Complication,Postoperative

Major thoracic surgery is high risk as it carries a significant risk of postoperative Adverse Events (AEs), where patients experience complications and do not recover as expected. These AEs can increase the risk of mortality, hospital length of stay, as well as healthcare costs. The investigators' aim is to improve surgical safety by pioneering a marked advance in preoperative prediction of postoperative AEs that will enable individualized targeted perioperative pathways to prevent postoperative AEs. Given that illness and stress are associated with a loss in physiologic variability (e.g. heart and respiration rate), the investigators will use heart and lung variability assessments to improve prediction of postoperative AEs. Therefore, this study aims to assess the feasibility of implementing a preoperative CardioPulmonary variability assessment; determine if preoperative CardioPulmonary variability is associated with postoperative AEs; and determine if this variability assessment is superior and complementary to existing measures of risk and frailty.

Colorectal cancer is an important cancer worldwide, and its incidence is increasing year by year. A large proportion of patients may require diverting stoma or even permanent stoma after surgery. Some of these patients will have a variety of stoma-related complications, which seriously affect the quality of life of patients. At present, the mainstream postoperative complication classification is the traditional CD classification, which is suitable for the classification of most postoperative complications. However, due to the unique anatomical characteristics of patients with stoma, the current CD classification system may not be suitable for the classification of patients with stoma-related complications. Therefore, we plan to establish a registry database of colorectal cancer patients with stoma, explore the attribution and incidence of stoma-related complications, and propose a new improved classification system, the SITI classification, on the existing CD classification, for verification and promotion.

SUMMARY Rationale: Prophylactic antibiotics in laparoscopic surgeries, including Metabolic Bariatric Surgery (MBS), are routinely provided to reduce postoperative infections, especially at wound incision sites. However, since incisional wound infections in laparoscopic MBS are rare and morbidity is very low, the benefit of antibiotic prophylaxis is questionable. Objective: Evaluate the non-inferiority of omitting antibiotic prophylaxis in MBS. Compare postoperative outcomes between Group A (no antibiotics) and Group B (standard antibiotic care) to determine if omission increases complications, particularly wound infections. Study Design: Randomized controlled trial (RCT), double-blind. Study Population: Patients with obesity eligible for MBS. Intervention: * Group A (No Antibiotic Prophylaxis): Undergo MBS without antibiotics to test safety regarding postoperative complications, focusing on surgical site infections (SSIs). * Group B (Standard Antibiotic Prophylaxis): Receive standard one-time antibiotics before incision. Main Study Parameters/Endpoints: Compare the incidence of incisional and organ/space SSIs within six weeks post-surgery between Group A and Group B to determine if omitting antibiotics affects infection rates.

This randomized clinical trial aims to compare the effectiveness of heparin alone versus combination therapy of Heparin- Aspirin in improving free flap survival in patients undergoing reconstructive surgery. Participants will be randomly assigned to receive either heparin or a combination therapy, and the primary outcome measure will be the survival rate of the free flap at various time points post-surgery