Displaying publications 1 - 20 of 77 in total

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  1. Singh SK, Yahya N, Misiran K, Masdar A, Nor NM, Yee LC
    Rev Bras Anestesiol, 2016 May-Jun;66(3):259-64.
    PMID: 26993410 DOI: 10.1016/j.bjan.2014.09.009
    Combined spinal-epidural (CSE) has become an increasingly popular alternative to traditional labour epidural due to its rapid onset and reliable analgesia provided. This was a prospective, convenient sampling study to determine the effects of CSE analgesia on labour outcome.
    Matched MeSH terms: Analgesia, Epidural
  2. Gopalsamy B, Chia JSM, Farouk AAO, Sulaiman MR, Perimal EK
    Molecules, 2020 Aug 26;25(17).
    PMID: 32858809 DOI: 10.3390/molecules25173880
    Zerumbone, a monocyclic sesquiterpene from the wild ginger plant Zingiber zerumbet (L.) Smith, attenuates allodynia and hyperalgesia. Currently, its mechanisms of action in neuropathic pain conditions remain unclear. This study examines the involvement of potassium channels and opioid receptors in zerumbone-induced analgesia in a chronic constriction injury (CCI) neuropathic pain mice model. Male Institute of Cancer Research (ICR) mice were subjected to CCI and behavioral responses were tested on day 14. Responses toward mechanical allodynia and thermal hyperalgesia were tested with von Frey's filament and Hargreaves' tests, respectively. Symptoms of neuropathic pain were significantly alleviated following treatment with zerumbone (10 mg/kg; intraperitoneal, i.p.). However, when the voltage-dependent K+ channel blocker tetraethylammonium (TEA, 4 mg/kg; i.p.), ATP-sensitive K+ channel blocker, glibenclamide (GLIB, 10 mg/kg; i.p.); small-conductance Ca2+-activated K+ channel inhibitor apamin (APA, 0.04 mg/kg; i.p.), or large-conductance Ca2+-activated K+ channel inhibitor charybdotoxin (CHAR, 0.02 mg/kg; i.p.) was administered prior to zerumbone (10 mg/kg; i.p.), the antiallodynic and antihyperalgesic effects of zerumbone were significantly reversed. Additionally, non-specific opioid receptors antagonist, naloxone (NAL, 10 mg/kg; i.p.), selective µ-, δ- and κ-opioid receptor antagonists; β-funaltrexamine (β-FN, 40 mg/kg; i.p.), naltrindole (20 mg/kg; s.c.), nor-binaltorphamine (10 mg/kg; s.c.) respectively attenuated the antiallodynic and antihyperalgesic effects of zerumbone. This outcome clearly demonstrates the participation of potassium channels and opioid receptors in the antineuropathic properties of zerumbone. As various clinically used neuropathic pain drugs also share this similar mechanism, this compound is, therefore, a highly potential substitute to these therapeutic options.
    Matched MeSH terms: Analgesia*
  3. Jin RR, Sutcliffe A, Vento M, Miles C, Travadi J, Kishore K, et al.
    Acta Paediatr, 2018 10;107(10):1733-1738.
    PMID: 29385272 DOI: 10.1111/apa.14242
    AIM: The diagnosis of tongue-tie (or ankyloglossia) has increased more than 10-fold in some countries. Whether this is a global phenomenon or related to cultural and professional differences is uncertain.

    METHODS: An online survey in English, Japanese, Chinese and Spanish was disseminated between May and November 2016 via 27 international professional bodies to >30 clinical professions chosen a priori to represent occupations involved in the management of neonatal ankyloglossia.

    RESULTS: A total of 1721 responses came from nursing (51%), medical (40%), dental (6%) and allied health (4%) clinicians. Nurses (40%) and allied health (34%) professionals were more likely than doctors (8%) to consider ankyloglossia as important for lactation problems, as were western (83%) compared to Asian (52%) clinicians. Referrals to clinicians for ankyloglossia management originated mainly from parents (38%). Interprofessional referrals were not clearly defined. Frenectomies were most likely to be performed by surgeons (65%) and dentists (35%), who were also less likely to be involved in lactation support. Clinicians performing frenectomies were more likely to consider analgesia as important compared to those not performing frenectomies.

    CONCLUSION: The diagnosis and treatment of ankyloglossia vary considerably around the world and between professions. Efforts to standardise management are required.

