A Simple Predictive Factor for Mortality in Fontan Surgery: Serum Hypo-Osmolality

Area of Science:

• Pediatric Cardiology
• Cardiovascular Surgery
• Clinical Chemistry

Background:

• The Fontan procedure is a palliative surgery for single-ventricle defects.
• Close postoperative monitoring is crucial for patients after Fontan surgery.
• Serum osmolality is an easily measurable parameter with prognostic value.

Purpose of the Study:

• To investigate the association between serum osmolality and postoperative outcomes in patients who underwent the Fontan procedure.
• To determine if serum osmolality can predict complications after Fontan surgery.

Main Methods:

• Retrospective evaluation of 43 patients who underwent extracardiac Fontan operation.
• Patients were categorized into hypoosmolar, isosmolar, and hyperosmolar groups based on serum osmolality.
• Comparison of demographics, clinical data, and postoperative outcomes across the groups.

Main Results:

• The hypoosmolar group (Group 1) showed statistically significant increases in postoperative intubation duration, hospital stay, and pleural effusion.
• Patients in the hypoosmolar group also required more inotropic support and had higher mortality rates.
• No significant differences were observed in these parameters for the isosmolar and hyperosmolar groups.

Conclusions:

• Decreased serum osmolality may be linked to adverse outcomes following the Fontan procedure.
• Serum osmolality could be a significant determinant of cardiac output post-surgery.
• Monitoring serum osmolality may aid in optimizing postoperative care and improving outcomes.