Vote B J T, Russell M K, Newland A, Polkinghorne P J
Department of Ophthalmology, and Auckland Eye Department, Auckland Hospital, Auckland, New Zealand.
Br J Ophthalmol. 2004 Dec;88(12):1582-4. doi: 10.1136/bjo.2004.045591.
To study the feasibility of humidifying air during vitreoretinal surgery and measure the water content of air before and after intraocular transit.
The absolute water content of air was measured in a series of six eyes undergoing fluid-air exchange during macular hole surgery. Infrared absorption spectroscopy was used to determine the water content of the air infusing and exiting each eye. After baseline measurements for each eye were recorded, a second fluid-air exchange was performed and the effect of humidifying the air infusion was documented. The humidifying device used in this study was a prototype adapted from a commercially available respiratory humidifier and enables humidified air to be delivered at a controlled temperature.
The water content of air increased following intraocular transit, implying dehydration occurs from the intraocular surfaces. For a standard airline infusion the mean increase in water content of air egressing from an eye was 13.4 mg/l. Humidifying the air reduced the rate of water loss by nearly 90%.
Significant water losses can occur from eyes undergoing fluid-air exchange. Humidifying the infused air can substantially reduce the dehydrating effect during an air exchange. This outcome may have a beneficial effect in reducing cataract formation and visual field defects associated with macular hole surgery.
研究玻璃体视网膜手术期间空气加湿的可行性，并测量眼内传输前后空气的含水量。
在一系列6例黄斑裂孔手术中进行液气交换的眼睛中测量空气的绝对含水量。使用红外吸收光谱法测定注入和流出每只眼睛的空气的含水量。在记录每只眼睛的基线测量值后，进行第二次液气交换，并记录空气注入加湿的效果。本研究中使用的加湿装置是一种从市售呼吸加湿器改装而来的原型装置，能够在控制温度下输送加湿空气。
眼内传输后空气的含水量增加，这意味着眼内表面发生脱水。对于标准的空气管路输注，从眼睛流出的空气含水量平均增加13.4毫克/升。空气加湿使水分流失率降低了近90%。
进行液气交换的眼睛会发生大量水分流失。对注入的空气进行加湿可在很大程度上降低空气交换期间的脱水效应。这一结果可能对减少与黄斑裂孔手术相关的白内障形成和视野缺损具有有益作用。
