Preemptive analgesia with ibuprofen increases anesthetic efficacy in children with severe molar hypomineralization: a triple-blind randomized clinical trial

Abstract Molar incisor hypomineralization (MIH) is often accompanied by dental hypersensitivity and difficulty in achieving effective analgesia. Objective: This study evaluated the effectiveness of preemptive analgesia in children with severe MIH, post-eruptive enamel breakdown, and hypersensitivity. Methodology: Ibuprofen (10 mg/kg child weight) or placebo was administered, followed by infiltrative anesthesia and restoration with resin composite. Hypersensitivity was evaluated in five moments. The data were analyzed using the chi-square test, Fisher's exact test, and t-test. Results: Preemptive analgesia provided benefits for the treatment of severe cases of MIH, with an increase in the effectiveness of infiltrative anesthesia and improved patient comfort during the restorative procedure. Conclusion: Preemptive analgesia has shown efficacy in reducing hypersensitivity during restorative dental procedures, evidencing the significance of this study for patients with MIH and hypersensitivity.

Analgesia preemptiva em cirurgias de implantes dentais: (i) revisão sistemática e meta-análise; (ii) ensaio clínico triplo-cego, paralelo, randomizado e controlado por placebo / Preemptive analgesia in dental implant surgery: (i) systematic review and meta analysis; (ii) triple-blind, parallel, randomized and placebo-controlled clinical trial

Não existem evidências suficientes, para recomendar um regime analgésico específico, para o controle da dor em analgesia preemptiva, após cirurgia de implante dentário. Isto sinaliza a necessidade de estudos adicionais. Esta pesquisa apresenta dois estudos com objetivos distintos: (1) avaliar a eficácia da analgesia preemptiva em cirurgias de implantes dentais por meio de uma revisão sistemática e meta-análise de ensaios clínicos randomizados. (2) avaliar e comparar por meio de um ensaio clínico randomizado (ECR), paralelo, controlado por placebo, a efetividade da analgesia preemptiva em cirurgias de implantes dentais unitários, buscando identificar dentre os analgésicos e anti-inflamatórios não esteroidais (AINES) [eterocoxibe (ETERO), ibuprofeno (IBU), nimesulida (NIME) e acetaminofeno (ACETA)], qual possui maior eficácia no alívio da dor pós-operatória e na redução do uso da medicação de resgate comparados ao uso do placebo. Esta revisão sistemática com meta-análise seguiu as diretrizes PRISMA e foi registrada no PROSPERO (CRD42020168757). Cinco estudos foram incluídos na revisão e quatro foram incorporados à meta-análise. Uma meta-análise de efeito randômico comparou a eficácia da medicação preventiva em comparação ao placebo. Para a interpretação dos resultados utlizamos a certeza da evidência usando a abordagem Grading of Recommendations, Assessment, Development and Evaluation (GRADE) e a magnitude do efeito, de acordo com as diretrizes do GRADE. Todos os estudos demonstraram que a medicação preemptiva contribuiu para uma melhora significativa da dor pós-operatória. No entanto, o desvio médio padrão (DMP) geral agrupado mostrou, que, a medicação preventiva teve um efeito pequeno em comparação com o placebo, na redução da dor (DMP: -0,43; IC: -0,71; -0,15), com baixa certeza da evidência. Essa metanálise mostrou que a magnitude do efeito foi maior seis a oito horas após a cirurgia (efeito grande), comparada ao tempo de uma a duas horas, após a cirurgia (efeito pequeno). Concluiu-se que a analgesia preventiva pode ter um efeito positivo na redução da dor em comparação ao não uso de medicação preemptiva. No entanto, as evidências são ainda insuficientes. O ECR com inserção de implante dental unitário envolveu 135 indivíduos, com média de idade de 57,1 (±11,2), de ambos os gêneros alocados em 5 grupos (ETERO, IBU, NIME, ACETA e placebo). A ocorrência, tempo e a intensidade da dor foram analisados por meio testes de teste Qui-quadrado, Exato de Fisher, ANOVA e modelos de equações de estimativas generalizadas quando adequados. Todos os medicamentos testados proporcionaram um efeito benéfico da analgesia preemptiva. Isso foi demonstrado pela redução da dor pós-operatória e do menor uso de medicação de resgaste. O grupo IBU apresentou significativamente maiores escores de dor que os outros três grupos testes (IBU>ETERO=NIME=ACETA), que foram equivalentes entre si. Apesar da ocorrência de significância estatística, do ponto de vista da relevância clínica, a diferença entre os grupos foi pequena e todos os grupos apresentaram baixos escores de dor. Assim, sugerimos que a tomada de decisão em relação à escolha do medicamento deve considerar, também, a relação de custo-benefício, efeitos adversos e características individuais dos pacientes. Em adição, estudos futuros em cirurgias implantodônticas extensas (maior número de implantes inseridos e com enxertos ósseos/gengivais) apresentando alto rigor metodológico, ainda se faz necessário. (CAEE 83534618.5.0000.5149)

