About

A plain toolkit for the ED chart

Created, written & reviewed by Kim Trinh, MD, board-certified emergency physician · © 2026 · last reviewed June 2026

Kim Trinh, MD

ER Toolkit exists to make you think of the can’t-miss diagnosis — the petechiae on the febrile kid, the mastoid behind the ear pain, the cauda equina behind the back pain — and then to turn what you did about it into a note that holds up. It’s free, ad-free, and everything runs in your browser. It isn’t any one hospital’s rulebook.

Who it’s for

Emergency physicians, physician assistants, nurse practitioners, residents, medical students, and scribes — anyone whose name ends up attached to the reasoning in a chart. For the seasoned, it’s the nudge on a loud shift; for the newer, it’s how the can’t-miss habit gets built. It won’t tell you what to think; it makes sure the dangerous things crossed your mind, and that the chart shows it.

Principles

Original
All content — guides, example phrases, and pack data — is the original work of Kim Trinh, MD, written from scratch and generalized. Examples are synthetic. There is no proprietary, institution-specific, or copied material here.
Private
Every tool runs entirely in your browser. Nothing you type is stored on a server or transmitted. There is no login, no tracking of clinical input, and no patient data anywhere in this project.
Cited
Where a tool references a validated clinical decision instrument, it names the rule and cites the source literature. The full list is on the References page. The instruments belong to their authors; we just point to them.
Current
Each tool and guide is reviewed at least every 12 months — the last-reviewed date appears in every page footer. The referenced decision instruments are re-checked against current guidance on each review; if a rule is superseded, the tool and the References list are updated.
Educational
This is a teaching resource, not a clinical protocol. It does not replace judgment, supervision, pharmacy verification, specialist input, or your institution’s policies.

On sources & safety

Clinical decision instruments referenced in the tools (for example, HEART, Wells/PERC, Alvarado, and the Ottawa SAH rule) are published, peer-reviewed rules cited to their original literature — see the References page for the complete list, each tied to its derivation study. Documentation and coding standards differ by country, payer, and institution and change over time — always confirm against your own current local guidance.

Permissions & corrections

For licensing, reuse, partnership inquiries, or to report a correction, contact the author, Kim Trinh, MD, in writing. Corrections to clinical content are taken seriously and prioritized at the next review.

Copyright & use

© 2026 Kim Trinh, MD. All rights reserved. The writing, code, design, and tools on this site are the original work of Kim Trinh, MD and are protected by copyright. You’re welcome to read and use the site for your own personal education, but the content and code may not be copied, reproduced, republished, modified, or redistributed — in whole or in part — without prior written permission. Referenced clinical decision instruments remain the work of their respective authors.

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Not medical advice. ER Toolkit is for education only and is not affiliated with any health system, payer, or regulatory body. Use of the site does not create a clinician–patient or advisory relationship.