No abstract

Introduction: This study assessed the influence of transcutaneous electrical acupoint stimulation (TEAS) combined with transversus abdominis plane block (TAPB) on the recovery of elderly patients undergoing laparoscopic gastric cancer surgery. Methods: Ninety patients (age C 60 years) undergoing laparoscopic gastric cancer surgery were randomly divided into general anesthesia group (group G), TAPB group (group NG), and TEAS combined with TAPB group (group NTG). Patients in the NTG group received TEAS at PC6, LI4, and ST36 acupoints and TAPB. Patients in the NG group received TAPB. The quality of recovery (QoR) was assessed using the QoR-15 questionnaire. The percentages of T lymphocyte subsets were determined. Consumption of anesthetics, extubation time, visual analog scale (VAS) scores, time of first postoperative Ruyi Xing and Yang Yang are co-first authors.

Background: Adrenaline (Adr) and dexmedetomidine (Dex) are commonly used adjuvants of local anesthetics; however, the difference in the improvement of analgesia of local anesthetics between the 2 adjuvants remains unclear. Objective: The objective of this experimental research was to evaluate the cutaneous analgesic effect of mexiletine (Mex) by coadministration with Dex or Adr. Methods: The effect of a nociceptive block was assessed based on the inhibition of the cutaneous trunci muscle reflex in response to skin pinpricks in rats. The analgesic activity of Mex alone and Mex coadministered with Dex or Adr was evaluated after subcutaneous injections. Subcutaneous injections of drugs or combinations include Mex 0.

As adrenaline, serotonin and norepinephrine are two other vasoconstrictors and both of which have been proved to increase the quality and duration of local anesthetics when added as adjuvants. However, the difference in the improvement of the nociception of local anesthetics between the two adjuvants remains unclear. The purpose of this study was to assess the cutaneous nociception of mexiletine by coadministration with serotonin and norepinephrine. Subcutaneous injection of drugs or combinations includes mexiletine 0.6, 1.8, 6.0 μmol, serotonin 1.6500 μmol, noradrenaline 0.8895 nmol, saline, mexiletine 1.8 and 6.0 μmol, respectively combined with serotonin 0.4125, 0.8250, 1.6500 μmol and noradrenaline 0.0356, 0.1779, 0.8895 nmol, with each injection dose of 0.6 ml. The nociception of mexiletine alone and mexiletine coadministered with serotonin and norepinephrine was assessed after subcutaneous injection. Subcutaneous injections of mexiletine elicited dose-related cutaneous antinociception ( P < 0.05, 0.01, or 0.001). Compared with mexiletine (1.8 μmol), adding norepinephrine (except for lowest dose) and serotonin to mexiletine (1.8 μmol) solutions for skin nociceptive block potentiated and prolonged the action ( P < 0.01 or 0.001). Mexiletine (6.0 μmol) combined with norepinephrine and serotonin extended the duration of cutaneous antinociception when compared with mexiletine (6.0 μmol) alone ( P < 0.05, 0.01, or 0.001). Both serotonin and norepinephrine improve the sensory block and enhances the nociceptive block duration of mexiletine, and serotonin is superior to that of norepinephrine.