    Matched MeSH terms: Analgesia
  4. Aizatul Isla, A.L., Wan Rahiza, W.M., Azrin, M.A., Thohiroh, A.R., Nurlia, Y., Nadia, M.N.
    MyJurnal
    The tranversus abdominis plane (TAP) block for postoperative analgesia after caesarean section may confer potential benefits comparable to that of intrathecal opioids. We compared postoperative analgesia, and the incidence of nausea, vomiting, pruritus and sedation between the TAP block and intrathecal morphine (ITM) in patients undergoing Caesarean section. This was a prospective, randomised clinical study. Fifty American Society of Anaesthesiologists physical status I or II patients, planned for elective caesarean section under spinal anaesthesia, were randomly allocated to the TAP group (patients receiving spinal anaesthesia with bilateral TAP block without ITM) or ITM group (patients receiving spinal anaesthesia with ITM without a TAP block). Assessment for pain, postoperative nausea and vomiting, pruritus and sedation was done upon arrival and discharge from recovery, and at 6, 12 and 24 hours, postoperatively in the post natal ward. Results were analysed using analysis of variance (ANOVA). There was no pain at rest in either groups. Both groups experienced pain on movement at the 12th (p = 0.6) and 24th hour (p = 0.4). None of the patients in the TAP group experienced nausea, vomiting, pruritus or sedation. However, these incidences were found to be significantly higher in the ITM group. Ultrasound guided TAP block provided comparable postoperative analgesia to ITM without the side effects of the latter.
    Matched MeSH terms: Analgesia
  5. Nelbon Giloi, Liew, Constance Sat Lin, Payus, Alvin Oliver, Mac Guad, Rhanye, Murugaiah, Chandrika, Soe, May Zaw, et al.
    MyJurnal
    As general population of obese patients in Malaysia rapidly increases, more obese patients are requiring anaesthesia for various operative procedures. Obesity is associated with anatomical and physiological differences and co-morbidities that influence on the choices of anaesthesia care. A surgical case with general anaesthesia is used as a basis of discussion. A 37-year-old female, history of untreated hypertension and gastrooesophageal reflux disease (GORD), BMI of 41 admitted for laparoscopic cholecystectomy for symptomatic cholelithiasis under general anaesthesia. She presented with pain at the upper right abdomen and associated with bloated abdomen, nausea and vomiting after intake of meals. General anaesthesia and right ultrasound-guided transversus abdominis plane (TAP) block for abdominal wall blocks via subcostal approach was performed. Operation was removal gallstones in the common bile duct via laparoscopic approach. Post-operation patient was extubated successfully. She was prescribed paracetamol 1g 4 hourly and started on fentanyl patient-controlled analgesia (PCA) for next 2 days. In this case report, there is the description of the application of TAP block which when used in obese abdominal surgical procedure, can provide excellent postoperative pain relief, early mobilization and recovery.
    Matched MeSH terms: Analgesia, Patient-Controlled
  6. Chan YK, Ng KP, Chiu CL
    Int J Obstet Anesth, 2002 Jul;11(3):176-9.
    PMID: 15321544 DOI: 10.1054/ijoa.2002.0954
    Available data for obstetric care in the University Malaya Medical Centre, Kuala Lumpur from 1987 to 1999 were reviewed. Despite incomplete data, we were able to determine fairly well the practice of obstetric anaesthesia and analgesia in the unit, and the changes over the years. There was a decline in the use of general anaesthesia for both elective and emergency caesarean sections from 41.3% and 69.4% respectively in 1995 to 21.6% and 26.9% respectively in 1999. By 1999, regional anaesthesia had become the most common method of anaesthesia administered in both elective (14.3% epidural and 63.5% spinal) and emergency (30.2% epidural and 42.6% spinal) caesarean sections. The percentage of patients delivering vaginally who received epidural analgesia appeared to have stabilised at about 8 to 9% in the last few years, with a gradual decline in the total instrumental delivery rate from a high of about 12% to the pre-epidural rate of 7%.
    Matched MeSH terms: Analgesia*
  7. Kwan MK, Chiu CK, Chan TS, Chong KI, Mohamad SM, Hasan MS, et al.
    Spine (Phila Pa 1976), 2017 Jun 01;42(11):838-843.
    PMID: 28538525 DOI: 10.1097/BRS.0000000000001902
    STUDY DESIGN: A prospective cohort study.

    OBJECTIVE: The aim of this study was to determine and evaluate the trajectory of surgical wound pain from day 1 to day 14 after posterior spinal fusion (PSF) surgery in patients with adolescent idiopathic scoliosis (AIS).

