Читать книгу Veterinary Endoscopy for the Small Animal Practitioner - Группа авторов - Страница 29

This is the simplest, easiest, and least cumbersome technique for maintaining irrigation and works well for most diagnostic and many of the basic operative procedures. The technique uses IV fluid bags connected to an intravenous fluid administration set that is then connected to the inflow port in the endoscope sheath. Air is bled from the IV line prior to use to minimize air bubbles that will interfere with the visual field. Intravenous administration sets are available with a filter in the cap on the patient end of the line (Figure 2.18) that allows air to escape but prevents liquid leakage. The fluid bag is hung at an appropriate level above the patient and the intravenous administration set flow controls are opened fully. The stopcock on the telescope sheath is then used to start and stop fluid flow. Fluid pressure and organ distension are controlled by the level the bag is placed above the patient. The rate of fluid flow is controlled by inflow pressure and by egress resistance. A high‐flow low‐pressure system is effective in maintaining a clear visual field.

Figure 2.18 An intravenous fluid administration set with a filter in the cap on its end that allows air to escape but retains fluid. This type of cap facilitates bleeding air out of the line.

(Source: Hespira LifeShield Primary IV Set 12661‐28 and Hespira LifeShield Extension Set 12658‐28.)