Serum osmolarity does not predict mortality in patients with respiratory failure

Area of Science:

• Critical Care Medicine
• Pulmonary Medicine
• Clinical Chemistry

Background:

• Existing scoring systems for predicting mortality in pulmonary intensive care units (PICU) can be complex and time-consuming.
• Serum osmolarity has shown prognostic significance in various critical conditions, including heart failure and stroke.
• The potential prognostic value of serum osmolarity in patients with respiratory failure is yet to be fully established.

Purpose of the Study:

• To investigate whether serum osmolarity can serve as a rapid and inexpensive predictor of mortality in patients within a pulmonary intensive care unit.
• To compare the prognostic value of serum osmolarity against established scoring systems such as APACHE II, SOFA, mCCI, and NRS-2002.

Main Methods:

• A retrospective study involving 449 patients admitted to a Pulmonary Intensive Care Clinic between January 1, 2020, and December 31, 2020.
• Data collected included serum osmolarity levels, modified Charlson Comorbidity Index (mCCI), APACHE II, SOFA, and Nutrition Risk Screening 2002 (NRS-2002) scores.
• Statistical analysis was performed to compare these parameters between patients who survived and those who died in the PICU.

Main Results:

• The study included 449 patients, with 5.1% mortality in the PICU.
• Significantly higher scores were observed in the mortality group for APACHE II (P=.005), mCCI (P<.001), NRS-2002 (P<.001), and SOFA (P<.001).
• No statistically significant difference in serum osmolarity levels was found between the survivor and mortality groups.

Conclusions:

• Serum osmolarity was not identified as a practical prognostic marker for patients in this pulmonary intensive care unit cohort.
• Established scoring systems (APACHE II, mCCI, NRS-2002, SOFA) demonstrated significant prognostic value for mortality.
• Further research is warranted to explore the role of serum osmolarity in critical care settings.