[Improving the effectiveness of local anesthesia in patients with arterial hypertension in the provision of emergency dental care]. / Povyshenie effektivnosti mestnogo obezbolivaniya u patsientov s arterial'noi gipertenziei pri okazanii neotlozhnoi stomatologicheskoi pomoshchi.

THE AIM OF THE STUDY: Was to evaluate the use of Ketorol Express as a preventive analgesia to increase the effectiveness of local anesthesia in providing emergency dental care to patients with arterial hypertension. MATERIALS AND METHODS: The study was conducted on the basis of the state autonomous healthcare institution of the Moscow region «Royal Dental Clinic¼ with the participation of 83 people. The patients were divided into two groups. In group 1, Ketorol Express was prescribed as a preventive analgesia in a dosage of 20 mg before local anesthesia. Patients of group 2 underwent dental interventions without the use of preventive analgesia. A 3% solution of mepivacaine was used as a local analgesic solution. For a subjective assessment of the effectiveness of anesthesia, use a visual analog scale. All patients had their blood pressure and heart rate measured before and after the interventions and hemodynamic parameters were continuously monitored during emergency dental care. RESULTS: In group 1, the effectiveness of combined anesthesia with the infiltration method of local anesthetic administration was 93±1.17%, according to the patient, 94±1.47%, according to the doctor, with the conductive method of anesthesia at the mandibular orifice - according to the patient it was 91±1.01%, according to the doctor 92± 1.36%. In group 2, when providing emergency dental care with the infiltration method of administration of 3% mepivacaine the anesthesia was effective in 80±1.97% of cases according to the patient and in 80±1.17% of cases according to the doctor, with the conductive method of anesthesia at the mandibular orifice, the effectiveness of anesthesia according to the patient was 82±1.11%, according to the doctor 85±1.23%. CONCLUSION: The results of the study demonstrated a statistically significant increase in the effectiveness of local anesthesia performed with a 3% solution of mepivacaine in patients with arterial hypertension due to the use of preventive analgesia with Ketorol Express at a dosage of 20 mg (2 tablets of 10 mg) in emergency dental care with registration and analysis of changes in hemodynamic parameters.

Actualización en analgesia preventiva y analgesia multimodal / Update on preventive analgesia and multimodal analgesia

Una deficiente calidad del manejo del dolor post operatorio agudo genera aumento en la morbilidad perioperatoria, disminuye la calidad de vida del paciente, aumenta los reingresos hospitalarios y, finalmente, los costes en salud. La analgesia preventiva y multimodal son dos estrategias que han sido implementadas para tratar de optimizar el manejo del dolor. Si bien en la primera, la evidencia es favorable a su empleo, aún no existe un total consenso en esto. A su vez, la analgesia multimodal, al emplear diferentes fármacos y/o técnicas, ha logrado evidenciar de mejor manera su utilidad y los beneficios al implementarla como terapia. En este artículo, revisamos la evidencia que certifica y avala el uso de éstas. Finalmente, a nuestro parecer, lo más importante en el quehacer del clínico, es lograr individualizar la estrategia que usaremos en el manejo del dolor postoperatorio, adaptándonos a las necesidades y el contexto propio de cada uno de nuestros pacientes.

A poor quality of acute postoperative pain management generates an increase in perioperative morbidity, decreases the quality of life of the patient, increases hospital readmissions and finally, increases health costs. Preventive and multimodal analgesia are two strategies that are implemented to try to optimize pain management. Although in the first, the evidence is favorable to its use, there is still no total consensus. At the same time, multimodal analgesia, by using different drugs and/or techniques, has demonstrated, in a better way, its usefulness and benefits when implemented as a therapy. In this article, we review the evidence that certifies and supports the use of these techniques. Finally, in our opinion, the most important thing in the clinician's task is to be able to individualize the strategy that we will use in postoperative pain management, adapting to the needs and context of each one of our patients.

Does preventive single dose of intravenous dexketoprofen reduce pain and swelling after orthognathic surgery? A prospective, randomized, double blind clinical trial

