Purpose: Surgical resection of remnant gastric cancer (RGC) is technically challenging and difficult. Minimally invasive surgery (MIS) has been adopted for various procedures, but reports of MIS for RGC remain limited. Herein, we report the surgical techniques and short-term outcomes of MIS for RGC. Methods: We conducted a retrospective cohort study involving 61 consecutive RGC patients who underwent open or minimally invasive (laparoscopic or robotic) total gastrectomy for potentially curable RGC at our institution (January 1999–August 2025). A propensity scorematched cohort was used for an exploratory evaluation of the safety and efficacy of MIS for RGC, focusing on feasibility rather than superiority over open surgery. Results: Of these 61 patients, 53 underwent open surgery and eight underwent MIS gastrectomy for RGC. The median age was 70 years. The cohort comprised 53 men and eight women. The initial procedure was open surgery in 58 patients and MIS in three patients.Propensity score matching showed significantly reduced intraoperative blood loss in the MIS group compared with the open surgery group (39 mL vs. 576 mL, p < 0.05), and significantly longer operation time in the MIS group (352 minutes vs. 297 minutes, p < 0.05). Postoperative hospital stay was significantly shorter in the MIS group (12 days vs. 17 days, p < 0.05). The incidence of postoperative pancreatic fistula was lower in the MIS group, although not significantly different (0% vs. 16.7%). Conclusion MIS, including robotic gastrectomy, is feasible and safe for RGC, with potential perioperative benefits requiring multicenter validation.

In engineering, when the degrce of distortion of the waveform of the signal is expressed numerically, a coefficient called a distortion factor is used. In order to determine whether or not itis possible to quantify the difference in pulse waveforms in terms of a distortion factor, the authors carried out a Fourier analysis of the pulse waves of 74 cases (74 males between 20 and 40 years of age), calculating the distortion factor of these pulse waves. Employing the pulse wave scale devised by Zhaofu Fei et al, the Ping mai, Hua mai and Xuan mai were differentiated by means of the amplitude ratio of the dicrotic notch to the ejection wave. As a result of a comparison between the distortion factors of these three groups, the authors were successful in quantifying the differences between the wave forms in terms of a distortion factor.

A total of 120 measurements were made for pulse waveform of the radial artery in 73 male subjects in their twenties to forties. We then calculated the parameters in the four-factor concentrated constant circuit model using the method we had developed. From the waveform of the radial artery, we extracted forms equivalent to those referred to as normal, slippery, and string-like pulses according to the pulse-wave models described in the literature. By comparing these parameters, we could show quantitatively the differences in waveforms and related diagnoses of pulses.