Etomidate alleviates ovarian ischemia-reperfusion injury in rats.

BACKGROUND: This study investigates the protective effects of etomidate against oxidative damage in an experimental model of ovarian ischemia-reperfusion injury. METHODS: A total of 24 female rats were randomized into three groups. Group 1 served as the control. Group 2 underwent an ovarian torsion/detorsion procedure. Group 3 underwent similar procedures as Group 2; additionally, 4 mg/kg of etomidate was administered intraperitoneally 30 minutes before ovarian detorsion. Blood samples were analyzed for lipid peroxidation, pro-inflammatory cytokine levels, and antioxidant enzyme activity RESULTS: Biochemical analysis of blood samples revealed reductions in pro-inflammatory cytokines, including interleukin-1 Beta (IL-1ß), interleukin-6 (IL-6), and tumor necrosis factor-alpha (TNF-α), in Group 3 compared to Group 2 (p=0.005, p=0.016, and p<0.001, respectively). Additionally, a decrease in malondialdehyde (MDA) levels was observed in Group 3 compared to Group 2 (p<0.001). In contrast, activities of antioxidant enzymes, including superoxide dismutase (SOD) and glutathione peroxidase (GSH-PX), were significantly increased in Group 3 compared to Group 2 (p=0.031 and p=0.001, respectively). Furthermore, Group 3 demonstrated notable reductions in histopathological scores for follicular degeneration, vascular occlusion, bleeding, and inflammation compared to Group 2 (p<0.001, p<0.001, p<0.001, and p=0.001, respectively). CONCLUSION: Etomidate alleviates ischemia-reperfusion injury in a rat ovarian torsion-detorsion model by improving both histopathological and biochemical outcomes.

Effects of ketamine on penile tissues in an experimental priapism model in rats.

BACKGROUND: This study aimed to evaluate the histopathological and biochemical effects of ketamine on penile tissues following ischemia-reperfusion injury induced by priapism. METHODS: Twenty-four male rats were randomized into three groups. Group 1 served as the control group. Group 2 underwent the priapism model to induce ischemia-reperfusion injury. Group 3, the treatment group, experienced a similar ischemia-reperfusion model as Group 2; additionally, 50 mg/kg of ketamine was administered intraperitoneally just before reperfusion. Blood biochemical analyses and penile histopathological evaluations were performed. RESULTS: In Group 3, significant improvements were observed in all histopathological scores, including desquamation, edema, inflammation, and vasocongestion compared to Group 2 (p<0.001). Blood biochemical analyses showed that the malondialdehyde (MDA) levels were recorded as 10 in Group 2, with a significant decrease in Group 3 (p=0.013). Similarly, proinflammatory cytokine levels, including interleukin-1 beta (IL-1ß), interleukin-6 (IL-6), and tumor necrosis factor-alpha (TNF-α), were found to be suppressed in Group 3 compared to Group 2 (p=0.003, p=0.022, and p=0.028, respectively). Antioxidant enzyme activities, such as glutathione peroxidase (GSH-Px) and superoxide dismutase (SOD), were higher in Group 3 compared to Group 2 (p=0.016 and p=0.024, respec-tively). CONCLUSION: Ketamine is an effective anesthetic agent in alleviating the effects of penile ischemia-reperfusion injury.

Perioperative analgesic efficacy of bilateral superficial cervical plexus block in patients undergoing thyroidectomy: a randomized controlled trial / Eficácia analgésica perioperatória do bloqueio bilateral do plexo cervical superficial em pacientes submetidos à tireoidectomia: estudo clínico randomizado

Abstract Introduction: Bilateral superficial cervical plexus block (BSCPB) is a common method used for analgesia in thyroid surgery. We investigated the analgesic efficacy of bilateral superficial cervical plexus block in the intraoperative and postoperative periods. Materials and methods: Patients (n = 46) undergoing thyroidectomy were randomly separated into the following 2 groups: the general anesthesia group (GA; n = 23) and the general anesthesia plus BSCPB group (GS; n = 23). The intraoperative analgesic requirement (remifentanil) and visual analog scale (VAS) score at multiple time points during the postoperative period (after extubation, at 15 , 30 minutes and 1, 2, 6, 12, 24, and 48 hours post operation) were evaluated. Total tramadol and paracetamol consumption as well as the amount of ondansetron used was recorded. Results: The intraoperative remifentanil requirement was significantly lower in the GS Group than in the GA Group (p= 0.009). The postoperative pain scores were significantly lower in the GS Group than in the GA Group at 15 (p< 0.01), 30 (p< 0.01) minutes, and 1 (p< 0.01), 2 (p< 0.01), 6 (p< 0.01), 12 (p< 0.01) and 24 (p= 0.03) hours. The postoperative tramadol requirement was significantly lower in the GS Group than in the GA Group (p= 0.01). The number of patients that used ondansetron was significantly lower in the GS Group than in the GA Group (p= 0.004). Conclusion: We concluded that BSCPB with 0.25% bupivacaine reduces the postoperative pain intensity and opioid dependency in thyroid surgery patients.