Background: The purpose of this study was to evaluate the effect of a single-dose intravenous dexketoprofen administration for preventive analgesia on postoperative pain and reducing swelling in double jaw surgery. Material and methods: The authors designed a prospective, randomized, and double-blind cohort study. Patients who have Class III malocclusion were randomly divided in two groups. 50 mg intravenous dexketoprofen trometamol were administrated 30 minutes before incision in treatment group, while intravenous sterile saline was administrated 30 minutes before incision in placebo group. The primary predictor variable was treatment group. Primary outcomes were pain, swelling and 24-hour opioid intake. Patient- controlled analgesia with tramadol was given for management of postoperative pain. Other variables were demographic and operation related parameters. Visual analogue scale was used to evaluate postoperative pain. 3dMD Face System (3dMD, USA) was used to measure postoperative swelling. Data were analysed using two independent samples t test and Mann Whitney U test. Results: The study sample was composed of 30 patients with a mean age of 20,63 years and 21 were female. Preemptive dexketoprofen administration decreased postoperative tramadol consumption by 25.9% compared to placebo group, and there was a statistically significant decrease in VAS scores (p<0,05). There was no statistically significant difference between the groups in terms of swelling (p>0,05). Conclusions: Preventive administration of intravenous dexketoprofen provides adequate analgesic effect in the postoperative 24-hour period and reduces opioid consumption in orthognathic surgery. (AU)

Management of perioperative pain after TKA.

Postoperative pain is the prime obstacle to recovery of motion and return to activity after total knee arthroplasty (TKA). Combating pain is a key point in enhanced recovery after surgery (ERAS) protocols. Outcome depends on the efficacy of pain relief, making it a major issue. The pain originates locally in the knee and also remotely via neural pathways. Regression can be slow, over several months. Pain may sometimes be definitive, to a varying degree. Pain should be managed at each step of ERAS, from the preoperative period to the last follow-up consultation, and most especially during the perioperative phase. Pain needs to be anticipated and limited for as long as necessary. The impact of analgesics should be enhanced by means of potentiators. Some are administered by general route, sometimes preoperatively; others are applied locally, directly in the surgical site by local injection, or close to the nerves, to reduce painful stimuli. The two main principles of pain management are preventive analgesia and multimodal analgesia associating various molecules and routes.

The effect of preoperative application of butorphanol tartrate on the quality of recovery in patients undergoing thoracoscopic lobectomy / 中国医师杂志

Objective:To observe the effect of preoperative application of butorphanol tartrate on postoperative recovery quality in patients undergoing thoracoscopic lobectomy.Methods:A prospective selection was conducted on 96 lung cancer patients who underwent thoracoscopic lobectomy and were admitted to Linyi People′s Hospital from May 2021 to September 2021. They were randomly divided into observation group and control group using a random table number method, with 48 patients in each group. The observation group received intravenous injection of 0.02 mg/kg butorphanol tartrate 15 minutes before anesthesia induction; The control group was given an equal volume of physiological saline. The operation site, operation time, remifentanil dosage during operation, heart rate (HR) and mean arterial pressure (MAP) at each time point of admission (T 0), intubation (T 1), 5 min after intubation (T 2), extubation (T 3), 5 min after extubation (T 4), and 15 min into post-anaesthesia care unit (PACU) (T 5) were recorded; The awakening Restlessness score (RS), Ramsay score, Visual Analogue Scale (VAS) score at T 4 and T 5, the time required from completion to extubation, and postoperative anesthesia related adverse reactions were evaluated. Results:There was no significant difference in the operation site, operation time and remifentanil dosage between the two groups (all P>0.05). Compared with T 0, the HR at T 2, T 3 and T 4, MAP at T 1, T 2, T 3 and T 4 in the two groups decreased significantly (all P<0.05). The HR of the observation group at T 1 and T 3 was significantly lower than that of the control group, and the difference was statistically significant (all P<0.05). The VAS scores of T 4 and T 5 in the observation group were lower than those in the control group after surgery, while the Ramsay score were higher than those in the control group (all P<0.001). The incidence of postoperative restlessness, nausea and vomiting in the observation group was lower than that in the control group ( P<0.05). Conclusions:Administering 0.02 mg/kg butorphanol tartrate 15 minutes before anesthesia induction can improve the quality of recovery in patients undergoing thoracoscopic lobectomy, reduce restlessness and related adverse reactions during recovery.

Multimodal Analgesia.

Perioperative pain management is one of the domains in which Anesthesiologists are intricately involved, and which is immensely important. Adequate postoperative analgesia is central to avoid both the acute as well as chronic complications of uncontrolled postoperative pain. Preventive analgesia has been identified as an approach to mitigate the phenomenon of central sensitization, which plays an important role in the development of chronic pain after surgery. As an over-reliance on opioids for peri- and postoperative pain control is associated with opioid dependence and hyperalgesia, multimodal analgesia has taken center stage. Multimodal analgesia, in theory, will optimize perioperative pain control, reduce the chance of central sensitization, and avoid the detrimental effects of opioid overuse. Multiple classes of systemic analgesic medications have been used to accomplish these tasks, and the aim of this article is to outline these medications, their mechanisms of action, as well as the evidence behind their individual roles in multimodal analgesia. Regional anesthesia has also been embraced as a key component of multimodal analgesia in orthopedic surgery; however, over the past several years, local infiltration analgesia (LIA) emerged as a viable alternative, particularly in total knee arthroplasty.