    SUMMARY OF BACKGROUND DATA: Information regarding how the postoperative pain improves with time offers invaluable information not only to the patients and parents but also to assist the clinician in managing postoperative pain.

    METHODS: AIS patients who were planned for elective PSF surgery from September 2015 to December 2015 were prospectively recruited into this study. All patients underwent a similar pain management regimen with patient-controlled anesthesia (PCA) morphine, acetaminophen, celecoxib, and oxycodone hydrochloride.

    RESULTS: A total of 40 patients (36 F:4 M) were recruited. The visual analogue score (VAS) pain score was highest at 12 hours postoperation (6.0 ± 2.3). It reduced to 3.9 ± 2.2 (day 4), 1.9 ± 1.6 (day 7), and 0.7 ± 1.1 (day 14). The total PCA usage in all patients was 12.4 ± 9.9 mg (first 12 hours), 7.1 ± 8.0 mg (12 to 24 hours), 5.6 ± 6.9 (24-36 hours), and 2.1 ± 6.1 mg (36-48 hours). The celecoxib capsules usage was reducing from 215.0 ± 152.8 mg at 24 hours to 55.0 ± 90.4 mg on day 14. The acetaminophen usage was reducing from 2275 ± 1198 mg at 24 hours to 150 ± 483 mg at day 14. Oxycodone hydrochloride capsules consumption rose to the peak of 1.4 ± 2.8 mg on day 4 before gradually reducing to none by day 13.

    CONCLUSION: With an adequate postoperation pain regimen, significant pain should subside to a tolerable level by postoperative day 4 and negligible by postoperative day 7. Patient usually can be discharged on postoperative day 4 when the usage of PCA morphine was not required.

    LEVEL OF EVIDENCE: 2.

    Matched MeSH terms: Analgesia, Patient-Controlled
  8. Ahmad, K.I., Shamsul, A.S., Ismail, M.S.
    MyJurnal
    Acute appendicitis is one of the most common differential diagnoses for acute abdominal pain made by emergency doctors. Suspected cases require surgical referral for observation or definitive intervention to prevent complications. A high index of suspicion and good clinical skills with the aid of scoring systems allows early decision making, which includes optimal pain control. The objective of this study was to identify the pain score and is relationship to the cut-off points of the Alvarado scoring system so that justifies early surgical referral or discharge for suspected acute appendicitis from the Emergency Department of Universiti Kebangsaan Malaysia Medical Centre (UKMMC). This was a cross sectional study of acute abdominal pain from June 2007 to September 2008. All patients who fulfilled the criteria and consented to the study were assessed for Alvarado score, verbal numerical pain score (VNRS) and their subsequent management. Patients with an Alvarado score of ≥7 were likely to have acute appendicitis (80.1% sensitivity and 52.63% specificity) and those with the score of ≤3 were unlikely to have acute appendicitis. The median pain score was 7.00 (IQR: 5.00-8.50) but 72.5% did not receive any analgesia. There was no direct relationship between the pain score with Alvarado score. Oligoanalgesia in patients with acute appendicitis still exist in Emergency Department of UKMMC.
    Matched MeSH terms: Analgesia
  9. Chia P, Raman S, Tham SW
    J Obstet Gynaecol Res, 1998 Aug;24(4):267-73.
    PMID: 9798356
    To study the pregnancy outcome of women with acyanotic heart disease.
    Matched MeSH terms: Analgesia, Epidural
  10. Misiran KB, Yahaya LS
    Middle East J Anaesthesiol, 2013 Feb;22(1):59-64.
