[Impact and intervention of postoperative complications after gastric cancer surgery from a health economics perspective]

Gastric cancer ranks as the third most prevalent malignant tumor in our nation, imposing a substantial health and economic burden. The occurrence of postoperative complications in gastric cancer not only hinders patient recovery but also significantly increases the medical expenditures of patients, contributing supplementary health economic challenges to both society and healthcare institutions. Conducting health economic analysis on postoperative complications in gastric cancer provides evidence for the formulation of health policies, offers guidance for hospital cost control, and furnishes economic insights for the development of new technologies in the prevention and treatment of complications. This paper, through a thorough review of domestic and international literature, comprehensively examines the impact of complication severity on healthcare expenses, delineates the principal contributors to healthcare costs in patients with postoperative complications, and proposes practical strategies to alleviate the health economic burden resulting from such complications. Furthermore, this study delves into and analyzes the health economic considerations associated with postoperative complications within the framework of the Diagnosis Related Groups (DRG) billing model.

Fabrication and Characterization of a New Self-Assembled Monolayer of Fullerene Dicarboxylic Acid Derivative and Its Photoelectric Conversion Property

A new fullerene self-assembled monolayer (SAM) which has the property of photoelectric conversion is reported here. The SAM was fabricated on hydrophilic substrates by an esterification reaction. The SAM is characterized by contact angle, AFM, UV spectrum, and cyclic voltammetry. A cathodic photocurrent of 226 nA/cm(2) was obtained. Copyright 2000 Academic Press.

[Effects of ranitidine on ventricular refractory period and fibrillation threshold of normal and ischemic ventricle in rabbits]

Effects of ranitidine (Ran) on ventricular refractory period and fibrillation threshold of normal and ischemic ventricle were investigated in pentobarbitone anesthetized rabbits. In saline-treated rabbits, relative refractory period (RRP) and effective refractory period (ERP) were shortened from 132 +/- 24 to 126 +/- 25 ms (n = 10, P < 0.05) and from 118 +/- 22 to 108 +/- 27 ms (n = 10, P < 0.05) in boundary zone of ventricular ischemic regions, respectively. The ventricular fibrillation threshold (VFT) was decreased from 5.5 +/- 1.4 to 2.8 +/- 1.1 V (n = 10, P < 0.01) after coronary artery ligation (CAL). Ran (25 mg.kg-1, i.v.) not only prevented these changes, but also lengthened RRP from 123 +/- 14 to 136 +/- 10 ms (P < 0.05) and ERP from 111 +/- 16 to 126 +/- 12 ms (P < 0.05), and increased VFT from 4.7 +/- 0.8 to 7.4 +/- 1.8 V (P < 0.01) in normal ventricle. The results suggest that Ran may have anti-arrhythmic effects in rabbits.

[Localization of the origin of ventricular arrhythmia by means of Frank's vectorcardiogram]

Frank's lead system vectorcardiogram (VCG) was used to record the ventricular arrhythmias (VA) of different areas induced by pacing in 22 canines and by stimulating the epicardium of different areas in 8 patients of mitral stenosis during operation. The results showed that VCG can localize the origin of VA of 13 areas in canines and 9 areas in human. To localize the VA at or near ventricular septum VCG is more accurate than ECG (94% vs 70%).