pain.

Formulation optimization of a drug in adhesive transdermal analgesic patch

Context: Conventional pain management approaches have limitations such as gastrointestinal side effects, frequent dosing, and difficulties in swallowing medications. Hence, to overcome these limitations, we developed a transdermal analgesic patch.Objective: This study was designed to formulate a drug in adhesive transdermal patch with codeine (CDB) and acetaminophen (APAP) that may potentially treat moderate pain in children.Materials and methods: Three analgesic drugs hydrocodone bitartrate, CDB and APAP were screened by a slide crystallization study using polarized light microscope and their permeation profiles were studied using vertical Franz diffusion cells across porcine ear skin, dermatomed human skin and epidermis for 24 h, and the samples were quantified by high performance liquid chromatography. Patches used for permeation studies were prepared by dissolving sub-saturation concentration of the drug(s) in adhesive (with/without 5% w/w oleic acid [OA]), cast with a film casting knife.Results and discussion: Among the three drugs screened, CDB demonstrated the best permeation profile (660.21 µg/cm2), and shortest lag time (4.35 ± 0.01 h), and hence was chosen for patch studies. The highest concentration of CDB in the patch at which drug does not crystallize was determined as 40% of its saturation solubility (Cs) and that of APAP was determined as 200% of its Cs. CDB standalone patch delivered 105.48 µg/cm2 of CDB, while the CDB–APAP combination patch with 5% w/w OA delivered 151.40 µg/cm2 CDB and 58.12 µg/cm2 APAP in 24 h.Conclusion: Drug-in-adhesive patches using CDB and APAP were developed for infants and children. Addition of OA enhanced solubility and permeation of drugs.

Theoretical Considerations for Chronic Pain Rehabilitation.

Conventional rehabilitation of patients with chronic pain is often not successful and is frustrating for the treatment team. However, theoretical developments and substantial advances in our understanding of the neurological aspects of chronic pain are changing these experiences. Modern theoretical models of pain consider pain to be a perceptual inference that reflects a "best guess" that protective action is required. This article argues that keen observation and open and respectful clinician-patient and scientist-clinician relationships have been critical for the emergence of effective rehabilitation approaches and will be critical for further improvements. The role in modern pain rehabilitation of reconceptualizing the pain itself-by "Explaining Pain," careful and intentional observation of the person in pain, and the strategic and constant communication of safety-is emphasized. It also is suggested that better understanding of the neural mechanisms underpinning chronic pain has directly informed the development of new therapeutic approaches, which are being further refined and tested. Conventional pain treatment (where the clinician strives to find the pain-relieving medication or exercise) or pain management (where the clinician helps the patient to manage life despite unabating pain) is being replaced by pain rehabilitation, where a truly biopsychosocial approach allows clinicians to provide patients with the knowledge, understanding, and skills to reduce both their pain and disability. A brief overview is provided of the key aspects of modern pain rehabilitation and the considerations that should lead our interaction with patients with chronic pain.

Buprenorphine: revisiting the efficacy of transdermal delivery system.

Buprenorphine is a lipid-soluble pharmaceutic used in the management of chronic pain. It is a partial agonist at μ-opioid receptors, an antagonist at κ-opioid receptors, an agonist at δ-opioid receptors and a partial agonist at ORL-1 (nociceptin) receptors. An extensive literature search, including Google Scholar and Pubmed database, was conducted. Terms including and associated to 'efficacy of transdermal buprenorphine' were utilized to procure contemporary research articles in order to evaluate and compare the transdermal buprenorphine patch to commonly used traditional pain management medications. Transdermal buprenorphine has demonstrated better efficacy than conventional pain management pharmacotherapies. Side effects were similar to those associated with other opioids and included headache, dizziness, somnolence, constipation, dry mouth, nausea, vomiting, pruritus and erythema. Similar to transdermal delivery systems used with other medication, transdermal buprenorphine was associated with application-site pruritus and application-site reactions. Transdermal buprenorphine has significant potential for managing chronic pain. In addition to increased convenience and efficacy, advantages of transdermal buprenorphine include decreased tolerance and decreased withdrawal.

