What is the most likely cause of a "popping" sensation in an elderly patient one week post-abdominal surgery when coughing or straining?

The most likely cause of a "popping" sensation in an elderly patient one week post-abdominal surgery when coughing or straining is dehiscence. Dehiscence refers to the separation or opening of a surgical incision or wound, which can occur when the healing tissue is put under stress, such as during coughing or straining.

In elderly patients, several factors can contribute to the risk of dehiscence, including fragile skin, underlying health conditions, and nutritional status. When the sutures or staples that hold the tissue together fail or the tissue layers separate, patients may experience a distinct sensation that can be described as a "pop."

Recognizing dehiscence is critical, especially in the postoperative period, as it can lead to other complications such as infection or the need for further surgical intervention. Understanding this phenomenon helps in post-operative care and monitoring for any abnormal signs that may indicate a compromised surgical site.

Other potential causes like infection, herniation, and seroma might have different presentation symptoms or timing but are less directly related to the immediate sensation felt during activities like coughing or straining.