The necessity for long-term antibiotic therapy with positive arterial wall cultures.
The results of treatment after excision of infected arterial grafts were analyzed as a function of aortic/arterial wall cultures and duration of antibiotic therapy in 33 patients. Four patients died during surgery and 29 patients were observed for periods ranging from 2 weeks to 76 months. Negative arterial wall cultures (NAwC) were found in 16 patients, three of whom died of multiple-organ failure and sepsis but none of whom had aortic/arterial disruption/hemorrhage. Positive arterial wall cultures (PAwC) were found in 13 patients, seven of whom received short-term, broad-spectrum antibiotics for less than 10 days (PAwC-STA) and six of whom received long-term culture-specific antibiotic therapy (intravenous therapy for 6 weeks and oral therapy for 6 months) (PAwC-LTA). Five of seven patients in the PAwC-STA group died of aortic disruption or hemorrhage, one patient had severe hemorrhage caused by disintegration of a saphenous vein patch over the common femoral artery, and one patient had a recurrent aortoenteric fistula. There were 10 episodes of arterial disruption/hemorrhage in those seven patients. All episodes of aortic/arterial disruption/hemorrhage occurred in the PAwC-STA subgroup (seven of seven patients) and none occurred in the PAwC-LTA subgroup (none of six patients) (0.005 less than p less than 0.001). The incidence of aortic/arterial disruption/hemorrhage was significantly different between overall PAwC (7 of 13 patients) vs NAwC (none of 16 patients) (0.005 less than p less than 0.001) and NAwC-STA (none of 16 patients) vs PAwC-STA (seven of seven patients) (0.001 less than p less than 0.0005).(ABSTRACT TRUNCATED AT 250 WORDS)
University of Arizona Health Science Center.
J M
JM
Malone
S G
SG
Lalka
K E
KE
McIntyre
V M
VM
Bernhard
T S
TS
Pabst
D000368:Aged; D000369:Aged, 80 and over; D000900:Anti-Bacterial Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D001011:Aorta / Q000382:microbiology* / Q000601:surgery; D001158:Arteries / Q000382:microbiology* / Q000601:surgery; D001424:Bacterial Infections / Q000517:prevention & control*; D001705:Bioprosthesis / Q000009:adverse effects; D001807:Blood Vessel Prosthesis / Q000009:adverse effects*; D005069:Evaluation Studies as Topic; D005260:Female; D005500:Follow-Up Studies; D006470:Hemorrhage / Q000209:etiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000401:mortality / Q000517:prevention & control*; D011292:Premedication; D012189:Retrospective Studies; D013048:Specimen Handling; D013997:Time Factors
D000900:Anti-Bacterial Agents