Randomized Study of Patient Controlled Epidural Analgesia (PCEA) Using Fentanyl and Bupivacaine versus Patient Controlled Analgesia (PCA) With Intravenous (IV) Morphine for Abdominal Surgery

Randomized Study of Patient Controlled Epidural Analgesia (PCEA) Using Fentanyl and Bupivacaine versus Patient Controlled Analgesia (PCA) With Intravenous (IV) Morphine for Abdominal Surgery Background: Effective pain relief helps in early mobilization leading to quick recovery and shorter hospital stay. Materials and Methods: Our aim was to compare, IV PCA and PCEA in terms of analgesic efficacy and side effects after major abdominal surgery. After ethics committee approval, written valid informed consent and sample size calculation, patients were randomly assigned into one of 2 groups of 40 each. Postoperatively, patients in Group A received IV morphine 1mg/ml and patients in Group B received epidural fentanyl 5mcg/ml and bupivacaine 0.125%. PCA pump was programmed to deliver 2ml bolus with a lockout interval of 10 minutes. No background infusion was used. Patients were assessed for pain, sedation, pulse rate, respiratory rate, blood pressure, oxygen saturation and side effects were looked for at 0, 2, 8, 12 and 24 hours. Rescue analgesia was given with IV Tramadol 2mg/kg when VAS > 4 at rest despite three consecutive PCA boluses. All calculations were done at 90% power and 5% significance using two sided tests. Results: No statistical difference was found in analgesia though quality of analgesia was better with PCEA. Requirement of rescue analgesia and incidence of nausea and vomiting was more with IV PCA though statistically insignificant. Conclusion: IVPCA using morphine and PCEA using bupivacaine and fentanyl are similar in efficacy. However, PCEA produced better quality of analgesia. Advantages of PCA over conventional pain management include individualization as patients are the best to assess their pain and can get medication as needed by pressing a button.

Transforaminal endoscopic lumbar decompression & foraminoplasty: a 10 year prospective survivability outcome study of the treatment of foraminal stenosis and failed back surgery.

BackgroundConventional diagnosis between axial and foraminal stenosis is suboptimal and long-term outcomes limited to posterior decompression. Aware state Transforaminal Endoscopic Lumbar Decompression and Foraminoplasty (TELDF) offers a direct aware state means of localizing and treating neuro-claudicant back pain, referred pain and weakness associated with stenosis failing to respond to conventional rehabilitation, pain management or surgery. This prospective survivability study examines the outcomes 10 years after TELDF in patients with foraminal stenosis arising from degeneration or failed back surgery.MethodsFor 10 years prospective data were collected on 114 consecutive patients with multilevel spondylosis and neuro-claudicant back pain, referred pain and weakness with or without failed back surgery whose symptoms had failed to respond to conventional rehabilitation and pain management and who underwent TELDF. The level responsible for the predominant presenting symptoms of foraminal stenosis, determined on clinical grounds, MRI and or CT scans, was confirmed by transforaminal probing and discography. Patients underwent TELDF at the spinal segment at which the predominant presenting symptoms were reproduced. Those that required treatment at an additional segment were excluded. Outcomes were assessed by postal questionnaire with failures being examined by the independent authors using the Visual Analogue Pain Scale (VAPS), the Oswestry Disability Index (ODI) and the Prolo Activity Score.ResultsCohort integrity was 69%. 79 patients were available for evaluation after removal of the deceased (12), untraceable (17) and decliners (6) from the cohort.VAP scores improved from a pre-operative mean of 7.3 to 2.4 at year 10. The ODI improved from a mean of 58.5 at baseline to 17.5 at year 10. 72% of reviewed patients fulfilled the definition of an “Excellent” or “Good Clinical Impact” at review using the Spinal Foundation Outcome Score. Based on the Prolo scale, 61 patients (77%) were able to return and continue in full or part-time work or retirement activity post-TELDF. Complications of TELDF were limited to transient nerve irritation, which affected 19% of the cohort for 2 – 4 weeks. TELDF was equally beneficial in those with failed back surgery.ConclusionsTELDF is a beneficial intervention for the long-term treatment of severely disabled patients with neuro-claudicant symptoms arising from spinal or foraminal stenosis with a dural diameter of more than 3mm, who have failed to respond to conventional rehabilitation or chronic pain management. It results in considerable improvements in symptoms and function sustained 10 years later despite co-morbidity, ageing or the presence of failed back surgery.Clinical RelevanceThe long term outcome of TELDF in severely disabled patients with neuro-claudicant symptoms arising from foraminal stenosis which had failed to respond to conventional rehabilitation, surgery or chronic pain management suggests that foraminal pathology is a major cause of lumbar axial and referred pain and that TELDF should be offered as primary treatment for these conditions even in the elderly and infirm. The application of TELDF at multiple levels may further widen the benefits of this technique.

