A drip rate measurable intravenous infusion device
By introducing a fluid equalizer and a measuring tube into the intravenous infusion set, the problems of large measurement errors and complex operation of existing infusion sets have been solved, achieving intuitive and accurate display of infusion rate and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI EAST HOSPITAL EAST HOSPITAL TONGJI UNIV SCHOOL OF MEDICINE
- Filing Date
- 2025-03-20
- Publication Date
- 2026-06-19
AI Technical Summary
Existing intravenous infusion sets have large errors and are complicated to operate when measuring infusion rate. In particular, electronic measuring devices are not suitable for gravity intravenous infusion, and manual measurement methods require a lot of effort and are not simple, making it difficult to meet the needs of a wide range of clinical applications.
Design a drip rate measuring intravenous infusion set, comprising a Mofe's drip tube body, a liquid distributor, and a measuring tube. The liquid distributor is equipped with a main leakage hole and a measuring leakage hole. It can uniformly distribute the liquid and visually display the infusion rate using the scale of the measuring tube, and can be integrated into existing infusion tubing.
It simplifies the counting and conversion steps of infusion rate, presents the infusion rate intuitively, reduces clinical costs, is applicable to various infusion set specifications, and improves the accuracy of measurement and ease of operation.
Smart Images
Figure CN224370355U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an intravenous infusion set, and in particular discloses an intravenous infusion set with a drip rate that can measure the drip rate. Background Technology
[0002] Intravenous infusion is one of the most commonly used treatment methods in medical practice, and it can be divided into gravity intravenous infusion and pressure intravenous infusion. The former is the most commonly used infusion method in clinical practice, which uses the gravity of the fluid and the pressure difference in a vertically suspended infusion line to generate power and achieve a continuous infusion effect.
[0003] In clinical practice, the infusion rate is often limited depending on the patient's condition or the characteristics of the medication. Currently, there are two methods for measuring the infusion rate: electronic and manual. The most commonly used electronic method is the electronic infusion pump, which can regulate the infusion rate, but it is not suitable for gravity-fed infusions, and the maximum syringe capacity is only 50-60 ml. In addition, electronic drip pumps can be used for larger infusion volumes, but they are not widely used in clinical practice and are far from meeting the broad clinical needs.
[0004] The most common clinical method is manual measurement, which involves counting the number of droplets per unit time and calculating the infusion rate. Current infusion tubing typically consists of the infusion tubing, Moffield drip chamber, speed controller, filter, and needle connector. The Moffield drip chamber is the component used to observe the drip rate. While this method is highly practical, the conversion is prone to errors, and different infusion set models have different specifications and droplet capacities. Both the conversion and operation require significant effort, making it inconvenient in practical use.
[0005] Therefore, it is necessary to design a new type of infusion set element that can intuitively display the infusion rate and can be widely used. Summary of the Invention
[0006] The purpose of this invention is to overcome the defects in the existing technology and provide a measurable drip rate intravenous infusion set that is simple in structure, can intuitively display the infusion rate, can be integrated into the existing infusion tubing structure, is more widely used, and can significantly reduce clinical costs.
[0007] This invention is implemented as follows: An intravenous infusion set with measurable drip rate includes a Mofe's drip tube body, a liquid distributor, and a measuring tube. The liquid distributor is fixed above the middle part inside the Mofe's drip tube body. The liquid distributor is generally circular and has 7-15 main leakage holes and 1 measuring leakage hole evenly distributed and of the same shape and size near the edge of the liquid distributor. The upper end of the measuring tube is fixed below the measuring leakage hole. A gap or vent hole is provided between the measuring tube opening and the measuring leakage hole. One side of the measuring tube is fixed to the side wall of the Mofe's drip tube body. A scale is provided on the side wall of the Mofe's drip tube body connected to the measuring tube. The bottom of the measuring tube is located on the side wall of the Mofe's drip tube body and has an outlet hole with a sealing cap.
[0008] The liquid distributor has a concave, arc-shaped center.
[0009] The angle between the line connecting the bottom center of the liquid distributor and any point on the top edge of the liquid distributor and the plane containing the top edge of the liquid distributor is 25-35 degrees.
[0010] The front ends of the main leakage hole and the measuring leakage hole are both semi-circular.
[0011] The width of the measuring leakage hole is 0.1~0.12cm, and the length of the measuring leakage hole is 0.18~0.24cm.
[0012] The liquid distributor is located inside the body of the Mofe's dropper at a height of 1 / 3 from top to bottom.
