ซื้อDisposable needle No.18x1, Disposable needle No.21x1, Disposable needle No.27x1/2, Endotracheal tube No.5 non cuff, Endotracheal tube No.4 non cuff, Foleys catheter 3-way No.18, Foleys catheter 3-way No.20, Glass syringe for irrigation 50 ml, NG tube No.18 โดยวิธีเฉพาะเจาะจง