There is insufficient evidence to recommend a specific analgesic regimen for pain management in preemptive analgesia after dental implant surgery, signaling the need for further studies. This research presents two studies with different objectives: (1) to evaluate the effectiveness of preemptive analgesia in dental implant surgeries through a systematic review and meta-analysis of randomized clinical trials. (2) to evaluate and compare, through a randomized clinical trial (RCT), parallel, controlled by placebo, the effectiveness of preemptive analgesia in single dental implant surgeries, seeking to identify among analgesics and non-steroidal anti-inflammatory drugs (NSAIDs) [ eterocoxib (ETERO), ibuprofen (IBU), nimesulide (NIME) and acetaminophen (ACETA)], which is more effective in relieving postoperative pain and reducing the use of rescue medication compared to the use of placebo. The systematic review with meta-analysis was conducted by PRISMA guidelines and registered in PROSPERO (CRD42020168757). Five studies were included in the review and four were incorporated into the meta-analysis. A random-effect meta- analysis compared the effectiveness of preventive medication compared to placebo. The interpretation of the results followed the certainty of the evidence using the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) approach together with the magnitude of the effect according to the GRADE guidelines. All studies demonstrated that preemptive medication contributed to a significant improvement in postoperative pain. However, the pooled overall mean standard deviation (SMD) showed that preventive medication had a small effect compared with placebo in reducing pain (SMD: -0.43; CI: -0.71; -0.15) with low certainty of evidence. Our meta-analysis showed that the magnitude of the effect was greater six to eight hours after surgery (large effect), compared to one to two hours after surgery (small effect). It was concluded that preventive analgesia can have a positive effect in reducing pain compared to not using preemptive medication, but the evidence is still insufficient. The RCT with single dental implant insertion involved 135 individuals, with a mean age of 57.1 (±11.2), of both genders allocated into 5 groups (ETERO, IBU, NIME, ACETA and placebo). The occurrence, duration and intensity of pain were analyzed using Chi- square, Fisher's Exact, ANOVA and generalized estimating equation models when appropriate. All drugs tested provided a beneficial effect of preemptive analgesia demonstrated by reduced postoperative pain and reduced use of rescue medication. The IBU group had significantly higher pain scores than the other three test groups (ETERO, NIME and ACETA), which were equivalent to each other. Despite the occurrence of statistical significance, from the point of view of clinical relevance, the difference between the groups was small and all had low pain scores. Thus, we suggest that the decision making regarding the choice of medication should also consider the cost-benefit ratio, adverse effects and individual characteristics of patients. In addition, future studies in extensive implant dentistry surgeries (greater number of implants inserted and with bone/gingival grafts) presenting high methodological rigor are still necessary. (CAEE 83534618.5.0000.5149)

Preemptive use of intravenous ibuprofen to reduce postoperative pain after lower third molar surgery: a systematic review of randomized controlled trials

This study aimed to systematically review the literature to assess the effect of preemptive intravenous ibuprofen on pain reduction after lower third molar surgery. Nine databases (PubMed, Scopus, LILACS, SciELO, Embase, Web of Science, Cochrane, Open Gray, and Open Thesis) were used as sources of research, including "grey literature." The protocol was registered in PROSPERO. Only randomized clinical trials evaluating the effects of preemptive intravenous ibuprofen on pain during and immediately after the extraction of lower third molars were included, without restrictions of year and language. Two reviewers independently performed the study selection, data extraction, and assessment of the risk of bias. The "Joanna Briggs Institute for Randomized Controlled Trials" tool was used to assess the risk of bias. Each study was categorized according to the percentage of positive responses to the questions corresponding to the assessment instrument. The results were measured narratively/descriptively. The initial search resulted in 3,257 records, of which only three studies (n=150 participants) met the eligibility criteria and were included in the qualitative analysis. All studies were published in 2019. The risk of bias ranged from low to moderate. Two studies found significant pain reduction within 48 h after the procedure. In conclusion, the use of preemptive intravenous ibuprofen for extracting third molars reduces pain and analgesic consumption after the surgical procedure.

Comparative study between electroacupuncture at Neima point and Neiguan (PC 6) and epidural nerve block for preemptive analgesia in patients undergoing thoracic surgery / 中国针灸

OBJECTIVE@#To compare the clinical effect between electroacupuncture (EA) at Neima point and Neiguan (PC 6) and epidural nerve block for preemptive analgesia in patients undergoing thoracic surgery.@*METHODS@#Sixty patients with elective radical esophagectomy were randomly divided into a group A, a group B and a control group, 20 cases in each group. The patients in the group A were treated with injection of 20 mL 0.375% ropivacaine at epidural space 30 min before anesthesia induction, followed by normal anesthesia during operation; the patients in the group B were treated with 30 min EA at bilateral Neima point and Neiguan (PC 6) before anesthesia induction, followed by normal anesthesia during operation; the patients in the control group were treated with general anesthesia alone. Patient-controlled intravenous analgesia was applied for all the patients. The mean arterial pressure (MAP) and heart rate (HR) were recorded at the following time points: before acupuncture/epidural puncture (T@*RESULTS@#The MAP at T@*CONCLUSION@#The preemptive analgesia of EA at Neima point and Neiguan (PC 6) and epidural nerve block could both provide effective perioperative analgesia for thoracic surgery. The EA could better maintain intraoperative hemodynamics and has less physiological disturbance.