Resumo Introdução: O bloqueio bilateral do plexo cervical superficial (BPCS) é um método comumente usado para analgesia em tireoidectomia. Avaliamos a eficácia analgésica do bloqueio bilateral do BPCS nos períodos intraoperatório e pós-operatório. Materiais e métodos: Os pacientes (n = 46) submetidos à tireoidectomia foram randomicamente separados em dois grupos para receber anestesia geral (Grupo GA; n = 23) e anestesia geral mais bloqueio bilateral do BPCS (Grupo GS; n = 23). Avaliamos a necessidade de analgésico no intraoperatório (remifentanil) e os escores VAS (Visual Analog Scale) em vários momentos no pós-operatório (após a extubação, aos 15 e 30 minutos e em 1, 2, 6, 12, 24 e 48 horas de pós-operatório). O consumo total de tramadol e paracetamol e a quantidade usada de ondansetrona foram registrados. Resultados: A necessidade de remifentanil no intraoperatório foi significativamente menor no Grupo GS do que no Grupo GA (p = 0,009). Os escores de dor pós-operatória foram significativamente menores no Grupo GS do que no grupo GA aos 15 (p < 0,01) e 30 (p < 0,01) minutos e em 1 (p < 0,01), 2 (p < 0,01), 6 (p < 0,01), 12 (p < 0,01) e 24 (p = 0,03) horas de pós-operatório. A necessidade de tramadol no pós-operatório foi significativamente menor no Grupo GS do que no grupo GA (p = 0,01). O número de pacientes que recebeu ondansetrona foi significativamente menor no Grupo GS do que no Grupo GA (p = 0,004). Conclusão: O bloqueio bilateral do BPCS com bupivacaína a 0,25% reduz a intensidade da dor pós-operatória e a dependência de opioides em pacientes submetidos à tireoidectomia.

The effects of transversus abdominis plane block on analgesic and anesthetic consumption during total abdominal hysterectomy: a randomized controlled study / Efeitos do bloqueio do plano transverso abdominal sobre o consumo de analgésico e anestésico durante histerectomia abdominal total: um estudo randômico e controlado

Abstract Background and objectives: A transversus abdominis plane block is a peripheral block method that has been used successfully for pain relief after total abdominal hysterectomy. However, the effects of the combination of the transversus abdominis plane block and general anesthesia on analgesic and anesthetic requirements remain unclear. This randomized placebo-controlled study is aimed to evaluate the effects of transversus abdominis plane block on analgesic and anesthetic consumption during total abdominal hysterectomy under general anesthesia. Methods: Sixty-six women undergoing total abdominal hysterectomy were randomized into two groups to receive general anesthesia alone (control group) or with transversus abdominis plane block using 20 mL of 0.25% bupivacaine (transversus abdominis plane group). Intraoperative remifentanil and sevoflurane consumption were recorded. We also evaluated the postoperative pain, nausea, quality of recovery scores and rescue analgesic requirement during postoperative 24 hours. Results: The total remifentanil and sevoflurane consumption is significantly lower in transversus abdominis plane group; respectively mean (SD) 0.130 (0.25) vs. 0.094 (0.02) mcg.kg-1.min-1; p < 0.01 and 0.295 (0.05) vs. 0.243 (0.06) mL.min-1; p < 0.01. In the postoperative period, pain scores were significantly reduced in transversus abdominis plane group soon after surgery; median (range) 6 (2-10) vs. 3 (0-5); p < 0.001, at 2 h (5 [3-9] vs. 2.5 [0-6]; p < 0.001), at 6 h (4 [2-7] vs. 3[0-6], p < 0.001), at 12 h (3.5 [1-6] vs. 2 [1-5]; p = 0.003). The patients in the transversus abdominis plane group had significantly higher QoR-40 scores 190.5 (175-197) vs. 176.5 (141-187); p < 0.001). Conclusion: Combining transversus abdominis plane block with general anesthesia can provide reduced opioid and anesthetic consumption and can improve postoperative pain and quality of recovery scores in patients undergoing total abdominal hysterectomy.

Resumo Justificativa e objetivos: O bloqueio do plano transverso abdominal é um método de bloqueio periférico que tem sido usado com sucesso para alívio da dor após histerectomia abdominal total. No entanto, os efeitos da combinação do bloqueio do plano transverso abdominal e da anestesia geral sobre a necessidade de analgésico e anestésico ainda não estão claros. Este estudo randômico e controlado com placebo tem como objetivo avaliar os efeitos do bloqueio do plano transverso abdominal sobre o consumo de analgésico e anestésico durante histerectomia abdominal total sob anestesia geral. Métodos: Foram randomizadas em dois grupos 66 mulheres submetidas à histerectomia abdominal total para receber apenas anestesia geral (grupo controle) ou associada a bloqueio do plano transverso abdominal com 20 mL de bupivacaína a 0,25% (grupo plano transverso abdominal). O consumo de remifentanil e sevoflurano no período intraoperatório foi registrado. Também avaliamos a dor pós-cirurgia, náusea, qualidade dos escores de recuperação e necessidade de analgésico de resgate durante as 24 horas de pós-operatório. Resultados: O consumo total de remifentanil e sevoflurano foi significativamente menor no grupo plano transverso abdominal, respectivamente, média (DP): 0,130 (0,25) vs. 0,094 (0,02) mcg.kg-1.min-1; p < 0,01 e 0,295 (0,05) vs. 0,243 (0,06) mL.min-1; p < 0,01. No pós-operatório, os escores de dor foram significativamente reduzidos no grupo plano transverso abdominal logo após a cirurgia; mediana (intervalo): 6 (2-10) vs. 3 (0-5); p < 0,001, em 2 h (5 [3-9] vs. 2,5 [0-6]; p < 0,001), em 6 h (4 [2-7] vs. 3 [0-6], p < 0,001), em 12 h (3,5 [1-6] vs. 2 [1-5]; p = 0,003). As pacientes do grupo plano transverso abdominal apresentaram escores QoR-40 significativamente maiores: 190,5 (175-197) vs. 176,5 (141-187); p < 0,001). Conclusão: A combinação de bloqueio do plano transverso abdominal e anestesia geral pode proporcionar um consumo reduzido de opioides e anestésicos e melhorar a dor pós-cirúrgica e a qualidade dos escores de recuperação em pacientes submetidas à histerectomia abdominal total.