A Dose-Response Relationship Study of Prophylactic Nalbuphine to Reduce Pain During the Awakening Period in Patients Undergoing Laparoscopic Total Hysterectomy: A Randomized, Controlled, Double-Blind Clinical Study.

Purpose: Prophylactic intravenous nalbuphine was administered to observe its median effective dose (ED50) in reducing pain after undergoing laparoscopic total hysterectomy. To investigate the effect of different doses of nalbuphine on postoperative analgesia and adverse reactions in patients. Patients and Methods: The 120 patients undergoing laparoscopic total hysterectomy were divided into 6 groups: group C (control) and group P (5 different doses of nalbuphine) with 20 patients per group. The doses of nalbuphine in group P were in an equally proportional series (groups P1, P2, P3, P4, and P5 received doses of 0.280, 0.200, 0.140, 0.100, and 0.070 mg/kg, respectively), diluted to 20 mL with saline and administered 5 min before the induction of anesthesia. A similar volume (20 mL) of saline was administered to group C 5 min before the induction of anesthesia. The numeric rating scale (NRS) of patients during awakening and after surgery, the number of postoperative salvage analgesia, and the occurrence of postoperative adverse effects were recorded. Results: The ED50 (95% confidence interval (CI)) of nalbuphine in preventing pain during the awakening period in patients calculated using the point-slope method was 0.125 (0.108, 0.145) mg/kg. NRS scores differed among the 6 groups at 30 min and 1 h after extubation (P < 0.001; P < 0.001). Pairwise comparisons between groups revealed that, at 30 min after extubation, compared with group P1, the NRS scores of groups P4, P5, and C were higher (P = 0.001, P < 0.001, P < 0.001); compared with group P2, groups P5 and C had higher NRS scores (P = 0.011, P = 0.001). At 1 h after extubation, the NRS scores of groups P1 and P2 were lower than that of group P4 (P = 0.046, P = 0.036). Compared with the control, only the group P1 had a lower cough score (P = 0.009) and there were no differences in the other groups. There were no differences in sedation score at 10 min after extubation, the incidence of adverse events at 24 h postoperatively, or the number of remedial analgesics at 24 h postoperatively (P > 0.05). Conclusion: The ED50 (95% CI) of nalbuphine as a prophylactic in reducing pain during recovery was 0.125 (0.108, 0.145) mg/kg. Compared with the control, nalbuphine at doses of 0.140, 0.200, and 0.280 mg/kg prevented pain during the awakening period. Among these doses, 0.280 mg/kg was determined to be the best, the occurrence of cough was less during extubation and the postoperative analgesic effect was good. However, it is necessary to pay attention to the occurrence of adverse reactions.

[Preventive analgesia for the improvement of local anesthesia efficacy in treatment of acute pulpitis in molars]. / Ispol'zovanie preventivnoi anal'gezii dlya povysheniya effektivnosti mestnogo obezbolivaniya pri lechenii ostrykh pul'pitov molyarov.

THE AIM OF THE STUDY: Was the assessment of the efficacy of using non-steroidal anti-inflammatory drug Ketorol Express as a preventive analgesia in the treatment of acute pulpitis in molars. MATERIALS AND METHODS: The study comprised 128 individuals, 76 (59.4%) women and 52 (40.6%) men. The mean age was 37.4 years. Two different visual-analog scales were used to evaluate the effectiveness of pain relief and the general well-being of the patient and the doctor. THE RESULTS: Of the study proved that the preventive analgesia with Ketorol Express at a dosage of 20 mg 15 minutes before local anesthesia with 4% articaine with epinephrine 1:200 000 in patients diagnosed with acute pulpitis of molars was effective since local anesthesia high effectiveness, absence of necessity for alternate anesthesia were registered by patients, which coincided with the dentist's opinion. CONCLUSION: Preventive analgesia with Ketorol Express improves the efficacy of local anesthesia in the treatment of acute pulpitis in molars.