Efficacy and safety of preemptive analgesia with gabapentinoids for patients undergoing arthroscopic shoulder surgery: a systematic review and meta-analysis / Eficacia y seguridad de la analgesia preventiva con gabapentinoides para pacientes sometidos a cirugía artroscópica de hombro: una revisión sistemática y metanálisis

Abstract: Objective: To assess the efficacy and safety of preemptive analgesia with gabapentinoids for patients undergoing arthroscopic shoulder surgery. Material and methods: A PRISMA-compliant systematic review and meta-analysis was conducted in PubMed, Cochrane Library and ScienceDirect databases. Randomized Controlled Trials (RCTs) comparing gabapentinoids (gabapentin and pregabalin) with placebo in patients undergoing shoulder arthroscopic surgery were retrieved. The primary endpoint was the visual analogue scale (VAS) score at 24 hours and cumulative morphine consumption at 24 hours. The secondary outcomes were complications of nausea/vomiting, sedation and dizziness. After tests for publication bias and heterogeneity among studies were performed, data were aggregated for random-effects models when necessary. Results: Five clinical studies (gabapentin group n = 4 and pregabalin group n = 1) were ultimately included in the meta-analysis. Gabapentinoids were associated with reduced pain scores at 24 hours. Similarly, gabapentinoids were associated with a reduction in cumulative morphine consumption at 24 hours. Furthermore, gabapentinoids can significantly reduce the occurrence of nausea/vomiting. There were no significant differences in the occurrence of sedation and dizziness. Conclusions: Preoperative use of gabapentinoids was able to reduce postoperative pain, total morphine consumption, and morphine-related complications following arthroscopic shoulder surgery. Further studies should determine the optimal dose and whether pregabalin is superior to gabapentin in controlling acute pain after shoulder surgery.

Resumen: Objetivo: Evaluar la eficacia y seguridad de la analgesia preventiva con gabapentinoides para pacientes sometidos a cirugía artroscópica del hombro. Material y métodos: Se llevó a cabo una revisión sistemática y metaanálisis conforme a PRISMA en las bases de datos PubMed, Cochrane Library y ScienceDirect. Se recuperaron ensayos controlados aleatorios (RCT) que comparaban los gabapentinoides (gabapentina y pregabalina) con placebo en pacientes sometidos a cirugía artroscópica del hombro. El punto final principal fue la puntuación de la escala analógica visual (VAS) a las 24 horas y el consumo acumulado de morfina a las 24 horas. Los resultados secundarios fueron complicaciones de náuseas/vómitos, sedación y mareos. Después de realizar pruebas de sesgo de publicación y heterogeneidad entre los estudios, se agregaron datos para modelos de efectos aleatorios cuando fue necesario. Resultados: En última instancia, se incluyeron en el metaanálisis cinco estudios clínicos (grupo de gabapentina n = 4 y grupo de pregabalina n = 1). Los gabapentinoides se asociaron con puntuaciones de dolor reducidas a las 24 horas. Del mismo modo, los gabapentinoides se asociaron con una reducción en el consumo acumulado de morfina a las 24 horas. Además, los gabapentinoides pueden reducir significativamente la aparición de náuseas/vómitos. No hubo diferencias significativas en la ocurrencia de sedación y mareos. Conclusiones: El uso preoperatorio de gabapentinoides fue capaz de reducir el dolor postoperatorio, el consumo total de morfina y las complicaciones relacionadas con la morfina después de la cirugía artroscópica del hombro. Otros estudios deben determinar la dosis óptima y si la pregabalina es superior a la gabapentina en el control del dolor agudo después de la cirugía de hombro.

To Compare Analgesic Effect Of Two Different Doses Of Oral Pregabalin As Premedication In Patients Undergoing Abdominal Hysterectomy Under Spinal Anaesthesia

Background-In preemptive analgesia, the analgesic treatment is started before and is operational during the surgical procedure so that the physiological consequences of nociceptive transmission are reduced. Because of this protective effect on nociceptive pathways, preemptive analgesia decreases the incidence of hyperalgesia and allodynia after surgery.Methods-This Hospital based, prospective, randomized, double blind, comparative study was conducted in Department of Anaesthesiology, Sawai Man Singh Medical College after obtaining approval from Institutional Ethics Committee and Research Review Board and written informed consent from all the patients.Results- The mean duration of analgesic was 4.97 ± 2.98 hrs in group Aafter which first rescue analgesic was required in group A, 6.49±2.98 hrs in group B and 7.26±2.51 hrs in group C. The mean duration of analgesia after which second rescue analgesic was required was 9.77±1.95 hrs for group A, 13.36±5.21 hrs for group B and 13.13±4.15 hrs for group C. The mean duration of analgesia after which third rescue analgesic was required was 15.43±3.58 hrs for group A, 15.94±3.42 hrs for group B and 17.25±0.35 hrs for group C.Conclusion-We conclude that pregabalin 75 mg is better drug for preemptive analgesia and it can be used safely as a part of multoimodal analgesia regimens.

