Effect and mechanism of needleless transcutaneous neuromodulation on gastrointestinal function after pancreaticoduodenectomy.

BACKGROUND

Gastrointestinal motility disorders tend to develop after pancreaticoduodenectomy (PD). The objectives of this study were: (1) to investigate the impact of needleless transcutaneous neuromodulation (TN) on the postoperative recuperation following pancreaticoduodenectomy (PD), and (2) to explore the underlying mechanisms by which TN facilitates the recovery of gastrointestinal function after PD.

METHODS

A total of 41 patients scheduled for PD were randomized into two groups: the TN group ( = 21) and the Sham-TN group ( = 20). TN was performed at acupoints ST-36 and PC-6 twice daily for 1 h from the postoperative day 1 (POD1) to day 7. Sham-TN was performed at non-acupoints. Subsequent assessments incorporated both heart rate variation and dynamic electrogastrography to quantify alterations in vagal activity (HF) and gastric pacing activity.

RESULTS

1)TN significantly decreased the duration of the first passage of flatus ( < 0.001) and defecation ( < 0.01) as well as the time required to resume diet ( < 0.001) when compared to sham-TN;2)Compared with sham-TN, TN increased the proportion of regular gastric pacing activity ( < 0.01);3) From POD1 to POD7, there was a discernible augmentation in HF induced by TN stimulation( < 0.01);4) TN significantly decreased serum IL-6 levels from POD1 to POD7 ( < 0.001);5) TN was an independent predictor of shortened hospital stay(β = - 0.349,  = 0.035).

CONCLUSION

Needleless TN accelerates the recovery of gastrointestinal function and reduces the risk of delayed gastric emptying in patients after PD by enhancing vagal activity and controlling the inflammatory response.