A remaining needle infusion solution prompting device and sensing system

Abstract

The application belongs to the field of medical devices, and particularly relates to a remaining needle exudation prompting device and a sensing system. The remaining needle exudation prompting device comprises a fixing belt, a wrist belt and a sensing assembly. The fixing belt is detachably connected with each of the two wrist belts at both sides, and the tail ends of the two wrist belts are connected by the sensing assembly. The device detects whether the remaining needle infusion of a patient is swollen to determine the exudation condition of the infusion, and can alarm and prompt in the first time, thereby reducing the workload of medical staff. In addition, the application also provides a stretching sensing system based on the remaining needle exudation prompting device. The stretching sensing system generates resistance change through stretching of conductive gel, sets the shortest response time threshold and the minimum response strain threshold of the conductive gel, and simultaneously exceeds the shortest response time threshold and the minimum response strain threshold, so that the alarm device alarms. The exudation prompting alarm accuracy is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of medical devices, in particular to a remaining needle exudation prompting device and a sensing system. BACKGROUND

[0002] The intravenous remaining needle is also called intravenous cannula needle. Its use can reduce the pain and fear of injection caused by repeated intravenous puncture of patients, and can alleviate their anxiety. The intravenous remaining needle is widely used in clinic because of its simple operation, convenience, long intravenous indwelling time, protection of blood vessels, timely infusion treatment, and reduction of the workload of nurses.

[0003] Infusion exosmosis is very common in clinic. It is generally believed that the liquid exosmosis is caused by the fact that the operator punctures the blood vessel wall or the inclined surface of the needle is not completely inserted into the blood vessel during puncture. It can also be caused by non-puncture injury of the blood vessel, destruction of the endothelial integrity of the blood vessel wall, and exosmosis of the liquid to the deep tissue at the weak part of the blood vessel wall, thereby causing the liquid exosmosis. As a result, the patient's exosmosis site swells, the muscle spasms, and the pain is unbearable. After this situation occurs, the nursing staff should immediately stop the infusion, pull out the infusion catheter, cover it with a dressing, elevate the affected limb, immobilize it, and change the infusion site.

[0004] At present, the main reason for the infusion exosmosis of the remaining needle is that after the patient's intravenous remaining needle is successfully punctured, the patient excessively moves, excessively bends and pulls the hands on the bed due to muscle spasm, discomfort and other reasons. The remaining needle catheter excessively rubs against the vein, and even folds, which causes the destruction of the endothelial integrity of the blood vessel wall and causes exosmosis. This situation can only be avoided by timely observation of the patient or medical staff and rapid measures. However, this method is time-consuming and labor-intensive, and medical staff cannot simultaneously take care of every patient. In addition, the swelling of the infusion site is not obvious in the early stage of infusion exosmosis, and the fixed bandage and other auxiliary fixing devices of the remaining needle block the view, so it is difficult for medical staff to detect it with the naked eye. Therefore, this phenomenon has become a problem to be solved in clinic.

[0005] Therefore, it is necessary to find a remaining needle auxiliary device with alarm prompting function to automatically remind medical staff at the first time of infusion exosmosis and prevent more serious iatrogenic injury.

[0006] Reference: Li Chenglian, Causes and Prevention and Treatment Measures of Intravenous Infusion Exosmosis, China Practical Medicine, 2011.3.6. SUMMARY

[0007] In order to solve the above technical problems, the present application provides a remaining needle exudation prompting device. The device detects whether the infusion site of the patient's remaining needle is swollen to determine the infusion exosmosis situation, and can alarm and prompt at the first time, thereby reducing the workload of medical staff.

[0008] The technical scheme of the present application is as follows:

[0009] A remaining needle exudation prompting device, comprising a fixing band, a wrist band and a sensing assembly;

[0010] The fixing band is detachably connected with each of the two wrist bands at both sides, and the tail ends of the two wrist bands are connected by the sensing assembly.

[0011] Further, the sensing assembly comprises a shell, a conductive gel, a main board, an alarm and a battery.