Effects of preemptive analgesia by nalbuphine combined with flurbiprofen on pain and platelet activity in patients with decompensated cirrhosis / 吉林大学学报(医学版)

Objective: To observe the influence of preemptive analgesia by nalbuphine combined with flurbiprofen in the platelet activity indexes of the patients with decompensated cirrhosis, and to explore its quality of analgesia in the patients with decompensated cirrhosis. Methods: A total of 120 patients with decompensated cirrhosis were randomly divided into combination group (40 cases, given nalbuphine combined with flurbiprofen before anesthesia), nalbuphine group (40 cases, given nalbuphine before anesthesia) and flurbiprofen group (40 cases, given flurbiprofen before anesthesia). The postoperative patient-controlled intravenous analgesia (PCIA) was carried out with sufentanil in all the patients. The indexes of visual analog score (VAS), PCIA compression number, sufentanil consumption, Ramsay score, thrombelastogram (TEG) indexes (R value, K value, a angle, MA value and CI value) and the maximum aggregation rate by arachidonic acid (MARAA) and β-endorphin (β-EP) level, recovery time, and agitation occurrence rate of the patients in various groups were recorded 12 h and 24 h after operation. Results: The indexes of VAS, PCIA compression number, sufentanil consumption and 3-EP level of the patients in combination group were lower than those in the other groups 12 and 24 h after operation (P0. 05). The Ramsay scores of the patients in three groups had no differences at 12 and 24 h after operation (P>0. 05). Compared with nalbuphine group, the R values and K values of the patients in combination group and flurbiprofen group at 12 and 24 h after operation were increased (P 0. 05). The recovery time of the patients among three groups had no significant difference (F=2. 054, P=0. 102). The agitation occurrence rate during recovery period of the patients in case group was the highest (F=5. 624, P= 0. 001), and there was no significant difference in the agitation occurrence rate during recovery period of the patiens between nalbuphine group and flurbiprofen group (χ2 =3. 020, P=0. 091). Conclusion: Combination of nalbuphine and flurbiprofen in the patients with decompensated cirrhosis before analgesia can improve the quality of postoperative analgesia and can' t inhibit the activity of platelet obviously.

Effect of preemptive electroacupuncture on pain reactions in primiparous parturients during vaginal delivery / 针刺研究

OBJECTIVE: To investigate the effect of preemptive electroacupuncture (EA) plus epidural block (EB) on pain reactions and stress hormone levels in primiparous parturients during labor. METHODS: A total of 104 primiparous parturients undergoing vaginal delivery were randomly divided into PA group (n=31), sham EA group (n=36) and EA group (n=37). EA (2 Hz/100 Hz, a tolerable strength) was applied to bilateral Hegu (LI4) and Sanyinjiao (SP6) beginning from the latency of the 1st birth process when the orifice of uterus was opened to about 1 cm wider till the active stage when the orifice of the uterus opened about 3 cm wider. Patients in the sham EA group received shallow acupuncture needle stimulation (without cutaneous penetration of the needle tip, and without stimulation electric current output). All the patients of the 3 groups were given EB (1% Lidocaine, 0.05% Sufentanil and 0.1% Ropivacaine) and patient-controlled epidural analgesia (PCEA) when the orifice of the uterus opened about 3 cm wider. The pain severity was assessed by using Visual Analogue Scale (VAS) at time-points of immediately after EA, 1 h after EA, 2 h after EA, immediately after EB, 1 h after EB, 2 h after EB and full open of the uterus orifice. The contents of serum adrenocorticotrophic hormone (ACTH) and cortisol (COR) were assayed by using ELISA. RESULTS: There was no significant difference in the VAS score at the immediate time of post-EA among the three groups (P>0.05). Compared with the EB group, the VAS scores at all time-points except the immediate time of post-EA were significantly decreased in the EA group (P<0.05). One and 2 h after EB, and after full open of the uterus orifice, the VAS scores in the 3 groups were all evidently decreased (P<0.05), and those of the EA group were significantly lower than those of the sham EA and EB groups (P<0.05). The three groups had a significant increase in the levels of serum ACTH and COR at time-points of 1 and 2 h after EA, immediately after EB, and when the orifice of the uterus was fully opened (P<0.05), presenting a gradual increase of their level during the course of labor. Compared with the EB group, the levels of serum ACTH and COR contents were considerably decreased in the EA group (rather than in the sham EA group) (P<0.05). The dosages of Ropivacaine and Sufentanil, the total pressing times and the effective pressing times of PCEA pump were significantly lower in the EA group than those in the EB and sham EA groups (P<0.05). CONCLUSION: EA plus epidural analgesia, given during the latency period of labor, can effectively alleviate pain, inhibit stress response and reduce the dosage of anesthetics in primiparous parturients throughout the labor process.

