A comparison test on the number of puncture coring is conducted using the normal needle and the Huber needle in the injection area of the implantable drug-supplying device separately. The result indicates that the number of coring using the Huber needle is much less than that using the normal needle during the puncturing. So it is suggested to popularize the Huber needle in the drug transfusion of the implantable drug-supplying device.
Infusion Pumps, Implantable ; classification ; Needles

Today, the pharmaceutical departments of hospitals have still manufactured intravenous solution by backward equipments to use in hospital including the central hospitals. Therefore, the problem that using and supply the solutions, is anxiety of many person include health staffs and patients in areas when used such self supplied products.
Solutions ; Infusion Pumps

Carried on the exploration testing of flow rate of infusion device about industry standard YY 0451-2010. Engaged in flow rate experiments adopting different method that are provided by new and old industry standard for samples of the same type. Compared with the result of the dangerous coefficient by calculating the test data, the old standard can be more sensitive to reflect the situation of product flow rate, so it can be applied to conventional control of the products. The method which provided by the new industry standard is suitable for evaluating periodicity the level of product contaminated.
Flowmeters ; Infusion Pumps

OBJECTIVE: Analyze and conclude the new quality control process, so as to improve the quality control efficiency. METHODS: Statistical analysis was conducted on the flow rate quality control data of infusion pump in 2020, with a total of 330 times of quality control data. RESULTS: The pump with qualified flow rate entered and maintained the qualified state from the third minute, while the pump with unqualified flow rate entered and maintained the unqualified state from the second minute. CONCLUSIONS Take the third minute to enter the qualified range and continue for 2 minutes to judge that the flow rate quality control is qualified. The accuracy of this new rule is as high as 100%, and the time of flow rate quality control can be reduced from 60 minutes to 10 minutes, which greatly improves the work efficiency.
Infusion Pumps ; Quality Control

With a microsystem or micropump, the release rate of drug delivery is able to be controlled easily to maintain the therapeutic efficacy. A piezoelectric membrane-valve micropump for implantable and carryhome drug delivery system is developed and tested. The influence elements of dynamic performance of the PZT actuator and valve were analyzed, and the calculation method of resonant frequency of the membrane valve was provided. Study results showed that the output performance of the micropump depended on the coupling effect of the actuator and valve. For a given actuator, the output value and the optimal frequency of a micropump could be enhanced only by valve design. Two micropumps with different valve dimensions were fabricated for comparing examination. The smaller -valve micropump obtained higher output values (the maximum flow rate and backpressure being 3.5 ml/min and 27 KPa, respectively) and two optimal frequencies (800 Hz and 3 000 Hz). The larger -valve micropump achieved lower output values (the maximum flow rate and backpressure being 3.0 ml/min and 9 KPa, respectively) and one optimal frequency (about 200 Hz). The test results suggest that the output values and optimal frequency of micropump can be improved by changing the valve dimension, and the viewpoint that checkvalve micropump works only with low acting frequency is wrong.
Drug Delivery Systems ; instrumentation ; Equipment Design ; Humans ; Infusion Pumps, Implantable ; Micro-Electrical-Mechanical Systems ; instrumentation

This paper proposes a one-way micro valve with a simple structure and a simulation design for the engineering capsule. We have now got its design parameter selection method and its mechanic characteristic from experiments.
Capsules ; Computer Simulation ; Drug Delivery Systems ; methods ; Equipment Design ; Infusion Pumps, Implantable ; Technology, Pharmaceutical ; instrumentation ; methods

To evaluate the influence of different brands of syringes on performance parameters and application quality of syringe pump, we carried out matching experiment of infusion/syringe pump analyzer Rigel Multi-Flo, made by ALK Co. in Sweden, for 3 different types of syringes to measure the flow rate, occlusion alarm pressure, occlusion time and bolus volume of 26 syringe pumps. Data of quality control were analyzed with statistical method. The results demonstrated that there were significant differences in the flow rate, occlusion alarm pressure, occlusion time and bolus volume (P<0. 01) between those of common syringes and original syringes. This study points out that the health care providers should select compatible syringes for syringe pumps, which provides evidence and guidance to assure the reasonable and safe application of syringe pumps in clinical practice.
Infusion Pumps ; Quality Control ; Syringes

