储存在塑料和玻璃注射器中的血液和水样的氧气泄漏。
Leakage of oxygen from blood and water samples stored in plastic and glass syringes.
作者信息
Scott P V, Horton J N, Mapleson W W
出版信息
Br Med J. 1971 Aug 26;3(5773):512-6. doi: 10.1136/bmj.3.5773.512.
Theory and experiment showed that samples of blood and water stored in 2-ml and 5-ml syringes made of polypropylene, polystyrene, or S.A.N. co-polymer exchanged oxygen with their surroundings. In the first hour the exchange was due mainly to equilibration with the plastic of the syringe and only in small degree to permeation through the plastic. With high initial tension or with blood of low haemoglobin concentration the exchange can result in errors in Po(2) of up to 6% in two minutes and 16% in 30 to 60 minutes. With all-glass syringes the exchange was much slower but, even so, after 24 hours was important in all but a few of 18 interchangeable glass syringes. Therefore unless analysis can be started immediately all-glass syringes are to be preferred, and for prolonged storage even these should be selected.
理论和实验表明，储存在由聚丙烯、聚苯乙烯或苯乙烯-丙烯腈共聚物制成的2毫升和5毫升注射器中的血液和水样会与其周围环境进行氧气交换。在最初的一小时内，这种交换主要是由于与注射器塑料达到平衡，仅有小部分是通过塑料渗透。当初始张力较高或血红蛋白浓度较低的血液进行这种交换时，在两分钟内氧分压（Po₂）误差可达6%，30至60分钟内可达16%。对于全玻璃注射器，交换要慢得多，但即便如此，24小时后，在18个可互换的玻璃注射器中，除少数几个外，其余的交换情况都很显著。因此，除非能立即开始分析，否则应优先选用全玻璃注射器，即使是长期储存，也应选用这类注射器。
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