Effect of preoperative intervention of electroacupuncture at point on postoperative complications of procedure for prolapsed and hemorrhoids / 中国针灸

OBJECTIVE@#To explore effective treatments that can alleviate postoperative complications in patients with procedure for prolapsed and hemorrhoids (PPH).@*METHODS@#Sixty patients with pre-mixed hemorrhoids PPH were randomly divided into a simple operation group and a preoperative electroacupuncture intervention group, 30 cases in each group. PPH routine treatment was given in the simple operation group. Electroacupuncture (EA) was applied at point 30 min before PPH in the preoperative electroacupuncture intervention group, and EA was applied at Ciliao (BL 32) and Xialiao (BL 34) for 30 min. The scores of anus pendant, pain degree and persistent time and first urination time were compared within 24 h after operation between the two groups.@*RESULTS@#The scores of anal pendant and pain degree in the 6 h, 12 h, 18 h, the persistent time of anal pendant and pain degree within 24 h and first urination time were better in the preoperative electroacupuncture intervention group than those in the simple operation group, and there were statistically significant differences (all <0.05).@*CONCLUSION@#Electroacupuncture at point 30 min before PPH can not only decrease the degrees of anal pendant and pain in the 6 h, 12 h, 18 h, but also shorten the persistent time of anal pendant and pain within 24 h after surgery and promote the first urination.

Eficacia de la Analgesia Preoperatoria con Antiinflamatorios no Esteroidales (Aines) en Cirugía de Terceros Molares. Revisión de la Literatura / Efficacy of Preemptive Analgesia with Nonsteroidal Anti-Inflammatory Drugs (Nsaids) in Third Molar Surgery. Literature Review

RESUMEN: El manejo del dolor postoperatorio en cirugía de desinclusión de terceros molares es fundamental. El uso de antiinflamatorios no esteroidales (AINES), son considerados como una excelente alternativa para el manejo del dolor, siendo administrados tanto postoperatorios, como preoperatorios. El propósito de la presente revisión bibliográfica fue establecer la eficacia y seguridad de la analgesia preoperatoria con antiinflamatorios no esteroidales en desinclusiones quirúrgicas de terceros molares en las que hubiera remoción parcial o total de hueso. Se realizó una búsqueda en las bases de datos: PubMed, EBSCO, Cochrane Library y Scielo; usando las palabras claves: Preemptive Analgesia, NSAID, Oral Surgery. Trece artículos fueron seleccionados, sumando un total de 875 pacientes evaluados. Si bien varios autores consideraron la analgesia preoperatoria con AINES, como un método eficaz, hacen falta más estudios que demuestren su eficacia en cirugía oral.

SUMMARY: The management of postoperative pain in third molar surgery is fundamental. The use of nonsteroidal antiinflammatory drugs (NSAIDs) are considered an excellent alternative for pain management, administered both, postoperative and preoperative. The purpose of this review is to establish the efficacy and safety of preemptive analgesia with nonsteroidal antiinflammatory drugs in surgical disinclusions of third molars, in which at least partial bone was removed. We conducted a search in databases like: PubMed, EBSCO, Cochrane Library and Scielo; using the key words: Preemptive Analgesia, NSAID, Oral Surgery. Thirteen articles were selected, in total of 875 patients evaluated in the selected articles. Although several authors considered preemptive analgesia with NSAIDs as an effective method, more standardized studies are needed to demonstrate its effectiveness in oral surgery.

Observation of preemptive analgesia of tramadol hydrochloride sustained-release tablets for cutaneous venous malformation polidocanol sclerotherapy / 中华整形外科杂志

Objective@#To investigate the clinical effect and safety of tramadol hydrochloride sustained-release tablets for subcutaneous venous malformation polidocanol sclerotherapy.@*Methods@#The experimentation was designed in block randomization. 106 patients with subcutaneous venous malformations from May 2016 to November 2017, which in line with the inclusion criteria, were randomly divided into experimental group and control group, with 53 cases in each group. Experimental group patients took 100 mg tramadol hydrochloride sustained-release tablet 1 hour before operation, while control group patients took nothing. Both group underwent polidocanol foam injection therapy guided by the color ultrasound, to observe the effect of operative analgesia, postoperative analgesia (VAS grade) and complications. The data was analyzed by SPSS 19.0 software. Comparison between two groups was done with independent sample t test and P<0.05 was considered statistically significant.@*Results@#The pain sensation(VAS grade) in surgery in experimental group(3.02±1.118)were significantly reduced than control group(6.30±1.514) (t=-12.701, P=0.000). 2 hours after operation the pain sensations decreased in both groups, but experimental group(0.23±0.577)were still better than which in control group(0.60±0.987)(t=-2.403, P=0.018). Three patients of experimental group(5.7%) felt mild nausea, and no other severe complications nor adverse effects occured.@*Conclusions@#Oral tramadol hydrochloride sustained-release tablets is one of safe, simple and effective way to achieve satisfactory preemptive analgesia for venous malformation polidocanol foam sclerotherapy.

