Impact of patient position and intraabdominal gas used in laparoscopic hysterectomy on optic nerve sheath diameter which reflects intracranial pressure

This study is examining how body position and the inflation of the abdomen with gas during laparoscopic (keyhole) hysterectomy affect pressure inside the skull. During this type of surgery, patients are tilted head-down (Trendelenburg position) and carbon dioxide gas is pumped into the abdomen to create space for the surgeon to work. Researchers believe this combination may increase intracranial pressure, which could potentially cause postoperative headaches or nausea. Women undergoing laparoscopic hysterectomy at the study institution will be recruited. Intracranial pressure will be estimated non-invasively by measuring the diameter of the optic nerve sheath (the tube surrounding the optic nerve) using an ultrasound probe placed on the eyelid at different points during the operation. Postoperative headache and nausea will also be tracked. You may be eligible if you are a woman aged 38–78 who is scheduled for a laparoscopic hysterectomy. People with a history of eye disease, previous eye surgery, neurological disease, or a prior transient ischaemic attack (mini-stroke) cannot participate. This observational study by the University of Health Sciences aims to improve anaesthetic management and patient safety during a very commonly performed gynaecological procedure.