# Codebook: FDA reports about wheelchair cushions and flotation cushions (product codes IMP and KIC)

Written before any report in the set was coded. Mobility Atlas study, October 2026.

## Pool
Every FDA MAUDE device report filed under product code IMP ("Cushion, Wheelchair", 21 CFR 890.3920) or KIC ("Cushion, Flotation", 21 CFR 890.3175) in openFDA, read on 11 October 2026: 313 reports, 308 with text. All 308 are in the pool. Reports filed under these codes are sometimes about other products (a bed overlay, a commode chair, a leg rest); the DEVICE field and the N code sort those out.

## What you record for each report
One line per report: `report_key,device,category,injury,skin,fall,finding,note`

### DEVICE (one letter), from the report text; the brand line may be used only when the text does not say
- W: a cushion used on a WHEELCHAIR seat or back (air cell, foam, gel, hybrid; ROHO, Jay, Vicair and similar, when the report says or the context makes clear it was on a wheelchair).
- B: a support surface or cushion that is NOT a wheelchair seat: a bed, mattress, overlay, operating-table or positioning pad, heel or limb protector, recliner or stretcher pad.
- C: a seat cushion where the report does not say what it was used on (only "cushion", "seat cushion").
- O: a different device altogether (a wheelchair part other than a cushion, a commode or shower chair, a lift, any other product).

### CATEGORY (one letter): what the report says went wrong. Precedence: the FIRST letter that applies wins.
1. F: FIRE, heat, melting or smoke from the cushion, or the cushion said to be flammable.
2. A: AIR or inflation: leak, puncture, hole, valve or inflation-tool problem, deflated, over- or under-inflated, bottoming out because air was lost, sensor or set-up tool problem.
3. M: MATERIAL or structure: foam or gel broke down, gel leaked, cover tore, seam split, zipper failed, base cracked, cushion wore out or arrived damaged.
4. S: SLIPPING or position: the cushion slid or moved, the user slid off or fell because of the cushion, cushion fitted the wrong way round, wrong size for the chair.
5. R: REACTION or contamination: allergy, rash or skin reaction to the material, chemical smell with symptoms, mould, infection or soiling blamed on the cushion.
6. P: PRESSURE INJURY or skin breakdown alleged against the cushion with no failed part or mechanism from 1-5 named (the cushion "did not work", a sore developed while using it).
7. X: an event with no cushion problem stated (for example a fall from a chair, a report about another part, a death with no device problem alleged).
8. U: a cushion problem is alleged but you cannot tell which kind.
- N: no event or problem involving any device is described (blank, administrative only), or DEVICE is O and nothing involving a cushion happened. Leave the flags n.

### FLAGS (y or n)
- injury: the report states harm to the body or medical care (sore, ulcer, wound, rash, burn, fracture, infection, hospital, surgery, death). An impact alone is n.
- skin: the report states a pressure injury, pressure ulcer or sore, decubitus, skin breakdown, blister or wound on the skin of the seat, buttocks, hips, sacrum, coccyx, heels or legs.
- fall: the user fell, slid off the seat to the floor, or the chair tipped.

### FINDING (one letter): what the maker or evaluator found, as the report states it
- D: a defect or failure was found or confirmed.
- N: no defect found, could not duplicate, or the cushion was found working as designed or misused.
- X: not evaluated, not returned, or nothing stated.

### note
At most 15 words: the cushion type or brand, the part, what made the choice hard. No quotes longer than 6 words. No personal details.

## Output format
CSV with header `report_key,device,category,injury,skin,fall,finding,note`, one row per report in your chunk, nothing else. Every report gets exactly one row.