    PMID: 23833852
    This prospective randomized single-blinded study was conducted to determine whether there were differences in consumption, demand dosing and postoperative analgesia quality between PCEA using ropivacaine and levobupivacaine. Seventy patients with ASA classification I and II aged 18 to 80 years old scheduled for elective total knee replacement or total hip replacement were studied. All patients received CSE and then were randomly allocated to receive either ropivacaine 0.165% (Group A) or levobupivacaine 0.125% (Group B) both added with fentanyl 2.0 mcro g/ml via epidural route. PCEA regime was offered for 48 hours with additional standard orthopaedic practice of oral analgesia (etoricoxib 120 mg OD and paracetamol 1.0 gm QID) on the second postoperative day. Basal infusion of PCEA was at 3.0 ml/hour and discontinued after 24 hours following started of PCEA. The consumption of local anaesthetics used within the first 24 hours (basal + demand) and 48 hours (total basal + total demand) were recorded. The VAS pain score, sedation score, side effects and vital signs (blood pressure, heart rate and respiratory rate) were also recorded every four hours for 48 hours. This study showed that the total volume of drug used was significantly higher in Group A (163.31+/- 29.01 ml) than Group B (142.69 +/- 30.93ml) (p<0. 01). The mean dose of Group A for the first 48 hours after surgery was 251.43 +/- 70.02mg and was significantly greater than the mean dose of Group B (178.91 +/-42.33 mg) (p<0.01). The numbers of PCEA boluses delivered (D) and PCEA attempts (A) were higher in the Group A (22.37 +/-7.32 and 27.66 +/- 9.12) in contrast to Group B (17.63 +/- 7.71 and 24.40 +/- 11.51) but the differences were not statistically significant. The ratio D/A showed significantly higher in Group A (0.83 +/- 0.13) than Group B (0.74 +/- 0.15) (p<0. 02). The VAS pain score was similar for both groups. One patient in Group B had vomiting and there was no sedation, hypotension, pruritus or motor block recorded in both groups. In conclusion this study showed that both PCEA using ropivacaine 0.165% with fentanyl 2.0 micro g/ml and levobupivacaine 0.125% with fentanyl 2.0 micro g/ml provided effective postoperative analgesia within the first 48 hours of major lower limb orthopaedic surgery despite clinically significant dose difference. There was no hypotension, pruritus, sedation or motor block recorded in both groups.
    Matched MeSH terms: Analgesia, Epidural*; Analgesia, Patient-Controlled*
  11. Rahman NH, DeSilva T
    Eur J Emerg Med, 2012 Aug;19(4):241-5.
    PMID: 21968714 DOI: 10.1097/MEJ.0b013e32834bfc17
    Pain seems to be one of the most frequent complaints in the emergency department, however pain control is often suboptimal as seen by many audits. We conducted a study to find out whether the use of patient control analgesia (PCA) is effective in controlling acute pain in the emergency department
    Matched MeSH terms: Analgesia, Patient-Controlled*
  12. Ng KT, Yap JLL, Izham IN, Teoh WY, Kwok PE, Koh WJ
    Eur J Anaesthesiol, 2020 Mar;37(3):212-223.
    PMID: 31977626 DOI: 10.1097/EJA.0000000000001164
    BACKGROUND: Several studies suggest that systemic magnesium reduces postoperative opioid consumption and the intensity of pain, but others report conflicting results. The efficacy and safety profile of intravenous magnesium in noncardiac surgery remain uncertain.

