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    • 42. 发明授权
    • Wearable artificial pancreas
    • 可穿戴人造胰腺
    • US5298022A
    • 1994-03-29
    • US238
    • 1993-01-04
    • Luigi Bernardi
    • Luigi Bernardi
    • A61B5/00A61M31/00
    • A61B5/14865A61B5/14528
    • A device for the continuous quantitative determination of glucose in the blood of a diabetic patient over a period of 24-36 hours, comprises a container for a saline solution with heparin, a microdialyzing needle inserted into a vein of a diabetic patient, a pump for injecting the solution into the microdialyzing needle, a semipermeable hollow fiber membrane located externally of the needle whereby dialysis occurs between the blood and the solution and only glucose and other substances of low molecular weight below 100,000 daltons go through the membrane and the concentration of the glucose and other substances of low molecular weight below 100,000 daltons inside the needle is proportional to that of the external side of the membrane. The needle is provided with an outgoing conduit, the conduit leads to a sensor, which comprises an enzymatic membrane coupled with a Platinum-Silver electrode. The glucose goes into the conduit, oxidation of glucose to gluconic acid and hydrogen peroxide occurs and the hydrogen peroxide is decomposed to give H.sub.2 O and oxygen with the liberation of two electrons whereby electric current is produced and the concentration of glucose in the blood is determined by determining the amount of current produced.It is possible to vary the dilution ratio of the fluid circulating inside the microdialyzing needle by varying the pump speed so that it is possible to have a ratio of the glucose containing saline solution to the actual concentration of glucose in the blood of 1/2-1/20.
    • 用于在24-36小时内连续定量测定糖尿病患者血液中的葡萄糖的装置包括用于肝素盐溶液的容器,插入糖尿病患者静脉的微透析针, 将溶液注入微型脱水针,位于针的外部的半透性中空纤维膜,其中血液和溶液之间发生透析,并且仅葡萄糖和低分子量低于100,000道尔顿的其它物质通过膜并且葡萄糖的浓度 和低于100,000道尔顿内的低分子量的其他物质与膜的外侧成比例。 针设置有输出导管,导管通向传感器,传感器包括与铂 - 银电极耦合的酶膜。 葡萄糖进入导管,葡萄糖氧化成葡萄糖酸,过氧化氢发生,过氧化氢分解,得到H2O和氧,释放出两个电子,由此产生电流,血液中的葡萄糖浓度由 确定产生的电流量。 可以通过改变泵速来改变在微脱水针内循环的流体的稀释比,使得可以使含葡萄糖的盐溶液与血液中葡萄糖的实际浓度的比例为1 / 2- 1/20。
    • 43. 发明授权
    • Wearable artificial pancreas
    • 佩戴人造皮革
    • US5176632A
    • 1993-01-05
    • US527129
    • 1990-05-22
    • Luigi Bernardi
    • Luigi Bernardi
    • A61B5/00
    • A61B5/14865A61B5/14528
    • A device for the continuous quantitative determination of glucose in the blood of a diabetic patient over a period of 24-36 hours, comprises a container for a saline solution with heparin, a microdialyzing needle inserted into a vein of a diabetic patient, a pump for injecting the solution into the microdialyzing needle, a semipermeable hollow fiber membrane located externally of the needle whereby dialysis occurs between the blood and the solution and only glucose and other substances of low molecular weight below 100,000 daltons go through the membrane and the concentration of the glucose and other substances of low molecular weight below 100,000 daltons inside the needle is proportional to that of the external side of the membrane. The needle is provided with an outgoing conduit, the conduit leads to a sensor, which comprises an enzymatic membrane coupled with a Platinum-Silver electrode. The glucose goes into the conduit, oxidation of glucose to gluconic acid and hydrogen peroxide occurs and the hydrogen peroxide is decomposed to give H.sub.2 O and oxygen with the liberation of two electrons whereby electric current is produced and the concentration of glucose in the blood is determined by determining the amount of current produced.