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Prognostic indicators for vision and mortality in shaken baby syndrome
1Department of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, Nashville, Tenn, USA.
Insights
Nonreactive pupils and midline brain shift are strong indicators of mortality in shaken baby syndrome cases. Ventilatory support, not initial vision, predicts long-term visual outcomes for affected children.
Area of Science:
- Ophthalmology
- Pediatrics
- Forensic Medicine
Background:
- Shaken baby syndrome (SBS) is a severe form of abusive head trauma in infants.
- Ocular findings, particularly retinal hemorrhages, are hallmarks of SBS.
- Understanding prognostic indicators is crucial for managing SBS patients.
Purpose of the Study:
- To investigate ocular and non-ocular signs in SBS patients.
- To identify predictors of visual prognosis and mortality in SBS.
Main Methods:
- Retrospective review of medical records for child abuse cases with bilateral retinal hemorrhages.
- Analysis of visual function, pupillary light reaction, neuroimaging, ventilatory needs, and skeletal injuries.
- Correlation of these findings with visual outcomes and mortality.
Main Results:
- Forty percent of infants had fix-and-follow vision at presentation; 73% achieved it by follow-up.
- Nonreactive pupils and midline brain shift were highly correlated with mortality (P<.001).
- Ventilatory requirement predicted poorer visual outcomes (P<.01).
Conclusions:
- Pupillary reactivity and brain imaging findings (midline shift) are critical prognosticators for mortality in SBS.
- The need for ventilatory support is a significant predictor of visual prognosis, independent of initial visual acuity.
Objective:
To study ocular and nonocular signs of patients diagnosed as having "shaken baby syndrome" and determine prognostic indicators for vision and mortality.
Methods:
Medical records of child abuse cases involving bilateral retinal hemorrhages were reviewed. Particular attention was paid to visual function and pupillary light reaction at the time of admission as well as the location of retinal hemorrhages, neuroimaging findings, ventilatory requirement, and associated skeletal injuries. These findings were correlated with visual prognosis and mortality.
Results:
Thirty consecutive cases met the criteria for review. At the initial visit, mean age of the children was 9.3 months (range, 1-39 months) and 12 children (40%) had at least fix-and-follow vision. Preretinal and intraretinal hemorrhages (93% [n = 28] and 100% [n = 30]) were more common than vitreous hemorrhage (10% [n = 3]). Subdural hematomas were detected in 21 patients (70%). Twenty children (67%) had seizures and 16 (53%) required ventilatory support; bruises and long bone fractures were seen in 14 (47%) and 4 (13%) children, respectively. Eight patients died. All patients with nonreactive pupils on presentation died, while all patients with a pupillary light reaction lived (P<.001). Six (86%) of 7 patients with midline shift died, whereas 21 (91%) of 23 with no midline shift lived (P<.001). At follow-up, retinal hemorrhages had resolved in nearly all children by 4 months, and 16 children (73%) had at least fix-and-follow vision. Ventilatory requirement was associated with poorer vision (P<.01).
Conclusions:
Nonreactive pupils and midline shift of the brain structures correlate highly with mortality. Ventilatory requirement, but not visual acuity on presentation, predicts visual outcome.