[0012] The shell bears the conductive gel, the main board, the alarm and the battery are fixedly arranged in the shell, and the shell is provided with through grooves on both sides which are adapted to the wrist bands; the two wrist bands are arranged through the through grooves and connected by the conductive gel in the middle of the shell; and the battery, the main board, the conductive gel and the alarm are electrically connected.

[0013] Further, the fixing band is made of transparent material and is inelastic in the longitudinal direction, the inner side of the fixing band is provided with a concave structure which is adapted to the curvature of the wrist / arm, and the first binding band openings are arranged on both sides of the fixing band, and the remaining needle slot is further arranged on the front surface of the fixing band; further, the wrist band comprises an arc-shaped band and a binding band, a strip-shaped hole is arranged at one end of the arc-shaped band, a second binding band opening is arranged on the back surface of the arc-shaped band and penetrates the strip-shaped hole, a pivot limiting plate is fixedly arranged on the upper part of the strip-shaped hole, one end of the binding band is fixedly connected to the middle part of the arc-shaped band, and the other end of the binding band is arranged through the first binding band opening, the strip-shaped hole and the second binding band opening in sequence, and the pivot limiting plate is rotated to fix the binding band.

[0014] Further, the arc-shaped band is made of hard plastic material and is adapted to the curvature of the side surface of the wrist / arm, and the binding band is made of inelastic soft material.

[0015] Further, the conductive gel comprises but is not limited to a high polymer material mixed with conductive material, preferably, the conductive gel is a polyacrylic hydrogel, and more preferably, the conductive gel is a polyacrylic hydrogel mixed with iron ions.

[0016] It is explained that, because the inventor wants to timely alarm and remind medical staff in the early stage of remaining needle exudation, the sensitivity of the stretch sensing system is required to be high, the existing tension sensor cannot achieve this effect or is not suitable for consumables due to high cost, and the alarm in the late stage of serious exudation is meaningless, therefore, the present application uses the conductive gel as a flexible sensor to detect whether the remaining needle is exudated and swollen, and triggers the alarm buzzer or flashing through the relative resistance change of the conductive gel, but the relative resistance change of the conductive gel is related to the stretch state of the conductive gel, and the conductive gel is easily squeezed or stretched in the early stage of wearing, which causes the resistance change, therefore, the present application uses the following stretch sensing system to control and avoid false alarm, as follows:

[0017] The application provides a stretch sensing system, which generates resistance change through stretch of conductive gel, collects resistance change data and response time of the conductive gel to reflect strain rate of the conductive gel.

[0018] The strain rate of the conductive gel is calculated through a fitting equation of a resistance-strain standard curve of the conductive gel.

[0019] Further, the stretch sensing system sets a shortest response time threshold and a minimum response strain threshold of the conductive gel, and the alarm is triggered when the thresholds are exceeded.

[0020] The application has the following beneficial effects:

[0021] 1. The indwelling needle infusion prompt device has simple structure and good practicability.

[0022] 2. The application ensures the accuracy of the infusion alarm through two aspects. Firstly, the arc-shaped belt made of hard plastic material and the belt made of inelastic soft material are arranged, and one end of the belt is fixedly connected to the middle of the arc-shaped belt, and the other end is sequentially arranged through the first belt port, the strip-shaped hole and the second belt port. This structure perfectly avoids the influence of the bottom conductive gel when the indwelling needle infusion prompt device is installed on the patient's hand. Secondly, the shortest response time threshold and the minimum response strain threshold of the conductive gel are set to avoid false alarm caused by patient activity.

[0023] 3. The application makes full use of the super-sensitive characteristics of the conductive gel, and solves the false alarm problem caused by the super-sensitivity through system setting and physical structure. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings constituting a part of the specification of the application are used to provide further understanding of the application, and the schematic embodiments of the application and the description thereof are used to explain the application, and do not constitute improper limitation on the application.

[0025] Figure 1 It is a perspective view of the indwelling needle infusion prompt device of the application.

[0026] Figure 2 It is a front view of the indwelling needle infusion prompt device of the application.

[0027] Figure 3 It is a bottom perspective view (internal sensing assembly) of the indwelling needle infusion prompt device of the application.

