Assess Severity of Organophosphate Poisoning by Peradeniya Organophosphorus Poisoning (Pop) Scale


  • Brinda Mevada
  • Sangita Parikh
  • Kaushika Chaudhari
  • Zalak Gadani
  • Leena Dabhi
  • Vikas Nayi
  • Rohit Zarivala



OP poisoning; POP score; severity.


Background: OP compound poisoning is an important indication for emergency admission in most hospitals
throughout India. WHO estimates that approximately 3 million pesticide poisoning occur worldwide and causing
more than 2,20,000 deaths. Peradeniya Organophosphorus poisoning scale grades the severity of OP poisoning
and assess the prognosis of patients. The present study aims to correlate serum cholinesterase level and the
clinical criteria score described by the POP scale at initial presentation and the severity of poisoning with need for
ventilation and outcome.
Methods: A hospital based cross sectional observational study was conducted over period from october 2017
to october 2019 at tertiary care hospital, Ahmedabad. Total of 75 patients were evaluated for POP scale and
serum cholinesterase levels for assessment of severity of poisoning. POP scale was studied to predict the need for
ventilatory support, duration of hospital stay and outcome.
Conclusion: In our study males were most commonly involved (61%). Most commonly affected age group was
between 25 to 40 years. 72% had mild, 25.33% had moderate, 2.77% had severe op poisoning according to POP
score. Respiratory failure was more common in moderate and severe op poisoning, 68.42% and 100% respectively.
Prolonged icu stay(more than 5 days) was required in moderate and severe group of op posisoning, 63% and 50%
respectively as compared to mild group(16.67%). 100% mortality was noted in severe group, 47.36% was noted in
moderate group.

Author Biographies

Brinda Mevada

Assistant Professor General Medicine Department, AMC MET Medical college Maninagar, Ahmedabad.

Sangita Parikh

Associate Professor, General Medicine Department, AMC MET Medical college, Maninagar, Ahmedabad.

Kaushika Chaudhari

Associate Professor, Smt AMC MET Medical College, Paldi, Ahmedabad

Zalak Gadani

Associate professor, General Medicine Department, AMC MET Medical college, Maninagar, Ahmedabad, Residence:8A, Kalamwadi society, Nr. Shreyas crossing, New Shardamandir road, Paldi, Ahmedabad. 380007,

Leena Dabhi

Professor and HOD medicine, AMC MET Medical College, Maninagar, Ahmedabad, Gujarat.

Vikas Nayi

Resident Doctor, AMC

Rohit Zarivala

Medical Superintendent, Nutan General Hospital, Professor and Head, Department of Forensic Medicine.
Nutan Medical Collegeand Research Center. Visnagar, Gujarat.




How to Cite

Brinda Mevada, Sangita Parikh, Kaushika Chaudhari, Zalak Gadani, Leena Dabhi, Vikas Nayi, & Rohit Zarivala. (2022). Assess Severity of Organophosphate Poisoning by Peradeniya Organophosphorus Poisoning (Pop) Scale. Indian Journal of Forensic Medicine & Toxicology, 16(3), 11–16.