A gauze is suitable for being placed around a wound of a patient and is sleeved on a surgical instrument. The surgical instrument comprises a tube inserted into the wound of the patient and a plate provided with the tube. The gauze comprises a cloth body suitable for being placed around the wound of the patient.The cloth body includes a side edge and forms a hole adjacent to the center of the cloth body, and a long notch extending from the side edge to the hole.Move the cloth towards the tube body of the surgical instrument and make the tube body of the surgical instrument pass through the long gap until it is limited in the hole, so that the cloth body is sleeved on the tube body of the surgical instrument.One of the surfaces of the cloth forms two hardened layers which are located on the opposite sides of the two long notches and extend from the side to the center of the cloth.一種紗布，適用於放置在一患者之傷口周圍且套設於一手術器械，該手術器械包含一插設於該患者之傷口的管體以及一套設該管體的板體，該紗布包含一適用於放置在該患者之傷口周圍的布體。該布體包括一側邊且形成一鄰近該布體中央的孔洞，以及一自該側邊延伸至該孔洞的長形缺口。將該布體朝向該手術器械之管體移動而使該手術器械之管體通過該長形缺口直到限位在該孔洞中，以使該布體套設於該手術器械之管體。其中，該布體的其中之一表面形成有兩分別位於該長形缺口兩相反側且自該側邊朝該布體之中央延伸的硬化層。
