PMID: 25771667Mar 17, 2015Paper

Benzalkonium chloride intoxication caused by intravenous self-injection

Chūdoku kenkyū : Chūdoku Kenkyūkai jun kikanshi = The Japanese journal of toxicology
Masato MiyauchiHiroyuki Yokota

Abstract

Benzalkonium chloride (BZK) is widely used as a germicide in hospitals and other places. Although several cases of accidental oral intake of BZK have been reported, there have been few reported cases of BZK toxicity due to intravenous injection. A male nurse in his 40 s injected 15 mL of 10% BZK (Osvan S) directly into his left antebrachial vein while at home, as a suicide attempt. The patient was admitted to our hospital 1 hour later. Acute respiratory distress syndrome (ARDS) was diagnosed by blood gas analysis, chest X-ray, and CT scan. Due to extracorporeal blood purification therapy, including hemoperfusion and plasma exchange, serum BZK became undetectable. However, the ARDS was not improved. Extracorporeal blood purification therapy consisting of continuous hemodiafiltration (CHDF) was continued to treat the ARDS. After performing CHDF for the next 36 hours, improvement of both the PaO2/FiO2 ratio and chest X-ray findings was noted. Tracheal extubation was performed on day 9 and no further complications occurred after this period, he was discharged on day 21. Extracorporeal blood purification therapy is probably effective for treatment of BZK intoxication by intravenous injection.

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