Obesity significantly influences gastrointestinal and hepatic functions, presenting various challenges and risks in medical management.
- Altered Hepatic Function: The liver's ability to metabolize drugs is modified in obese individuals due to changes in liver function, which can affect the efficacy and safety of medications.
- Increased Risk of Regurgitation and Aspiration: The elevated pressure required for ventilation in obese patients, coupled with the potential for difficult mask ventilation, heightens the risk of gastric content regurgitation and aspiration into the lungs.
- Higher Gastric Volume and Lower pH: Obesity can lead to delayed gastric emptying, attributed to increased abdominal mass. This results in a higher volume of gastric contents with a lower pH, increasing the risk of severe pneumonitis in the event of aspiration.
- Increased Intra-Abdominal Pressure: Excess body weight leads to heightened intra-abdominal pressure, which can reduce functional residual capacity (FRC), cause aortocaval compression, and diminish tissue perfusion. This compression impacts not only respiratory mechanics but also cardiovascular function, complicating anesthesia and surgical interventions.