Study on application effect of cyclooxygenase-2 inhibitor in perioperative pain management in patients with laparoscopic cholecystectomy / 重庆医学

Objective To investigate the application effect of selective cyclooxygenase-2 (COX-2) inhibitor in perioperative preemptive on-demand analgesia of the patients with laparoscopic cholecystectomy under enhanced recovery after surgery(ERAS).Methods The clinical data in 206 cases of gallstones undergoing selective COX-2 inhibitor for preemptive analgesia (new type analgesic group) from June to December 2015 and 198 cases of gallstones undergoing tramadol postoperative analgesia (traditional analgesia group) in the biliary surgery department of West China Hospital of Sichuan University were retrospectively analyzed.The intraoperative anesthesia schemes in the two groups were consistent.The same pain resolution scheme was adopted after operation.Then the VAS pain score,pain relief drug use rate,adverse reactions,analgesic satisfaction and hospitalization time were compared between the two groups.Results The VAS scores at postoperative 2,6,12,24 h in the new type analgesia group were lower than those in the traditional analgesia group,the difference was statistically significant (P＜0.05);the analgesic drug use rate in the new type analgesia group was lower than that in the traditional analgesia group (14.56％ vs.44.95％,P＜0.05),and the use rate of tramadol hydrochloride and pethidine hydrochloride was lower than that in the traditional analgesia group (P＜0.05).The incidence rate of adverse reactions in the new type analgesia group was lower (2.43％ vs.36.36％,P＜0.05).The incidence rate of nausea and vomiting in the new type analgesia group was lower than that in the traditional analgesia group (P＜0.05),and the incidence rate of other complications had no statistically signifiwas higher than that in the traditional analgesia group (P＜0.05);the average hospital stay and postoperative hospital stay had no statistical difference between the two groups (P＞0.05).Conclusion COX-2 inhibitors can effectively reduce perioperative pain degree in the patients with laparoscopic cholecystectomy,reduces the use frequency of analgesic drugs,shortens the hospital stay time and increases the patient satisfaction.cant difference (P＞0.05).The perioperative patient analgesia satisfaction the in the new type analgesia group

Advances of Butorphanol in Clinical Research / 中国医师进修杂志

Pain is a common and crucial problem in clinical practice, because it has a profound influence on patients in perioperative period. Butorphanol, among plenty of analgesics, is widely used in clinical trials for its various advantages and better analgesic effects. As a typical agonist-antagonist opioid analgesic agent, butorphanol, however, shows different clinical manifestations with different affinity for opioid receptors 25∶4∶1 (κ∶μ∶δ). Besides, butorphanol provides remarkable analgesic and sedative effect in preemptive analgesia, induction and recovery period in general anesthesia, and postoperative analgesia And it could be as a adjuvant to local anaesthesia either. Compared with other opioid drugs, butorphanol is less likely to have side effect on respiratory depression. In addition, its physical dependence is extremely low.

Effect and Safety of Paracoxib Sodium on Preemptive Analgesia by Endoscopic Submucosal Dissection / 医药导报

Objective To investigate the preemptive analgesic effect and safety of paracoxib sodium in patients under-going endoscopic submucosal dissection(ESD). Methods A total of 80 ASA I or II patients aged 35-65 years undergoing ESD under general anesthesia were randomized into two groups(n=40 each):parecoxib sodium group(group B) was received intrave-nous parecoxib sodium 40 mg (in 5 mL 0.9% sodium chloride solution) 10 min before anesthesia induction and control group (group A)was received 0.9% sodium chloride solution 5 mL instead of parecoxib sodium.At the end of operation,patients in both groups were received 5 mg of dezocine.Blood samples were analyzed for PT,TT,APTT,Fib,PLT and PAgT before induction of an-esthesia,at 30 min and 120 min after operation.Patients'Visual analogue scale(VAS),Numeric sedation scale(NSS),and ad-verse reactions were recorded at the end of the operation,2,4 and 6 h after operation. Results Compared with those before parecoxib sodium administration,the fibrinogen concentration and PAgT were significantly higher in group B at 30 min after the intravenous injection of parecoxib sodium(P<0.05),while there was no significant difference in PT,TT,APTT and platelet count between group B and group A(P>0.05).VAS at the end of operation,2,4 and 6 h after operation were lower in group B(P<0.05),and the patients were more satisfied in group B(P<0.05). Conclusion Parecoxib could temporarily enhance blood co-agulation in patients undergoing ESD and could offer safe and effective analgesia.

Preemptive application of QX-314 attenuates trigeminal neuropathic mechanical allodynia in rats

The aim of the present study was to examine the effects of preemptive analgesia on the development of trigeminal neuropathic pain. For this purpose, mechanical allodynia was evaluated in male Sprague-Dawley rats using chronic constriction injury of the infraorbital nerve (CCI-ION) and perineural application of 2% QX-314 to the infraorbital nerve. CCI-ION produced severe mechanical allodynia, which was maintained until postoperative day (POD) 30. An immediate single application of 2% QX-314 to the infraorbital nerve following CCI-ION significantly reduced neuropathic mechanical allodynia. Immediate double application of QX-314 produced a greater attenuation of mechanical allodynia than a single application of QX-314. Immediate double application of 2% QX-314 reduced the CCI-ION-induced upregulation of GFAP and p-p38 expression in the trigeminal ganglion. The upregulated p-p38 expression was co-localized with NeuN, a neuronal cell marker. We also investigated the role of voltage-gated sodium channels (Navs) in the antinociception produced by preemptive application of QX-314 through analysis of the changes in Nav expression in the trigeminal ganglion following CCI-ION. Preemptive application of QX-314 significantly reduced the upregulation of Nav1.3, 1.7, and 1.9 produced by CCI-ION. These results suggest that long-lasting blockade of the transmission of pain signaling inhibits the development of neuropathic pain through the regulation of Nav isoform expression in the trigeminal ganglion. Importantly, these results provide a potential preemptive therapeutic strategy for the treatment of neuropathic pain after nerve injury.