Enhancing the Enhanced Recovery Program in Colorectal Surgery - Use of Extended-Release Epidural Morphine (DepoDur®).

PurposeDepoDur® is a single-dose extended-release morphine injection into the epidural space. It is not commonly used, but has many advantages over traditional analgesic regimens. We analyzed a number of these advantages in our case series in the context of the colorectal enhanced recovery program (ERP) and aimed to show that the ERP could be further enhanced by using DepoDur®.MethodsWe conducted a prospective audit of all patients undergoing open and laparoscopic colorectal procedures where DepoDur® was used between July 2010 and April 2012. Validated pain scores were used, and primary outcome measures were resting and dynamic pain, mobilization, and need for additional analgesia.ResultsTwo hundred eighty patients were included in the case series. Good pain control was seen at 24 and 48 hours. Eighty-one percent of the patients required simple analgesia alone at 24 hours, and 62% required simple analgesia (paracetamol +/- nonsteroidal anti-inflammatory drugs) alone at 48 hours. Only a minority required additional oramorph and patient-controlled analgesia at 24 and 48 hours (19% at 24 hours and 38% at 48 hours). Seventy-nine percent of the patients were mobilized at 24 hours, and 88% of the patients were mobilized at 48 hours.ConclusionDepoDur® is an effective alternative to conventional pain management techniques and may have a role in further enhancing the ERP.

Metabolomics uncovers dietary omega-3 fatty acid-derived metabolites implicated in anti-nociceptive responses after experimental spinal cord injury

Chronic neuropathic pain is a frequent comorbidity following spinal cord injury (SCI) and often fails to respond to conventional pain management strategies. Preventive administration of docosahexaenoic acid (DHA) or the consumption of a diet rich in omega-3 polyunsaturated fatty acids (O3PUFAs) confers potent prophylaxis against SCI and improves functional recovery. The present study examines whether this novel dietary strategy provides significant antinociceptive benefits in rats experiencing SCI-induced pain. Rats were fed control chow or chow enriched with O3PUFAs for 8weeks before being subjected to sham or cord contusion surgeries, continuing the same diets after surgery for another 8 more weeks. The paw sensitivity to noxious heat was quantified for at least 8weeks post-SCI using the Hargreaves test. We found that SCI rats consuming the preventive O3PUFA-enriched diet exhibited a significant reduction in thermal hyperalgesia compared to those consuming the normal diet. Functional neurometabolomic profiling revealed a distinctive deregulation in the metabolism of endocannabinoids (eCB) and related N-acyl ethanolamines (NAEs) at 8weeks post-SCI. We found that O3PUFAs consumption led to a robust accumulation of novel NAE precursors, including the glycerophospho-containing docosahexaenoyl ethanolamine (DHEA), docosapentaenoyl ethanolamine (DPEA), and eicosapentaenoyl ethanolamine (EPEA). The tissue levels of these metabolites were significantly correlated with the antihyperalgesic phenotype. In addition, rats consuming the O3PUFA-rich diet showed reduced sprouting of nociceptive fibers containing CGRP and dorsal horn neuron p38 mitogen-activated protein kinase (MAPK) expression, well-established biomarkers of pain. The spinal cord levels of inositols were positively correlated with thermal hyperalgesia, supporting their role as biomarkers of chronic neuropathic pain. Notably, the O3PUFA-rich dietary intervention reduced the levels of these metabolites. Collectively, these results demonstrate the prophylactic value of dietary O3PUFA against SCI-mediated chronic pain.