Limb Ischemia

The goal of this \*\*clinical trial\*\* is to compare the effectiveness of \*\*low-dose rivaroxaban plus aspirin versus aspirin alone\*\* in patients aged 40-70 years with \*\*chronic limb-threatening ischemia, diabetes mellitus, hypertension, and hypercholesterolemia\*\*. The main questions it aims to answer are: * Does low-dose rivaroxaban plus aspirin reduce \*\*major adverse limb events (MALE)\*\*, such as acute limb ischemia and amputation? * Does the combination therapy reduce \*\*major adverse cardiovascular events (MACE)\*\*, such as myocardial infarction and stroke, and improve limb-related outcomes? Researchers will compare \*\*low-dose rivaroxaban (2.5 mg twice daily) plus aspirin (75-100 mg daily)\*\* with \*\*aspirin alone\*\* to see if combination therapy provides better outcomes over a period of \*\*6 months\*\*. Participants will: * Undergo baseline clinical assessment, blood tests, ABPI/TBI, and Doppler/duplex assessment. * Be randomly assigned to either the rivaroxaban plus aspirin group or the aspirin-alone group. * Attend follow-up visits at specified intervals for assessment of \*\*WIFI score, ABPI, wound healing, MALE, MACE, and quality of life\*\*. * Be assessed for treatment compliance, side effects, and bleeding during follow-up.

The LIMB Study is a prospective, observational pilot study evaluating the feasibility of combined non-invasive hemodynamic and lower-limb tissue oximetry monitoring during prolonged minimally invasive pelvic surgeries performed in lithotomy position. Thirty patients will undergo continuous intraoperative monitoring, with the primary outcome being the frequency and duration of tissue oxygen desaturation events and secondary outcomes examining correlations with postoperative limb pain, sensation, and motor function. The study is non-interventional, poses minimal risk, and aims to generate preliminary data to inform future strategies for early detection and prevention of limb ischemia and well-leg compartment syndrome

Acute compartment syndrome (ACS) is a surgical emergency that can develop in patients on extracorporeal membrane oxygenation (ECMO). ACS is a type of limb ischemia, which means that the limb, such as the arm or leg, loses blood flow. Patients on ECMO can develop this condition for many reasons, but most commonly from the ECMO procedure itself. This most commonly involves the leg. Key symptoms of ACS include severe pain, loss of pulses, loss of feeling, and inability to move the limb. However, because patients on ECMO are often sedated, ACS is difficult to diagnose as patients can not report symptoms. As a result, the only available tool for diagnosing ACS may be measurement of pressures in the limb. This is normally done with a needle-device, which is inserted into the leg for a single measurement. However, a recently developed device, called the MY01 Continuous Compartment Pressure Monitor, allows for continuous pressure readings instead of a single measurement. Multiple measurements may allow for much greater accuracy in diagnosing ACS, which may result in faster time to surgery and potentially save more limbs than single measurements. This device may also be less invasive than an older method of continuous pressure measuring, which uses a needle and tubing that is 14-gauge in size. Therefore, this study aims to compare 3 different types of methods for diagnosing ACS in patients on ECMO, which are 1) Standard of Care, 2) Standard of Care and MY01, and 3)Standard of Care and 14-gauge slit catheter.