Sawada et al developed the Severity Index of Paraquat Poisoning (SIPP) to evaluate a patient with acute paraquat poisoning. The authors are from Kogoshima University in Kogoshima, Japan.
Parameters:
(1) serum paraquat concentration on admission in µg/mL (mg/L)
(2) time in hours from ingestion to start of intensive treatment (up to 192 hours)
SIPP =
= (time to treatment in hours) * (serum paraquat concentration on admission in µg/mL)
SIPP
Outcome
< 10
survival
10 - 49.9
respiratory failure
>= 50
circulatory failure
where:
• The decisions lines are defined as cutoff (10 or 50) divided by time to treatment = (10 / (hours)) or (50 / (hours)).
Limitations:
• The precise time of ingestion may not be known with certainty.
time of survival in hours =
= 10 ^ (4.14 - (1.25 * LOG10(SIPP)))
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