Analgesia preventiva versus analgesia postoperatoria con paracetamol + ketorolaco en colecistectomía laparoscópica / Preventive versus postoperative analgesia with paracetamol + ketorolac in laparoscopic cholecystectomy

Resumen: Introducción: La analgesia preventiva es la administración de un fármaco o realización de una intervención capaz de inhibir o bloquear la respuesta dolorosa con la finalidad de prevenir el dolor asociado a un procedimiento quirúrgico. Objetivo: Identificar si existen diferencias en el control del dolor postoperatorio utilizando analgesia preventiva versus analgesia postoperatoria, manejado con paracetamol + ketorolaco en pacientes sometidos a colecistectomía laparoscópica electiva. Material y métodos: Ensayo clínico controlado, comparativo, aleatorizado, longitudinal, unicéntrico, prospectivo, homodémico, doble ciego; con 70 pacientes divididos en dos grupos. En el grupo 1 que recibió analgesia preventiva se usó paracetamol + ketorolaco y en el grupo 2 se utilizó el mismo esquema de manera postquirúrgica inmediata. Se midió tensión arterial, frecuencia cardíaca, escala verbal numérica del dolor y presencia de efectos secundarios de los fármacos en distintos momentos. Prueba estadística T de Student con significancia estadística de p < 0.05. Resultados: A los 60 minutos la tensión arterial diastólica en el grupo 1 tuvo diferencia de medias -4.20 con p = 0.027 y la escala verbal numérica presentó diferencia de medias de -0.71 y p = 0.002. A las cuatro horas la tensión arterial diastólica mostró diferencia de medias de -3.5 y p = 0.033. Las náuseas se constataron en 2.9% para el grupo 1 y 8.6% para el grupo 2. Conclusiones: Existe una mejor respuesta al dolor en aquellos pacientes que reciben un esquema de analgesia preventiva en comparación a los que se les administra un esquema de analgesia postquirúrgica inmediata.

Abstract: Introduction: Preventive analgesia is the administration of a drug or performance of an intervention capable of inhibiting or blocking the painful response in order to prevent the pain associated with a surgical procedure. Objective: To identify whether there are differences in postoperative pain control using preventive analgesia versus postoperative analgesia, managed with paracetamol + ketorolac in patients undergoing elective laparoscopic cholecystectomy. Material and methods: Controlled clinical trial, randomized, longitudinal, unicentric, prolective, homodemic, double blind; 70 patients divided into two groups. group 1 received preventive analgesia using paracetamol + ketorolac and group 2 same scheme in an immediate postsurgical manner. Bloodpressure, heartrate, numerical verbal scale of pain and presence of side effects of drugs at different times were measured. Student's t-test with statistical significance of p < 0.05. Results: At 60 minutes the diastolic blood pressure in group 1 had difference of means -4.20 with p = 0.027 and numerical verbal scale presented difference of means of -0.71 and p = 0.002. At four hours diastolic bloodpressure showed difference of means of -3.5 and p = 0.033. Nausea was reported in 2.9% for group 1 and 8.6% for group 2. Conclusions: There is a better response to pain in those patients who receive a preventive analgesia scheme compared to those who are administered an immediate post-surgical analgesia scheme.

Persistent Post-Mastectomy Pain: The Impact of Regional Anesthesia Among Patients with High vs Low Baseline Catastrophizing.

BACKGROUND: Persistent post-mastectomy pain (PPMP) varies both in its severity and impact, with psychosocial factors such as catastrophizing conferring greater risk. Preoperative regional anesthesia (RA) is an important nonopioid therapy, but with variable success at preventing PPMP in previous reports. We previously reported that RA was associated with lower acute post-mastectomy pain and opioid use, but more prominently among patients with higher baseline catastrophizing. The current longitudinal investigation at 3, 6, and 12 months postop aimed to detect differential long-term impact of RA on PPMP among patients with high vs low catastrophizing. METHODS: In this prospective observational study, patients (n = 123) completed preoperative psychosocial assessment and underwent mastectomy either with (n = 56) or without (n = 67) preoperative RA. Generalized estimating equation (GEE) regression analysis assessed impact of baseline catastrophizing, RA, and their interaction, on the primary outcome of pain severity index, as well as secondary outcomes including cognitive and emotional impact of pain, and persistent opioid use. RESULTS: We observed a significant interaction between the effect of catastrophizing and RA on PPMP. Specifically, RA was associated with reduced pain severity and pain impact 3, 6, and 12 months postoperatively, but only among those with high baseline catastrophizing scores. In addition, both RA and lower catastrophizing scores were associated with lower incidence of persistent opioid use. CONCLUSIONS: The efficacy of therapies to prevent PPMP may be importantly influenced by pain-modulatory psychosocial characteristics. These findings underscore the importance of considering individual patient factors when applying preventive treatments, and of including their assessment in future trials.

Perioperative use of physostigmine to reduce opioid consumption and peri-incisional hyperalgesia: a randomised controlled trial.

