Introduction: Ingestion of common household cleansing products resulting in a need for intubation is not uncommon in Hong Kong. The objective of this study was to determine the factors that affect the mortality in this group of patients. Methods: This was a retrospective cohort study conducted in the Hong Kong Poison Information Centre, encompassing data from all Accident and Emergency Departments in Hong Kong over the period of 1 January 2008 to 31 January 2019. This study was conducted by recruiting all patients who had ingested common household cleansing products and required intubation in the same hospital admission. The outcome was death. The study aimed to look at risk factors associated with mortality. Results: Seventy-seven patients were included in the final analysis. The median age was 53 years. The mortality rate was 21%. Univariate analysis (at p < 0.05) indicated that (1) older age, (2) ingestion to intubation time more than 12 h, (3) not admitted to intensive care unit, (4) complication of chest infection, (5) complication of fast atrial fibrillation, and (6) complication of acute kidney injury were factors associated with higher mortality rate. Among these, older age and development of acute kidney injury were statistically significant (p < 0.05) on multivariate analysis. Conclusion: Among patients who ingested household cleansing products and required intubation, older age and development of acute kidney injury were factors strongly associated with mortality.
Background: Analgesic poisoning is common in Hong Kong. Analgesics containing salicylate are easily available. Salicylate poisoning may be encountered in the daily practice of the accident and emergency department. The issue of routine salicylate screening was discussed in a number of articles, and the viewpoints of most authors were that routine salicylate screening was unnecessary. Objectives: The primary outcome is to explore the predictive factors of supratherapeutic peak serum salicylate level (>2.17 mmol/L) and delineate the role of routine screening serum salicylate level in poisoned patients attending the accident and emergency department. Methods: This is a retrospective cohort study. Poisoning cases presented to Hong Kong Poison Information Centre between 1 July 2008 and 31 October 2020 with serum salicylate level checked were included. The demographics, laboratory parameters and clinical outcomes were reviewed. Results: There were 8673 cases included with serum salicylate level checked, accounting for 17% of all poisoning cases. Sixty-six (0.76%) cases had supratherapeutic peak serum salicylate level and 11 (0.13%) of them were undeclared salicylate ingestion. Worse clinical outcomes were observed in cases with supratherapeutic peak serum salicylate level. Univariate analysis showed that tinnitus, hyperthermia, alkalaemia, metabolic acidosis, respiratory alkalosis and therapeutic use of aspirin were significantly associated with supratherapeutic peak serum salicylate level. Variables with p < 0.3 were entered into the backward stepwise logistic regression by likelihood ratio. A clinical prediction rule with three attributes (tinnitus, therapeutic use of aspirin and partial pressure of CO2 <5 kPa) was derived. It showed 100% sensitivity in internal validation. Conclusion: Serum salicylate level should be checked in poisoned patients with (1) tinnitus, (2) the therapeutic use of aspirin or (3) partial pressure of CO2 <5 kPa in arterial or venous blood gas. Routine salicylate screening remained a tool for clinicians not experienced in toxicology.
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