The role of computed tomography in determining delayed intervention for gunshot wounds through the liver

Gunshot wounds through the liver are highly lethal and are prone to delayed morbidity due to late complications.

A retrospective study was performed to determine the incidence, morbidity, and need for late interventions in patients shot through the liver, and the role of post-injury CT in making those determinations.

83 patients were shot through the liver. Injury grades were: Grade V-12 (14 %), Grade IV-41 (49 %), Grade III-12 (14 %), Grade II-8 (10 %), Grade I-1 (1 %), and nine were ungraded. Ten (12 %) died in the ED, three (4 %) died in the OR, and two (2 %) died postoperatively. Of the 68 survivors, 52 (76 %) had follow-up CT scans performed a median of 7 days (95 % CI 2-13 days) after injury. Seventeen (33 %) had 25 complications related to the bullet tract: 12 (48 %) abscesses, 6 (24 %) infected hematomas, 3 (12 %) bilomas, 3 (12 %) unclassified fluid collections, and 1 (4 %) hepatic necrosis. Treatment included CT-guided drainage in 15 (60 %), ultrasound-guided drainage in 3 (12 %), surgical drainage and debridement in 2 (8 %), and observation in 5 (20 %). Overall morbidity rate including hepatic and non-hepatic complications was 74 % (50/68). Patients having their CT scan-determined intervention (for all complications) within 7 days of injury (n = 24), compared to those having their CT scan-determined intervention on day 8 or later (n = 28), had a significantly decreased rate of overall complications and morbidity (p = 0.03). This difference was due to early detection and intervention for abscesses, anastomotic breakdown, and missed injuries. Those having a CT scan within 7 days of injury also had a significantly reduced length of stay compared to those scanned on day 8 or later (median 14 days, 95 % CI 4-24 days versus 18 days, 95 % CI 6-30 days, p = 0.05).

Gunshot wounds to the liver have a high morbidity and mortality rate. Survivors should have a follow-up CT scan performed within 7 days to allow detection and intervention for complications, as this dramatically decreases the overall morbidity rate and length of stay.