BACKGROUND: Several studies have shown that cholinergic mechanisms play a pivotal role in the anti-nociceptive system by acting synergistically with morphine and reducing postoperative opioid consumption. In addition, the anti-cholinesterase drug physostigmine that increases synaptic acetylcholine concentrations has anti-inflammatory effects. METHODS: In this randomised placebo-controlled trial including 110 patients undergoing nephrectomy, we evaluated the effects of intraoperative physostigmine 0.5 mg h-1 i.v. for 24 h on opioid consumption, hyperalgesia, pain scores, and satisfaction with pain control. RESULTS: Physostigmine infusion did not affect opioid consumption compared with placebo. However, the mechanical pain threshold was significantly higher (2.3 [sd 0.3]) vs 2.2 [0.4]; P=0.0491), and the distance from the suture line of hyperalgesia (5.9 [3.3] vs 8.5 [4.6]; P=0.006), wind-up ratios (2.2 [1.5] vs 3.1 [1.5]; P=0.0389), and minimum and maximum postoperative pain scores at 24 h (minimum 1.8 [1.0] vs 2.4 [1.2]; P=0.0451; and maximum 3.2 [1.4] vs 4.2 [1.4]; P=0.0081) and 48 h (minimum 0.9 [1.0] vs 1.6 [1.1]; P=0.0101; and maximum 2.0 [1.5] vs 3.2 [1.6]; P=0.0029) were lower in the study group. Pain Disability Index was lower and satisfaction with pain control was higher after 3 months in the physostigmine group. CONCLUSIONS: In contrast to previous trials, physostigmine did not reduce opioid consumption. As pain thresholds were higher and hyperalgesia and wind-up lower in the physostigmine group, we conclude that physostigmine has anti-hyperalgesic effects and attenuates sensitisation processes. Intraoperative physostigmine may be a useful and safe addition to conventional postoperative pain control. CLINICAL TRIAL REGISTRATION: EudraCT number 2012-000130-19.

Pre-clinical evaluation of new dibucaine formulations for preventive analgesia.

We have previously developed ammonium sulphate gradient loaded liposomes to encapsulate dibucaine. Thus, the purpose of this study was to evaluate the pre-clinical safety and effectiveness of this novel ionic liposomal formulation of dibucaine (DBC), as described in previous work. Effectiveness was evaluated in vivo on Wistar rats (n = 8) that received plain DBC or liposomal DBC (DBCLUV). Control empty liposomes (without DBC) or saline were also used as control. Sciatic nerve block was performed using the formulations or controls (0.4 mL). A hindpaw incision-based postoperative pain model was used to evaluate mechanical hypersensitivity with von Frey filaments. To verify antiinflamatory activity protein levels of TNF-α, IL-1ß, substance P and CGRP were measured by ELISA in the hindpaw tissue after 1 and 6 hours of the incision. To corroborate drug safety, sciatic nerve Schwann cell cultures were treated with the aforementioned formulations and assessed for cell viability (MTT assay) and death (flow cytometry assay). Histopathology of the tissues surrounding the sciatic nerve region was also assessed 2 and 7 days after treatment. All animals presented post incisional hypersensitivity and DBCLUV showed longer analgesic effect (p < 0.001). DBCLUV reduced TNF-α and CGRP levels (p < 0.05). Histopathological evaluation showed greater inflammatory reaction after the administration of control liposomes when compared to DBC (p < 0.05). There was no difference in Schwann cell viability and death between plain and encapsulated DBC. DBCLUV was safe and enhanced anaesthesia duration due to slow release of dibucaine from ammonium sulphate gradient loaded liposomes.

Preoperative Administration of Extended-Release Dinalbuphine Sebacate Compares with Morphine for Post-Laparoscopic Cholecystectomy Pain Management: A Randomized Study.

PURPOSE: Perioperative pain management plays a critical role in the effort to promote enhanced recovery after surgery (ERAS). Pain is also the most concern for patients after laparoscopic cholecystectomy (LC). Naldebain (extended-release dinalbuphine sebacate, DS) is an oil-based formulation for intramuscular injection that has been designed for extended release and can be used for preoperative analgesia over a 7-day period. This study was aimed to compare the efficacy of DS injection with that of regular postoperative morphine administered when necessary for the management of post-laparoscopic cholecystectomy pain. PATIENTS AND METHODS: Forty-four patients scheduled for elective laparoscopic cholecystectomy were included in this prospective study. The patients were allocated randomly into two groups, with equal numbers receiving preoperative DS versus post-operative morphine. A total of 21 and 22 patients completed the study within the preoperative DS and post-operative morphine group, respectively. RESULTS: There were no statistically significant differences between two treatment groups with respect to length of surgery, anesthetics used during operation, or the average visual analog scale pain score in the post-operative anesthesia care unit (PACU), and at 4, 24, 48, and 72 hours post-procedure. Morphine was required only during the first postoperative day among those in the DS group. Safety was comparable in both DS and morphine groups. CONCLUSION: A single preoperative dose of DS provides sufficient analgesia along with a manageable safety profile and no interference with surgical anesthetics when compared to control cases that underwent surgery without preoperative DS treatment. This pilot study suggests that preoperative administration of DS is safe and may decrease the need for postoperative opioid use after laparoscopic cholecystectomy. REGISTRATION: ClinicalTrials.gov Identifier: NCT03713216.

