DE? abbreviation in heart catheterisation DLD

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A heart catheterisation report gives the following details/parameters:

Gewicht: 81 kg Größe: cm BSA; m2

Hb: mmol Quick: %- Blutgruppe:

DLD:4,19 min DFP: 34,5 Gy*cm2 Kontrastmittel: 130 ml Imeron

Punktion: re.Art. fem. Verschlusssystem: Angio-Seal 6F VIP

Komplikationen: keine

Any idea what DLD might be? I guessed something with 'Dauer' or

'duration' given the 4.19 mins. but nothing confirms this. Could be

English or German of course (BSA = body surface area (EN); DFP =

Dosisflächenprodukt (DE) = dose area product)

MTIA

Margaret