PURPOSE: The purpose of the study was to evaluate the feasibility of infusion of normal saline onto the surface of the liver capsule for minimizing thermal injury of the adjacent organs during radiofrequency ablation of subcapsular hepatic tumor in an ex-vivo porcine model. MATERIALS AND METHODS: We used porcine small bowel with it's serosal surface spread onto the porcine liver as an experiment model. The puncturing electrode was inserted into a 6 Fr introducer sheath, and the introducer sheath was connected to the infusion pump for creating a saline flow over the liver surface . A total of 15 ablations were divided into the control group (n=5), intermittent saline infusion group (n=5) and continuous saline infusion (n=5) group. The ablations were done during 3 minutes, and the infusion was set at 2 ml/min and stopped every 30 seconds in the intermittent saline infusion group. After the ablation, we measured the size of the ablated lesion on the surface of bowel and liver, and we also measured the depth of hepatic lesion. RESULTS: Ablated areas of bowel and liver surface in the control group, intermittent saline infusion group and continuous infusion group were 210.7+/-89.1 mm2, 74.6+/-27.2 mm2 and 35.8+/-43.4 mm2, respectively, and 312.6+/-73.6 mm2, 228.4+/-110.5 mm2, and 80.9+/-55.1 mm2, respectively. In contrast to the broad base of the ablated area on the surface of the liver in the control group, the shapes of the lesions became narrower approaching to the liver surface in all cases of the continuous saline infusion group, and the shapes of the lesions were broad based in 3 cases and narrow based in 2 cases of the intermittent saline infusion group. CONCLUSION: Continuous infusion of normal saline onto the surface of the liver during radiofrequency ablation of subcapsular hepatic tumor is a feasible method for minimizing thermal injury of the adjacent organs. Further exploration of the optimal parameters or techniques to maximize the hepatic ablation and simultaneously to minimize the thermal injury of adjacent organs is required.
Catheter Ablation* ; Electrodes ; Infusion Pumps ; Liver*

BACKGROUND: In dental intravenous sedation, continuous intravenous infusion of a low-dose drug requires an infusion pump such as a syringe pump. To develop a new syringe pump for clinical use, the functions of the pump must meet certain international standards. Various safety and efficacy tests must be performed on the syringe pump, as stipulated by these standards, and an approval must be received from the approving agency based on such test results. METHODS: The authors of the present study developed a novel syringe pump and performed efficacy evaluation by testing its infusion speed at 1 and 25 ml/h, and infusion performance testing at 2 and 24 h. Moreover, performance evaluation was conducted by comparing the novel pump to an existing pump with the infusion speed varied from 1 to 5 ml/h. RESULTS: In the efficacy testing on the newly developed syringe pump, infusion with the infusion speed initially set to 1 ml/h resulted in infusion speeds of 1.00 and 0.99 ml/h in the 2- and 24-h assessment, respectively. Changing the infusion speed setting to 25 ml/h resulted in an infusion speed of 25.09 and 23.92 ml/h in the 2- and 24-h assessment, respectively. These results show no significant differences when compared with other commercially available pumps. CONCLUSIONS: The efficacy testing of the newly developed syringe pump showed the accuracy to be within tolerance. Based on these findings, we believe that the newly developed syringe pump is suitable for clinical use.
Data Accuracy ; Infusion Pumps ; Infusions, Intravenous ; Syringes*

BACKGROUND: Many infusion devices have been used in anesthetic practice, some of them are balloon type infusor consisted of rubber or silicone materials. This study was done on the basis of that the flow rate will vary according to the volume of balloon type infusor because the shape and elasticity of the balloon is changed. METHODS: We examed infusor-A consisted of silicone (n=15) and Infusor-B consisted of rubber (n=15). Each model was 2 ml/h, total volume 100 ml type. The infusor was filled with normal saline 100 ml and the inside pressure of the infusor was measured according to the reservoir volume change. Infusion rate was calculated by dividing the infused volume by infused time. The infused volume was measured by the weight reduction of the reservoir. RESULTS: The monitored inside pressure of the reservoir was divided into 3 ranges; the range of the pressure decreasing (100-85 ml), maintaining (85-8 ml), and increasing (8-0 ml) with the infusor volume. The flow rate varied with the infusor volume; in the large (100-85 ml) and small (8-0 ml) infusor volume, the infusion rate was higher than other volume range (85-8 ml). CONCLUSIONS: In the balloon type infusor, the inside pressure of the balloon reservoir was not sustained evenly in the total reservoir volume range. But the infusion rate was parallel with the inside pressure of the reservoir and influenced by the reservoir volume. This may be owing to the change of the elasticity and tensile force of the reservoir according to the time and volume.
Elasticity ; Infusion Pumps* ; Rubber ; Silicones ; Weight Loss