POSAS Observer flow
The POSAS aims to measure scar quality metrics, including pigmentation, pliability, thickness, and similarity to adjacent skin architecture. It is also unique in that it combines the patient’s viewpoint of the wound with the observer’s assessment . This calculation scores the observer's viewpoint.
The POSAS Observer Scale contains six items that are scored numerically on a ten-step scale (1-10). Together they make up the ‘Total Score’ of the Observer Scale. Moreover, the observer can also score their ‘Overall Opinion’ but this does not count towards the 'Total Score'.
More information: https://www.posas.org/
The POSAS Observer flow contains the POSAS Observer questionnaire and associated calculation. After form submission, the POSAS Observer calculation is executed automatically. It's easy to extend this flow with conditional logic based on the interpretation of the POSAS Observer calculation.
POSAS Observer questionnaire
Overview of the questionnaire
Overview of the six items/questions that are needed for calculating the total score:
- Surface area
There is one additional question which doesn't need to be taken into account for calculating the total score: the overall opinion of the observer".
 Draaijers LJ, Tempelman FR, Botman YA, Tuinebreijer WE, Middelkoop E, Kreis RW, van Zuijlen PP. The patient and observer scar assessment scale: a reliable and feasible tool for scar evaluation. Plast Reconstr Surg. 2004 Jun;113(7):1960-5; discussion 1966-7. doi: 10.1097/01.prs.0000122207.28773.56. PMID: 15253184.