The effects of ropivacaine combined with dexmedetomidine for target thoracic paravertebral nerve blocks by multiple injections for preemptive analgesia on postoperative analgesia of patients of pulmonary cancer undergoing thoracotomy / 中国医师进修杂志

Objective To evaluate the efficacy of dexmedetomidine mixed with ropivacaine for thoracic paravertebral nerve blocks by multiple injections for preemptive analgesia on postoperative analgesia of patients undergoing thoracotomy. Methods Ninety patients, all genders, ASA Ⅰ or Ⅱ, aged 35-64, BMI 18-24 kg/m2, undergoing radical operation for esophageal carcinoma were randomly divided into three groups (each group 30 patients): group C received general anesthesia, group R received ropivacaine for thoracic paravertebral nerve block and group RD received dexmedetomidine mixed with ropivacaine for thoracic paravertebral nerve block.Three groups all used intravenous infusion of propofol, refentanyl and inhalation sevoflurane for anesthesia maintenance, and PCIA pump started before the end of surgery in 3 groups.Meanwhile, group R and group RD received ultrasound-guided T4-T8thoracic paravertebral nerve blocks by multiple injections on operation side preoperatively.In group R, the mixture of 0.5% ropivacaine 19 ml and 1ml of normal saline was injected, and in group RD, the mixture of dexmedetomidine 1 μg/kg and 19 ml of 0.5% ropivacaine was injected.The analgesia process lasted 48 h after surgery of these 3 groups, and the VAS score was maintained<4 points.When the VAS score was 4 or more points, intravenous injection of morphine 5- 10 mg was delivered. Postoperative PCIA liquid and morphine consumption, somnolence, nausea, vomiting, respiratory depression, itching and urinary retention was recorded. Additionally, the occurrences of adverse events about thoracic paravertebral nerve blocks were recorded.Results The dosages of propofol, refentanyl in group R and group RD were lower than those in group G:(7.2 ± 0.6),(6.1 ± 0.5)mg/(kg·h)vs.(8.1 ± 0.5)mg/(kg·h), and there were significant differences(P<0.05).The dosage of propofol in group RD was lower than that in group R: (6.1 ± 0.5) mg/(kg·h) vs. (7.2 ± 0.6) mg/(kg·h), and there was significant difference (P <0.05). Compared with group G, the consumption of PCIA liqud and the usage rate of morphine was reduced in group R and group RD (P < 0.05); the consumption of PCIA liqud and the usage rate of morphine was lower in group RD than that in group R(P<0.05).The rate of nausea and vomiting and itch in group R and group RD was lower than that in group G,and there were significant differences(P<0.05). No significant difference in somnolence showed between three groups (P > 0.05). Conclusions Ropivacaine combined with dexmedetomidine for target thoracic paravertebral nerve blocks by multiple injections for preemptive analgesia can significantly improve the efficacy of postoperative analgesia after thoracotomy, meanwhile,it can also save the dosage of anesthetic drugs during the operation.

Preemptive analgesic effect of administration timing of parecoxib sodium in patients with total hip arthroplasty / 重庆医学

Objective To investigate the clinical preemptive analgesic efficacy of parecoxib sodium(PS) at different administration timing in the patients with total hip arthroplasty(THA).Methods Sixty patients receiving THA were prospectively enrolled and randomized into three groups.The group A started to be intravenously injected by PS 40mg/d on preoperative 3 d until operation day;the group B was intravenously injected by parecoxib sodium 40mg at preoperative 30 min;the group C began to be intravenously injected by the same dosage of normal saline at the same time point as the group A.The rest pain was assessed by using the visual analog scale(VAS) at postoperative 6,24,48,72 h.The duration of patient-controlled intravenous analgesia(PCIA) and total dosage were recorded.The first time unaided ambulation time was observed.Results The VAS scores at various postoperative time points in the group A and B were significantly lower than those in the group C(P＜0.05),the VAS scores at postoperative 6,24 h in the group A were remarkably lower than those in the group B.The PCIA duration in the group A,B and C were 25.05±10.32),(36.75± 13.91),(50.40 ± 15.17)h,respectively,the pair-wise comparison of the group A,B and C showed statistical difference(P＜0.05).The total dosages of PCIA drug in the group A,B and C were(29.25 ± 4.58),(34.50 ± 5.09),(62.65 ±10.52)tg,respectively,the dosage in the group A and B was significantly lower than that in the group C(P＜0.05).The first time unaided ambulation time in the group A,B and C were (2.75 ± 0.81),(3.05 ± 1.08),(4.10 ±-0.92)d respectively,which in the group A and B was earlier than that in the group C (P＜0.05).Conclusion Continuously using PS on preoperative 3 d can increase the analgesic effect in THA patients and is conducive to the functional rehabilitation and increase the patient satisfaction.

