Implementation of First-Line Rapid Genome Sequencing in Non-Critical Care Pediatric Wards

Area of Science:

• Genetics
• Pediatric Medicine
• Genomic Sequencing

Background:

• Genetic disorders are a significant cause of morbidity in children.
• Timely and accurate genetic diagnosis is crucial for effective management and improved patient outcomes.
• Traditional genetic testing methods can be slow, delaying critical treatment decisions.

Purpose of the Study:

• To evaluate the impact of rapid exome sequencing (rES) and rapid genome sequencing (rGS) as first-line tests on diagnostic yield.
• To assess the effect of rES/rGS policy implementation on the time to precise genetic diagnosis (PrGD) in pediatric patients.
• To determine the influence of these rapid sequencing methods on patient outcomes in non-critical care settings.

Main Methods:

• Retrospective chart review of 218 pediatric inpatients in a general pediatric ward.
• Comparison of patients before (pre-May 6, 2022) and after (post-May 6, 2022) the policy allowing rES/rGS as first-line tests.
• Analysis of diagnostic yield and time to PrGD for patients undergoing genetic consultations.

Main Results:

• First-line rES/rGS yielded a PrGD in 42.3% of cases.
• The proportion of rES/rGS tests ordered increased from 14.5% to 79.8% after policy implementation.
• The average time to PrGD decreased dramatically from 289 days preimplementation to 13 days postimplementation.

Conclusions:

• Implementing rES and rGS as first-line tests in hospitalized children significantly increases access to precise genetic diagnoses.
• Rapid sequencing strategies substantially shorten the time required for genetic diagnosis in pediatric patients.
• The use of rES/rGS in non-critical care settings improves patient outcomes by enabling faster diagnosis and intervention.