[Perioperative measures for prevention of phantom pain: an evidence-based approach to risk reduction]. / Perioperative Maßnahmen zur Prävention von Phantomschmerz: ein evidenzbasierter Ansatz zur Risikoreduktion.

Prevention of phantom limb pain is one of the biggest and still largely unsolved challenges in perioperative medicine. Despite many study efforts and optimization of postoperative pain treatment over the last 30 years, a significant reduction in the incidence of phantom limb pain has not been achieved. Current studies have also shown that at least 50% of patients develop phantom pain after 6 months. A possible approach could be to combine multiple synergistic interventions and implement them as a perioperative phantom pain management strategy bundle. In addition to regional anesthesia, NMDA antagonists, gabapentinoids, antidepressants and systemic lidocaine could play a relevant role. The aim of this pharmacological intervention was the modification of the pathophysiological changes in peripheral nerves and in the central nervous system after amputation.

[Is postoperative acute pain control in colorectal surgery better within an enhanced recovery after surgery program (ERAS)?] / ¿Mejora el control del dolor postoperatorio en cirugía colorrectal tras la implementación de un protocolo de rehabilitación intensificada (ERAS)?

BACKGROUND AND OBJECTIVE: A good acute pain control is necessary to achieve the main objective of Enhanced recovery After Surgery (ERAS) programs and accelerate recovery. The study objective is to evaluate postoperative (PO) acute pain, PO opioid consumption, and its association with functional recovery, after implementing a colorectal surgery ERAS program. An analysis was made as regards drugs adverse effects. METHODS: Observational cohort study on scheduled colorectal Surgery: one prospective cohort subjected to the ERAS care program, and one retrospective cohort that received traditional non-standardised care. A record was made of mean pain intensity (measured by a visual analogue scale, which classifies pain intensity from 0 to 10, from lower to higher intensity), as well as the amount of opioid consumption on the day of surgery and on the first three postoperative days, and drugs adverse effects. An analysis was made of the association between PO opioid consumption and ERAS program, and between PO opioid consumption and functional recovery. RESULTS: The study included a total of 410 patients (313 in the ERAS group and 97 in the control group). In the ERAS group, it was observed that the mean visual analogue scale was less than 2, with a smaller amount of PO opioid consumption, on each single day and the accumulated amount of the four days (4 [0-24] vs. 0 [0-4], P<.001). PO opioid consumption was associated with functional recovery (OR 0.97 [95% CI; 0.96-0.99], P=.011). No drugs adverse effects were observed. CONCLUSIONS: After implementing a colorectal Surgery ERAS program, good pain control was achieved, as well as a reduction in PO opioid consumption, which is associated with functional recovery. No drugs adverse effects were observed.

Analgesia preventiva con microdosis de ketamina en pacientes operados con anestesia general / Preemtive analgesia with micro doses of ketamine in patients under general anesthesia

INTRODUCTION: Acute postoperative pain is a complex physiological reaction to tissue injury or disease. Ketamine, an NMDA receptor antagonist, is the only intravenous anesthetic with hypnotic, analgesic and amnesic properties. OBJECTIVE: To evaluate the effectiveness of the administration of ketamine microdosis in patients operated with general anesthesia. METHODS: A prospective, quasi-experimental, controlled, double-blind study was conducted in patients operated under general anesthesia by the General Surgery service at the University Carlos Carlos de Céspedes University Hospital in Bayamo, in the period from January 2016 to December 2018. RESULTS: Age was homogeneous in both groups. The female sex prevailed in both groups without significant differences. There is a similarity in the mean ENV scores in the study group throughout the entire follow-up, never reaching 2 points. On the contrary, the patients in the control group, obtained throughout the follow-up an average score around 3 points. A lower opioid demand is observed in the group to which the ketamine microdose was administered. Hemodynamic parameters (heart rate, systolic and diastolic blood pressure) remained stable throughout the study period without statistically significant differences between the two. CONCLUSIONS: The administration of ketamine microdosis, as preventive analgesia in patients operated with general anesthesia, has proven effective in the control of acute postoperative pain.

