Impact of the Use of Regional Poison Control Centers in an Urban EMS Dispatch System

Ambulance referrals to an Australian Poisons Information Centre: a retrospective series

INTRODUCTION

For poisoned patients, ambulance services may be the first point of contact for medical attention. With limited training in toxicology, ambulance services are encouraged to contact the Poisons Information Centre (PIC) for advice. This study aims to characterise referrals to a PIC from a state ambulance service with the purpose of improving information delivery and efficient use of these services.

METHODS

This was a retrospective observational series of referrals to an Australian state PIC from ambulance staff from 1 January 2020 to 31 December 2020. Referrals were identified through the PIC Pharmhos database where the call originated from either a paramedic or emergency dispatch officer. Call reports were reviewed to extract data on patient demographics, exposure details and advice provided by the PIC.

RESULTS

There were 1537 calls regarding 1420 poisoning exposures over the 12-month period, with 117 (7.6%) follow-up calls, representing 4.1% (1537/37835) of total calls to the PIC. Initial calls originated from paramedics in 999/1420 (70.4%) referrals, with dispatch officers referring 421/1420 (29.6%). Paediatric patients aged <15 years were involved in 492/1420 (34.6%) exposures with the commonest age range being 1-4 years. Most referrals involved pharmaceuticals exposures (756/1420 [53.2%]) followed by chemicals (557/1420 [39.2%]) and drugs of abuse (69/1420 [4.9%]). The commonest agents involved were paracetamol followed by quetiapine and sertraline. The PIC advised no treatment following benign exposures in 617/1420 (43.5%) calls, first aid measures in 333/1420 (23.5%) calls, supportive measures in 339/1420 (23.9%) calls and specific treatment in 32/1420 (2.3%) calls. Referral to the hospital was advised in 761/1420 (53.6%) calls, the majority of these were following deliberate self-poisonings (428/1420 [30.1%]).

CONCLUSIONS

Ambulance staff commonly contact the PIC following benign exposures where no treatment is required. Ambulance referral to a PIC following suspected poisonings may have a role in preventing unnecessary transfer to hospital in poisoned patients.

Unintentional Pediatric Poisoning Exposures in an Emergency Department: A Comparison of Poison Control Center Referrals and Caregiver Self-Referred Visits

OBJECTIVES

The purpose of this study is to describe the demographics and clinical characteristics of patients referred to a pediatric emergency department (ED) for unintentional poisoning exposures by a poison control center (PCC) compared with patients/caregivers who self-refer.

METHODS

The electronic data warehouse at a pediatric hospital was queried from October 1, 2014, to September 30, 2015, for unintentional poisoning-related ED visits and subsequent inpatient admissions. Eligible patients aged 18 years and younger were identified by International Classification of Diseases, Ninth Revision, Clinical Modification codes for pharmaceuticals, non-pharmaceuticalchemicals, fumes/vapors, foreign bodies, adverse food reactions, food poisoning, and bites/stings. Referral classification (PCC referral vs self-refer) was determined by PCC and hospital medical records.Descriptive statistics were used to characterize the patient demographics and ED visits by referral classification and age group. Simple and multiple logistic regression models examined the individual and combined impact of demographic and clinical characteristics on self-referral.

RESULTS

Of the 705 patients identified, 84.4% presented as caregiver/self-referred compared with PCC-referred. As compared with those who self-referred, a higher percentage of patients who contacted the PCC before ED presentation were white (93.9% [89.4-98.2%] vs 83.8% [80.7-86.7%]) and had commercial insurance (62.7% [51.5-69.5%] vs 53.0% [48.9-57.0%]). Pharmaceutical (71.9%) and chemical (14.0%) exposures were the most common exposure types for PCC-referred patients whereas foreign bodies (54.3%) were the most common for self-referred patients. The largest predictors of self-referral were age, insurance, and exposure type.

CONCLUSIONS

Among patients presenting at 1 pediatric ED, disparities with PCC utilization exist among age groups, racial identification, and poison exposure type. Educational outreach interventions are needed to ensure optimal use of the PCC services by patients, caregivers, and health care professionals.