Injection-site rotation planner — Pro tool overview

Summary

Visual body map for injection-site rotation with per-site rest windows, usage counts, and lipohypertrophy-risk flags.

What this tool does

Renders a visual body map of subcutaneous injection sites (abdomen, thigh, upper arm, gluteal). Records logged injections to local storage (no Firestore). Surfaces per-site rest-window status, usage counts, and concentrated-use flags that align with the lipohypertrophy literature.

How the rest-window math works

Per-site rest windows are user-configurable. Usage counts are bounded (200 records per account, malformed and future-dated records dropped). Concentrated-use flags surface when a single site exceeds a configurable usage threshold within the rest window. Lipohypertrophy-risk language tracks the FITTER 2016 international consensus and Famulla 2016 absorption-variability data.

What the tool will not do

It does not diagnose lipohypertrophy. It does not prescribe an injection-technique change. It does not give injection-technique guidance beyond rotation cadence. The body map is anatomically generic; it does not adapt to individual body composition.

Inputs the tool takes

• Logged injection events (site + timestamp)
• Configurable per-site rest window

What the tool returns

• Visual body map with per-site usage counts
• Rest-window status per site
• Concentrated-use flags
• 200-record cap; malformed and future-dated records dropped

Cited literature

• FITTER 2016 international injection-technique consensus
• Famulla 2016 absorption variability from hypertrophic sites (Diabetes Care)

Math in rotationPlannerMath.ts · compliance posture in PRO_TOOLS.md.

See it in action

The injection-site rotation planner is a pepSmart Pro tool. See what Pro includes.