שאלה משלב א׳ בכירורגיה אורולוגית · מועד 2022, שאלה 132

Correct: B (per the official answer key) — negative-pressure wound therapy improves blood flow to the tissue. The first half of the statement is the physiological basis of the treatment: subatmospheric pressure of about 125 mmHg increases local perfusion, removes exudate and reduces interstitial oedema, approximates the wound edges and stimulates granulation tissue. The second half of the key's option, that it increases the bacterial load, is not what the evidence shows — the balance of studies finds the bacterial burden reduced or unchanged — so the item is best treated as imprecisely drafted. Of the other options, A is wrong because NPWT is widely used in chronic wounds, C is wrong in claiming poor cost-effectiveness, which has in fact been demonstrated in diabetic foot and sternal wounds, and D is wrong because the therapy *reduces* local oedema.

מקור: עמ ' 152עמ ' 141