    OBJECTIVES: The aim of this review was to investigate the effect of intravenous magnesium on the consumption of postoperative morphine in the first 24 h in adults undergoing noncardiac surgery.

    DESIGN: Systematic review and meta-analysis with trial sequential analysis.

    DATA SOURCES: MEDLINE, EMBASE, CENTRAL from their inception until January 2019.

    ELIGIBILITY CRITERIA: All randomised clinical trials comparing intravenous magnesium versus placebo in noncardiac surgery were systematically searched in the databases. Observational studies, case reports, case series and nonsystematic reviews were excluded.

    RESULTS: Fifty-one trials (n=3311) were included for quantitative meta-analysis. In comparison with placebo, postoperative morphine consumption at 24-h was significantly reduced in the magnesium group, with a mean difference [95% confidence interval (CI)] of -5.6 mg (-7.54 to -3.66, P analgesia request [143 (103 to 183) min, P analgesia may reduce morphine consumption in the first 24 h after surgery and delay the time to the first request for analgesia in patients undergoing noncardiac surgery. However, the included studies were of low-quality with substantial heterogeneity.

    TRIAL REGISTRATION: CRD42018086846.

    Matched MeSH terms: Analgesia*; Analgesics, Opioid/adverse effects
  13. Ahmad N, Tan CC, Balan S
    Med J Malaysia, 2007 Jun;62(2):122-6.
    PMID: 18705443 MyJurnal
    We sought to review the current practice of sedation and analgesia in intensive care units (ICUs) in Malaysian public hospitals. A questionnaire survey was designed and sent by mail to 40 public hospitals with ICU facility in Malaysia. The anaesthesiologists in charge of ICU were asked to complete the questionnaire. Thirty seven questionnaires were returned (92.5% response rate). Only 35% respondents routinely assess the degree of sedation. The Ramsay scale was used prevalently. A written protocol for sedation was available in only 14 centers (38%). Although 36 centers (95%) routinely adjust the degree of sedation according to patient's clinical progress, only 10 centers (14%) interrupt sedation on a daily basis. Most respondents agreed that the selection of agents for sedation depends on familiarity (97%), pharmacology (97%), the expected duration for sedation (92%), patient's clinical diagnosis (89%) and cost (73%). Midazolam (89%) and morphine (86%) were the most commonly used agents for sedation and analgesia, respectively. Only 14% respondents still frequently use neuromuscular blocking agents, mostly in head injury patients. Our survey showed similarity in the choice of sedative and analgesic agents in ICUs in Malaysian public hospitals comparable to international practice. Nevertheless, the standard of practice could still be improved by implementing the practice of sedation score assessment and daily interruption of sedative infusion as well as having a written protocol for sedation and analgesia.
    Matched MeSH terms: Analgesia/methods*
  14. Hassan WMNW, Nasir YM, Zaini RHM, Shukeri WFWM
    Malays J Med Sci, 2017 Oct;24(5):73-82.
    PMID: 29386974 MyJurnal DOI: 10.21315/mjms2017.24.5.8
    Background: The choice of anaesthetic techniques is important for the outcome of traumatic brain injury (TBI) emergency surgery. The objective of this study was to compare patient outcomes for target-controlled infusion (TCI) of propofol and sevoflurane anaesthesia.

    Methods: A total of 110 severe TBI patients, aged 18-60, who underwent emergency brain surgery were randomised into Group T (TCI) (n = 55) and Group S (sevoflurane) (n = 55). Anaesthesia was maintained in Group T with propofol target plasma concentration of 3-6 μg/mL and in Group S with minimum alveolar concentration (MAC) of sevoflurane 1.0-1.5. Both groups received TCI remifentanil 2-8 ng/mL for analgesia. After the surgery, patients were managed in the intensive care unit and were followed up until discharge for the outcome parameters.

    Results: Demographic characteristics were comparable in both groups. Differences in Glasgow Outcome Scale (GOS) score at discharge were not significant between Group T and Group S (P = 0.25): the percentages of mortality (GOS 1) [27.3% versus 16.4%], vegetative and severe disability (GOS 2-3) [29.1% versus 41.8%] and good outcome (GOS 4-5) [43.6% versus 41.8%] were comparable in both groups. There were no significant differences in other outcome parameters.

    Conclusion: TCI propofol and sevoflurane anaesthesia were comparable in the outcomes of TBI patients after emergency surgery.

    Matched MeSH terms: Analgesia
  15. Whittle ED
    Malaya Medical Journal, 1911;9:15-20.
    Matched MeSH terms: Analgesia
  16. Mohd Azizan, G., Karis, M., Noordin, Y.
    MyJurnal
    This randomised single-blinded study was conducted to evaluate if there was any difference between spinal anaesthesia with hyperbaric bupivacaine 0.5% and intrathecal morphine 0.2mg and combined-spinal epidural using hyperbaric bupivacaine 0.5% with epidural infusion of bupivacaine 0.1% plus fentanyl 2.0μg/ml for 24 hours, postoperative analgesia following hip and knee arthroplasty, in terms of pain score and side effects (nausea, vomiting, pruritus and respiratory depression). Eighty patients ASA I or ASA II, aged between 18 to 75 years who underwent knee and hip arthroplasty of approximately 3-4 hours, duration were recruited. They were randomly allocated to one of two groups by using computer generated randomised numbers. The pain score during the postoperative period was evaluated using Visual Analogue Score (VAS pain score) and the side effects were documented and treated accordingly. Results showed that patients in Group 1 and Group 2 were comparable in terms of age, gender, height, weight and race. There was no statistical difference in VAS pain score between the two groups at all times intervals. However, patients in Group 1 had a higher incidence of nausea and pruritus than patients in Group 2. None of the patients in either group, experienced respiratory depression. Thus, it was concluded that both intrathecal morphine 0.2mg and epidural infusion of bupivacaine 0.1% plus fentanyl 2.0μg/ml were comparable in providing postoperative analgesia up to 24 hours following hip and knee arthroplasty. Nevertheless, the use of spinal morphine led to a higher incidence of side effects namely nausea and pruritus.
    Matched MeSH terms: Analgesia, Epidural
  17. Chong HC, Fong KK, Hayati F
    Ann Med Surg (Lond), 2021 Apr;64:102267.
    PMID: 33889406 DOI: 10.1016/j.amsu.2021.102267
    Background: Extravasation injury (EVI) is common, yet it is always underestimated and underreported. Severity varies ranging from thrombophlebitis up to disability. Unrecognised EVI is a potential medicolegal case in medicine.