Effects Observation of Preemptive Analgesia of Parecoxib-sodium for Radical Mastectomy of Breast Cancer / 中国药房

OBJECTIVE:To investigate the effects of preemptive analgesia of parecoxib-sodium for radical mastectomy of breast cancer. METHODS:A total of 60 female patients underwent selective radical mastectomy of breast cancer under general anes-thesia were randomly divided into observation group(40 cases)and control group(20 cases). 15 min before anesthesia induction, observation group was given intravenous injection of Parecoxib-sodium for injection 40 mg. Control group was given intravenous in-jection of 0.9% Sodium chloride injection 5 mL. The pain visual analogue scale(VAS),the frequency of patient controlled intrave-nous analgesia(PCA)and ADR were observed between 2 groups at different time points after surgery. RESULTS:VAS scores of observation group were significantly lower than those of control group 2,4,6,8 h after operation,and the frequency of PCA 0-4, 4-12,12-24,24-36 h after operation was significantly lower than control group,with statistical significance(P0.05). CONCLUSIONS:The preemptive analgesia of parecoxib-sodium can effectively reduce pain degree of patients with breast cancer after radical mastectomy,the frequency of PCA, and do not increase the occurrence of ADR.

Efficacy of gabapentin in preemptive analgesia for hysterectomy: a meta-analysis of randomized controlled trials / 临床麻醉学杂志

Objective To evaluate the efficacy and safety of gabapentin in preemptive analgesia for hysterectomy after general anesthesia.Methods PubMed, Cochrane, Embase, Ovid, Springer Link, Web of Science, CNKI, Wanfang and Weipu databases were searched for randomized placebo-controlled trials involving the efficacy of gabapentin for preemptive analgesia published from 2000 to 2016.The methodological quality of the included randomized controlled trial (RCT) was assessed and the data were extracted according to the Cochrane Handbook.The meta-analysis was performed using the RevMan 5.3 software.Results A total of 10 RCTs involving 609 patients were included.Compared with the control group, there was a significant decrease in 24-hour cumulative narcotic consumption at 24 hours when gabapentin was administered before surgery (WMD=-8.83 mg, 95%CI-12.70——4.97, P<0.001), there was no significant decrease in VAS score in preemptive analgesia group (WMD=-7.70 mm, 95%CI-18.22-2.82, P=0.15).Compared with the control group, the rate of vomiting was less in the gabapentin group (RR=0.49, 95%CI 0.35-0.69, P<0.001).Compared with the placebo group, there was no significant decrease in nausea (RR=0.73, 95%CI 0.45-1.17, P=0.19) and somnolence (RR=2.08, 95%CI 0.62-6.92, P=0.23).Conclusion Preemptive administration of gabapentin is effective in decreasing accumulation of opium and vomiting.

Clinical Obseration of Parecoxib Preemptive Analgesia Combined with Postoperative Epidural Analgesia at Hip Replacement Patients / 中国药房

OBJECTIVE:To observe the effects of parecoxib preemptive analgesia combined with postoperative epidural analgesia on hip replacement and immune function. METHODS:Totally 86 patients undergoing unilateral hip replacement selected from Xining Third People's Hospital during Jan. 2014-Jun. 2016 were divided into observation group and control group according to random num-ber table,with 43 cases in each group. Two groups underwent unilateral hip replacement under spinal epidural anesthesia. Observation group was given Parecoxib sodium for injection 40 mg intravenously 30 min before the end of surgery. Control group was given con-stant volume of normal saline intravenously. Both groups were given epidural analgesia pump(Ropivacaine hydrochloride injection 150 mg+Ondansetron hydrochloride injection 16 mg+Dezocine injection 10 mg,added into normal saline to 100 mL)after surgery with dripping speed of 2 mL/h and patient-controlled time of 15 min. The hemodynamic indexes,analgesic effect,T lymphocyte subsets and NK cells levels were compared between 2 groups at different time points as well as the occurrence of ADR after surgery. RE-SULTS:Two patients of observation group and one patient of control group withdrew from the study. Before surgery,there was no sta-tistical significance in MAP and HR between 2 groups(P>0.05);12,24 h after surgery,MAP and HR of control group were signifi-cantly increased and higher than observation group,with statistical significance(P0.05). There was no statistical significance in VAS score between 2 groups immediately after surgery(P>0.05);6,12,24,48 h after surgery,VAS scores of observation group were signifi-cantly lower than those of control group,with statistical significance(P0.05). CD3+,CD4+and NK cells levels of 2 groups immediately after surgery,CD3+,CD4+,CD4+/CD8+ and NK cells levels of 2 groups at 12,24 h after surgery,CD3+and CD4+of control group at 48 h after surgery all changed significantly;CD3+,CD4+,CD4+/CD8+and NK cells levels of observation group at 12,24 h after sur-gery were significantly higher than those of control group,with statistical significantly(P0.05). CONCLUSIONS:The parecoxib preemptive analgesia combined with postopera-tive epidural analgesia shows good analgesic effect for hip replacement patients,keeps their hemodynamics stable and protects immune function to certain extent with good safety.