[0013] The cross-sectional area of the measuring leakage hole is smaller than the area of the measuring tube opening; a drainage tube is provided below the measuring leakage hole, the upper end of the drainage tube is connected to the measuring leakage hole, and the lower end of the drainage tube is located inside the measuring tube and is 1-2 mm lower than the measuring tube opening; a tube wall gap is provided between the outer wall of the drainage tube and the inner wall of the measuring tube.
[0014] The cross-sectional shape of the drainage tube is the same as the shape of the measuring leakage hole.
[0015] The beneficial effects of this utility model are: the liquid is evenly divided into several parts through the main leakage hole and the measuring leakage hole on the liquid distributor, one part of which flows into the measuring tube, so that the measurement result can be obtained by direct observation; it simplifies the operation steps such as counting and conversion, and presents the measurement result intuitively. At the same time, this utility model can be integrated into the existing infusion pipeline structure, which is more versatile than electronic pumps and can significantly reduce clinical costs. Attached Figure Description
[0016] Figure 1This is a schematic diagram of the structure of this utility model.
[0017] Figure 2 This is a top view of the liquid equalizer of this utility model.
[0018] Figure 3 This is a side view of the structure of a utility model liquid distributor.
[0019] Figure 4 This is a schematic diagram of the liquid distributor and measuring tube of this utility model.
[0020] Figure 5 This is a schematic diagram showing the positional relationship between the internal liquid distributor and the measuring tube of this utility model.
[0021] Figure 6 This is a top view of the liquid distributor according to one embodiment of the present invention.
[0022] Figure 7 This is a schematic diagram showing the positional relationship between the liquid distributor, measuring tube, and drainage tube in one embodiment of this utility model.
[0023] The components are: 1. Mofe's dropper body; 2. Liquid distributor; 3. Measuring tube; 4. Main drain hole; 5. Scale; 6. Discharge hole; 7. Sealing cap; 8. Measuring drain hole; 9. Gap; 10. Drainage tube; 11. Tube wall gap. Detailed Implementation
[0024] according to Figures 1-7 This utility model includes a Mofeet dropper body 1, a liquid distributor 2, and a measuring tube 3. The liquid distributor 2 is fixed above the middle part inside the Mofeet dropper body 1, preferably fixed at the top 1 / 3 of the height inside the Mofeet dropper body 1. The liquid distributor 2 is generally circular and plate-shaped, specifically, the middle of the liquid distributor 2 is concave and arc-shaped. The angle α between the line connecting the bottom center of the liquid distributor 2 and any point on the top edge of the liquid distributor 2 and the top edge of the liquid distributor 2 in the plane is 25-35 degrees, preferably 30 degrees.
[0025] The liquid distributor 2 has 7-15 main leakage holes 4 and 1 measuring leakage hole 8, which are uniformly distributed and of the same shape and size, near its perimeter. The front ends of the main leakage holes 4 and the measuring leakage hole 8 are semi-circular. The widths of the main leakage holes 4 and the measuring leakage hole 8 are 0.1-0.12 cm and the lengths of the main leakage holes 4 and the measuring leakage hole 8 are 0.18-0.24 cm, preferably 0.22 cm. The upper end of the measuring tube 3 is fixed below the measuring leakage hole 8. A gap 9 or a vent hole is provided between the measuring tube opening and the measuring leakage hole 8. The gap 9 or vent hole ensures that the negative pressure inside the measuring tube 3 is equal to the negative pressure inside the Mofe's dropper body 1. One side of the measuring tube 3 is fixed to the side wall of the Mofe's dropper body 1. A scale 5 is provided on the side wall of the Mofe's dropper body 1 connected to the measuring tube 3. The bottom of the measuring tube 3 is located on the side wall of the Mofe's dropper body 1 and has an outlet hole 6. A sealing cap 7 is provided on the outlet hole 6.
[0026] Example 1: According to Figure 6 , Figure 7 , combined Figure 1 In this embodiment, there are eight leakage holes 4. The cross-sectional area of the measuring leakage hole 8 is smaller than the area of the opening of the measuring tube 3. A drainage tube 10 is provided below the measuring leakage hole 8. The upper end of the drainage tube 10 is connected to the measuring leakage hole 8, and the lower end of the drainage tube 10 is located inside the measuring tube 3 and is 1-2 mm below the opening of the measuring tube 3. A tube wall gap 11 is provided between the outer wall of the drainage tube 10 and the inner wall of the measuring tube 3. The tube wall gap 11 has the same function as the gap 9 or the vent hole, which is to keep the negative pressure inside the measuring tube 3 the same as the negative pressure inside the Mofe's dropper body 1. The cross-sectional shape of the drainage tube 10 is the same as the shape of the measuring leakage hole 8. The remaining structure is as described above.