INTRODUCCIÓN: El dolor postoperatorio agudo es una reacción fisiológica compleja a la lesión tisular o enfermedad. La ketamina, antagonista del receptor NMDA, es el único anestésico intravenoso con propiedades hipnóticas, analgésicas y amnésicas. OBJETIVO: Evaluar la efectividad de la administración de microdosis de ketamina en pacientes operados con anestesia general. MÉTODOS: Se realizó un estudio prospectivo, cuasi experimental, controlado, doble ciego en pacientes operados con anestesia general por el Servicio de Cirugía General en el Hospital Provincial Universitario "Carlos Manuel de Céspedes" de Bayamo, en el período comprendido desde enero de 2016 hasta diciembre de 2018. RESULTADOS: La edad fue homogénea en ambos grupos. El sexo femenino predominó en ambos grupos sin diferencias significativas. Hay una similitud en las puntuaciones medias de la ENV en el grupo estudio a lo largo de todo el seguimiento, nunca llegando a los 2 puntos. Por el contrario, los pacientes del grupo control, obtuvieron a lo largo de todo el seguimiento una puntuación media en torno a los 3 puntos. Se observa una demanda de opioide inferior en el grupo al que se le administró la microdosis de ketamina. Los parámetros hemodinámicos (frecuencia cardíaca, presión arterial sistólica y diastólica) permanecieron estables durante todo el periodo de estudio sin diferencias estadísticamente significativas entre ambos. CONCLUSIONES: La administración de microdosis de ketamina, como analgesia preventiva en pacientes operados con anestesia general, ha demostrado ser efectiva en el control del dolor agudo postoperatorio.

Effect of Perioperative Pregabalin on Incidence of Chronic Postmastectomy Pain Syndrome: A Prospective Randomized Placebo-Controlled Pilot Study.

BACKGROUND: Breast cancer is the most common malignancy among women. Chronic pain after breast surgeries is a well-known entity and is mainly neuropathic in nature. The primary aim of this study was to assess the effect of pregabalin given as preventive analgesic on the incidence of chronic postmastectomy pain. METHODS: A randomized control trial (RCT) was performed on 80 patients. Patients were allocated into two groups. Group 1 received pregabalin (Lyrica, Pfizer) 75 mg. BD starting from the morning of surgery and continued for 1 week. Group 2 received placebo capsules at identical time intervals. Patients were followed up for 3 months postoperatively. Incidence, severity, and location of chronic pain were recorded. The primary objective was to evaluate the effect of perioperative oral pregabalin on the incidence of chronic postmastectomy pain (at 3 months postoperatively). RESULTS: Of the 80 patients enrolled, 71 patients completed the study and were assessed for final outcomes. Incidence of chronic pain was comparable in both groups, with 16 out of 35 patients in Group 1 (44.7%) and 20 out of 36 patients in Group 2 (55.6%) reported chronic pain (P = 0.407). There was no difference between the severity of chronic pain (numeric rating scale ≥ 4) in both groups (P = 0.307). Incidence of adverse effects was comparable in both groups. CONCLUSION: This RCT shows that perioperative pregabalin may not have a role in the prevention of chronic pain after breast surgeries.

Preventive analgesia with pregabalin in laparoscopic cholecystectomy post-operated patients.

BACKGROUND: Preventive analgesia is the administration of an analgesic drug with the aim of attenuating post-operative pain, hyperalgesia and allodynia. Its use is justified in order to offer analgesia and reduce anxiety in patients undergoing laparoscopic procedures. OBJECTIVE: To evaluate if pregabalin in a dose of 1 mg/kg of weight is effective as preventive analgesia in post-operated laparoscopic cholecystectomy patients. METHODS: A single-blind controlled clinical trial was conducted, which included 60 patients scheduled for laparoscopic cholecystectomy randomly divided into 2 groups, where Group 1 received placebo and Group 2 received pregabalin a daily dose 72 h prior to surgical intervention. The intensity of pain was assessed using the numeric analog scale at 1, 2, 6, 12 and 24 post-operative h, as well as the level of presurgical anxiety with the Hamilton scale. RESULTS: Pain reduction was demonstrated in patients in the pregabalin group from the 1st h (p = 0.002), later the decrease in pain was more noticeable compared to patients who were given placebo (p < 0.001), the same happened with the anxiety level evaluated with the Hamilton scale (p < 0.005). CONCLUSION: The use of pregabalin as preventive analgesia turns out to be effective in the post-operative period and the pre-operative anxiety with minimal adverse effects in the post-operated patients of laparoscopic cholecystectomy.

