The blood backflow preventive disposable infusion set had passed through experimentations for several thousand times with modifications; The researchers had broken through all difficulties in techniques, materials and functional tests as well as through repeated clinical trials in application, finally such a blood backflow preventive, economical and safe disposable infusion set is produced. It has successfully obtained patent in China(Chinese patent number: ZL01271433. X). This certainly is another revolutionary breakthrough in disposable infusion sets.
Product structure, principle of action and methods of application
The structure of the blood backflow-preventive infusion set is shown in the right figure; The only difference between it and the traditional infusion set merely lies in the presence of a pressure gas balloon and buoyant plug in the Murphy's tube. Procedures of puncture, air inlet, air expelling, fluid conveyance and speed regulation in the entire operation course of the blood backflow-preventive infusion set are similar to that practiced in the ordinary disposable infusion set.
During infusion, when the fluid has entered into the Murphy's tube, with the buoyant plug up the fluid will flow through the infusion tube; When the fluid nearly flows to the end, the buoyant plug will fall down to have the outlet of the Murphy's tube completely blocked. Thus the space between the outlet of the Murphy's tube to its outlet will be filled with the fluid, and the fluid pressure in this pressure in this section of the tube will be higher then the venous blood pressure so as to stop the blood in the vessel to flow back.
When the fluid is to be changed, normal procedures are similar to that practiced with the traditional set.
If the buoyant plug does not float up, you can press the pressure gas balloon unit it floats up.
Clinical significance
I. Avoidance of various types of harms and panics brought to the patient by blood backflow with benefits to the health and rehabilitation to the patient;
II. Diminishment to the amount of work and working pressure to the nursing staffs, lowering conflicts between patient and medical professionals, thus diminishing risks to the nursing staff;
III. Expressing fully a new integrated nursing idea, while providing therapeutic nursing, patient's panics and nervousness are diminished; Thus creating the action of psychological nursing with corresponding elevation of nursing quality;
IV. Environment-friendly: Diminishing chances of spread of diseases by diminishing volume of medical rubbish polluted by blood.
Clinical application of disposable infusion set has been popularized; Plastic-tube infusion set repeated used in early days has been advanced to disposable infusion set thus having probability of hospital infection greatly diminished, this is certainly a revolution in clinical infusion set.
Infusion is carried out by using traditional disposable infusion set, if the infusion needle is not with drawn promptly or the infusion fluid is not changed in time, when the fluid falls below the Murphy's tube to a certain extent, the intravenous pressure will be higher than the fluid pressure, then the blood will flow back from the blood from the blood vessel into the tube.
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