[0027] This embodiment can reduce water flow interference caused by the dense main leakage holes 4, and further disrupt the surface tension of the liquid.
[0028] When this utility model is used, the normal liquid level in the main body 1 of the Mofe's dropper is at 1 / 2-2 / 3, and the liquid distributor 2 is located on the upper part of the main body 1 of the Mofe's dropper.
[0029] In a standard Mofee drip infusion, 20 drops of fluid ≈ 1 ml. Traditionally, the infusion rate is 40-120 drops per minute, or 2-6 ml per minute. However, the most commonly used rate is 60 drops per minute, or 3 ml per minute.
[0030] During routine infusion, the measuring tube 3 will be filled with liquid without intervention. Before each measurement, the bottom sealing cap 7 of the measuring tube 3 must be opened to drain the liquid, then the cap should be tightened to begin a new round of measurement. When draining, the speed regulator should be tightened to pause the infusion; however, this is unnecessary during clinical speed adjustments, as the actual liquid loss and measurement error are minimal. Liquid drips from the top of the Mofe's dropper body 1, falling into the central recessed portion of the liquid distributor 1. As the liquid increases and reaches the leakage holes 4, it then falls evenly from each leakage hole 4, with a portion falling into the measuring tube 3. For example, with 15 main leakage holes 4 and 1 measuring leakage hole 8, the liquid in the liquid distributor 2 is divided into 16 equal portions. The volume of liquid within a certain time can be obtained by reading the scale. When the liquid in the Mofe's dropper body 1 exceeds the opening of the measuring leakage hole 8, the measuring tube 3 exceeds the measurement time, liquid overflows, and the measurement fails, returning to normal infusion mode. When re-measurement is required, first turn off the control switch on the infusion tubing, then open the sealing cap 7 to drain the liquid, then tighten it and start a new round of measurement.
[0031] In a preferred embodiment, the liquid distributor 2 is located in the upper middle part of the Moffield dropper body 1, which has a height of 4-5 cm. Therefore, the suitable measuring height of the measuring tube 3 is 1-3 cm. When the measuring height is 3 cm, it can cover a rate of 6 ml per minute, or 120 drops per minute, which can meet most clinical needs.
Claims
1. A drip rate measuring intravenous infusion set, characterized in that: The device includes a Mofee dropper body, a liquid distributor, and a measuring tube. The liquid distributor is fixed above the center of the Mofee dropper body and is generally circular. Around the perimeter of the liquid distributor, near the edge, are 7-15 main leakage holes of the same shape and size, and one measuring leakage hole. The upper end of the measuring tube is fixed below the measuring leakage hole. A gap or vent is provided between the measuring tube opening and the measuring leakage hole. One side of the measuring tube is fixed to the side wall of the Mofee dropper body, and a scale is provided on the side wall of the Mofee dropper body connected to the measuring tube. The bottom of the measuring tube, located on the side wall of the Mofee dropper body, has an outlet hole with a sealing cap.
2. The intravenous infusion set with measurable drip rate according to claim 1, characterized in that: The liquid distributor has a concave, arc-shaped center.
3. The intravenous infusion set with measurable drip rate according to claim 2, characterized in that: The angle between the line connecting the bottom center of the liquid distributor and any point on the top edge of the liquid distributor and the plane containing the top edge of the liquid distributor is 25-35 degrees.
4. The intravenous infusion set with measurable drip rate according to claim 1, characterized in that: The front ends of the main leakage hole and the measuring leakage hole are both semi-circular.
5. The intravenous infusion set with measurable drip rate according to claim 1 or 4, characterized in that: The width of the measuring leakage hole is 0.1~0.12cm, and the length of the measuring leakage hole is 0.18~0.24cm.
6. The intravenous infusion set with measurable drip rate according to claim 1, characterized in that: The liquid distributor is located inside the body of the Mofe's dropper at a height of 1 / 3 from top to bottom.
7. The intravenous infusion set with measurable drip rate according to claim 1, characterized in that: The cross-sectional area of the measuring leakage hole is smaller than the area of the measuring tube opening; a drainage tube is provided below the measuring leakage hole, the upper end of the drainage tube is connected to the measuring leakage hole, and the lower end of the drainage tube is located inside the measuring tube and is 1-2 mm lower than the measuring tube opening; a tube wall gap is provided between the outer wall of the drainage tube and the inner wall of the measuring tube.
8. The intravenous infusion set with measurable drip rate according to claim 7, characterized in that: The cross-sectional shape of the drainage tube is the same as the shape of the measuring leakage hole.