    Case presentation: We experience a 47-year-old lady who developed an unrecognised EVI after being admitted for sepsis. The EVI turned out to be a huge and sloughy skin ulcer. A series of wound debridement with vacuum dressing were conducted until the wound was able to be closed.

    Discussion: The EVI can be categorised according to Amjad EVI grading and Loth and Eversmann's EVI classification. Adult EVI tends to be overlooked, especially during critical care because patients cannot complain upon sedation and ventilation. In order to prevent EVI, firstly prevention is better than cure. Secondly, if EVI is recognised early, infusion should be stopped immediately. Thirdly, analgesia is mandatory. Finally, the plastic team needs to be engaged if it is deemed required.

    Conclusion: Prevention and early intervention before the occurrence of progressive tissue damage is the key to treatment. Early radical wound debridement and immediate or delayed wound coverage with skin graft or skin flap are indicated in full thickness skin necrosis, persistent pain, and chronic ulcer.

    Matched MeSH terms: Analgesia
  18. Sabran, M.N., Talha, A.J.M., Omar, M., Ibrahim, M.Y., Shahril, Y.
    Malays Orthop J, 2008;2(2):21-26.
    MyJurnal
    This is a prospective randomized clinical trial to compare use of a combination of periarticular drug injection with patientcontrolled analgesia (PCA) to PCA alone in post-total knee arthroplasty (TKA). Thirty patients who were admitted for unilateral total knee arthroplasty were selected randomly into an Injection group or a Standard group. The periarticular injection contained Ropivacaine, Ketorolac and Adrenaline, given intra-operatively. The mean amount of opioid used was 22.87 mmol/L in the Injection group as compared to 39.78 mmol/L in the Standard group (p = 0.026). The Injection group had lower pain score at rest and during exercise (p=0.021, p=0.041, respectively), as well as better return to function (p=0.026) and shorter hospital stay (6.1 days, Injection; 7.5 days, Standard, p=0.027). Overall, the group receiving periarticular drugs injection had less pain, less narcotic usage, earlier return to function, similar experience of adverse effects and shorter hospital stays.
    Matched MeSH terms: Analgesia
  19. Ng, V.H., Ahmad Khaldun, I., Siti Sarah, M.Z., Ida Zarina, Z.
    Medicine & Health, 2018;13(2):114-121.
    MyJurnal
    Pain is one of commonest presentations at Emergency Department (ED). Previous studies showed inadequate pain control in ED. However, few have addressed specific, practical methods of improving the timeliness and frequency of pain control in emergency setting. This study was a randomized controlled trial in a simulated environment of an actual functioning ED using a timer device to remind care personnel to assess pain and provide analgesia at set intervals versus a “standard therapy” group without visual/audio aids. The mean documentation performance scores between timer and control groups were 94.45% + 5.85 vs 72.22% + 17.57 (p
    Matched MeSH terms: Analgesia
  20. Ahmad AH, Ismail Z, Than M, Ahmad A
    Malays J Med Sci, 2008 Jan;15(1):13-22.
    PMID: 22589610 MyJurnal
    The potential of ketamine, an N-methyl D-aspartate (NMDA) receptor antagonist, in preventing central sensitization has led to numerous studies. Ketamine is increasingly used in the clinical setting to provide analgesia and prevent the development of central sensitization at subanaesthetic doses. However, few studies have looked into the potential of ketamine in combination with stress-induced analgesia. This study looks at the effects of swim stress, which is mediated by opioid receptor, on ketamine analgesia using formalin test. Morphine is used as the standard analgesic for comparison. Adult male Sprague-Dawley rats were assigned to 6 groups: 3 groups (stressed groups) were given saline 1ml/kg intraperitoneally (ip), morphine 10mg/kg ip or ketamine 5mg/kg ip and subjected to swim stress; 3 more groups (non-stressed groups) were given the same drugs without swim stress. Formalin test, which involved formalin injection as the pain stimulus and the pain score recorded over time, was performed on all rats ten minutes after cessation of swimming or 30 minutes after injection of drugs. Combination of swim stress and ketamine resulted in complete analgesia in the formalin test which was significantly different from ketamine alone (p<0.05) and saline with stress (p<0.01). There is no significant difference between ketamine stressed and morphine stressed. These results indicate that ketamine and swim stress act synergistically to produce profound analgesia in the formalin test. This suggests that in the clinical setting, under stressful situations such as operative stress, ketamine is capable of producing profound analgesia at a subanaesthetic dose.
    Matched MeSH terms: Analgesia
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