Analgesia preventiva en el dolor postoperatorio / Preventive analgesia in postoperative pain

Resumen: El término de analgesia preventiva no es un concepto nuevo, dado que fue descrito por primera vez en 1988. El concepto (al que podríamos llamar «tratamiento antinociceptivo¼) sostiene que el alivio del dolor antes de la cirugía puede mejorar el manejo del dolor agudo postoperatorio, mediante la planificación de una analgesia pretransoperatoria, y tiene como objetivo prevenir la sensibilización del sistema nervioso central; por lo tanto, el desarrollo del dolor patológico después de una lesión tisular. Por su propia definición, se fundamenta en la prevención de un proceso alterado de las aferencias sensitivas y el impacto que tiene sobre el control del dolor agudo postoperatorio, la transición de dolor agudo a dolor crónico y la amplificación del estímulo nociceptivo agudo. Este capitulo presenta un resumen de las intervenciones de analgesia preventiva con mayor grado de evidencia en la literatura para aminorar el dolor agudo postoperatorio.

Abstract: The term of preventive analgesia is not a new concept, since it was first described in 1988. This concept (that we could call «antinociceptive treatment¼) argues that pain relief before surgery may improve the management of postoperative acute pain, by planning a pre-trans-operative analgesia and aims to prevent the sensitization of the central nervous system, therefore the development of pathological pain after a tissue injury. By its own definition, it is based on the prevention of an altered process from some sensorial afferent pathways and the impact it has on the control of postoperative acute pain, the transition from acute pain to chronic pain and the amplification of acute nociceptive stimulation. This chapter presents a summary of the interventions of preventive analgesia with the highest level of evidence in literature to ameliorate postoperative acute pain.

Analgesia preventiva con diclofenaco endovenoso en niños operados por cirugía general de forma electiva / Preventive analgesia with intravenous diclofenac for elective paediatric general surgery

Introducción: El dolor es un síntoma tan antiguo como la propia humanidad y ha formado parte inseparable de esta. Objetivo: Evaluar la efectividad de la analgesia preventiva con diclofenaco en el dolor posoperatorio en niños operados por cirugía general electiva. Método: Se realizó un estudio prospectivo, cuasiexperimental, en 230 niños operados por cirugía general electiva. La muestra se distribuyó en dos grupos; analgesia preventiva con diclofenaco (grupo estudio), versus dipirona por vía rectal (grupo control). Las variables analizadas fueron intensidad del dolor, modificaciones hemodinámicas, evolución clínica y eventos adversos. Resultados: En ambos grupos prevalecieron los pacientes entre los 6 y 10 años de edad. En el grupo estudio, el dolor apareció a partir de las 6 h después de la operación, en solo 23 pacientes. No así en el grupo control que desde las 4 h, 19 pacientes refirieron dolor. En el grupo estudio los 23 pacientes tuvieron aproximadamente 2 h de duración del dolor y de ellos, solo 4 con intensidad severa; mientras que en el control 65 refirieron 2 h de dolor y el resto lo refirieron durante 4 h a pesar del rescate analgésico. Nueve de ellos, presentaron intensidad severa. Algunos pacientes presentaron modificaciones de la tensión arterial, frecuencia cardiaca y respiratoria asociadas al dolor. Los efectos adversos frecuentes fueron náuseas y vómitos. Conclusiones: La administración preventiva de diclofenaco disminuye la intensidad del dolor posoperatorio en los procedimientos quirúrgicos de cirugía general electiva en niños(AU)

Introduction: Pain is a symptom as old as humanity itself and has been an inseparable part of it. Objective: To evaluate the effectiveness of preventive analgesia with diclofenac for postoperative pain in elective paediatric general surgery. Methods: A prospective, quasi-experimental study was carried out with 230 children who underwent elective general surgery. The sample was divided into two groups: preventive analgesia with diclofenac (study group) versus dipyrone by the rectal way (control group). The variables analyzed were pain intensity, hemodynamic modifications, clinical evolution and adverse events. Results: In both groups, patients aged 6-10 years of age prevailed. In the study group, pain onset occurred at 6 hours after surgery, in only 23 patients; not being that way in the control group, in which, at 4 hours, 19 patients reported pain. In the study group, the 23 patients had approximately 2 hours of pain duration and, among them, only 4 hours with severe intensity; while in the control group, 65 patients reported 2 hours of pain and the rest referred it for 4 hours despite the analgesic rescue. Nine of them presented severe intensity. Some patients presented changes in blood pressure, heart rate and breathing associated with pain. The frequent adverse effects include nausea and vomiting. Conclusions: The preventive administration of diclofenac decreases the intensity of posoperative pain in surgical procedures of elective paediatric general surgery(AU)