[0028] Figure 4 It is a relative resistance-strain standard curve of the stretch sensing system of the embodiment 1 of the application.

[0029] Figure 5 A relative resistance-response time resistance change of a stretch sensing system of embodiment 1 of the present application.

[0030] In the figure, 1 is a fixed band, 2 is a wrist band, 3 is a sensing assembly, 101 is a first binding band opening, 102 is a retention needle slot opening, 103 is an observation opening, 201 is an arc-shaped band, 202 is a binding band, 203 is a pivot limiting plate, 204 is a second binding band opening, 205 is a strip-shaped hole, 301 is a conductive gel, 302 is a battery, 303 is a main board, 304 is an alarm, and 4 is an inclined surface. DETAILED DESCRIPTION

[0031] The present application will be described below through specific embodiments.

[0032] Embodiment 1

[0033] A retention needle exudate prompting device includes a fixed band 1, a wrist band 2, and a sensing assembly 3. The fixed band 1 is detachably connected with each of the two wrist bands 2 at both sides, and the tail ends of the two wrist bands 2 are connected by a conductive gel 301 in the sensing assembly 3. The sensing assembly 3 includes a shell that carries the conductive gel 301, a main board 303, an alarm 304, and a battery 302. The shell is provided with through holes at both sides, and the two wrist bands 2 pass through the through holes to be fixedly connected with the conductive gel 301 through copper contacts. The battery 302, the main board 303, the conductive gel 301, and the alarm 304 of the sensing assembly 3 are electrically connected. The conductive gel 301 is deformed by the force applied by the wrist band 2, the main board 303 collects the resistance change of the conductive gel 301, processes information, judges the resistance and response time, and triggers the alarm 304 to beep if the conditions are met.

[0034] The fixed band 1 is made of transparent material and is provided with a planar observation opening 103 in the middle. The arc-shaped fixed band 1 is twisted to cause misjudgment of the exudation condition at the patient's retention needle site. The fixed band 1 has no elasticity in the longitudinal direction to ensure the sensitivity of force transmission. The inner side of the fixed band 1 is a concave structure that matches the curvature of the wrist / arm, and the two sides are provided with first binding band openings 101. Generally, when the patient wears the device, only one wrist band 2 is detached from the fixed band 1, that is, the position of the fixed band 1 is determined by the wrist band 2 passing through the first binding band opening 101 before other tightening operations are performed.

[0035] The edges of the fixed band 1 are provided with inclined surfaces 4. The inclined surfaces 4 are used to guide the arc-shaped band 201 to slide onto the upper surface of the fixed band 1 when the arc-shaped band 201 is tightened, thereby avoiding the condition of excessive tightening to stretch the conductive gel 301.

[0036] The wrist strap 2 comprises an arc-shaped band 201 and a binding band 202, the arc-shaped band 201 is made of hard plastic material, which guarantees the sensitivity of force transmission, and the structure is adapted to the curvature of the wrist / arm side; the binding band 202 is made of soft material without elasticity, and the same, which guarantees the sensitivity of force transmission, and the soft material of the binding band 202 guarantees the realization of the binding function.

[0037] The arc-shaped band 201 is provided with a strip-shaped hole 205 at one end, and a second binding band opening 204 is arranged on the back of the arc-shaped band 201 and penetrates the strip-shaped hole 205, a pivot limiting plate 203 is fixedly arranged on the upper part of the strip-shaped hole 205, and the binding band 202 is fixedly connected to the middle part of the arc-shaped band 201 at one end and is sequentially provided with a first binding band opening 101, a strip-shaped hole 205 and a second binding band opening 204 at the other end, the penetrating structure guarantees the stability of the connection between the binding band 202 and the fixed band 1 and the arc-shaped band 201, when binding, the binding band 202 pulls the arc-shaped band 201 to form a force fitting trend inward, which improves the sensitivity of the sensing assembly 3, and the pivot limiting plate 203 rotates to realize the fixed locking of the binding band 202, which is convenient and practical.

[0038] The conductive gel 301 used in the present application is a polyacrylic acid hydrogel doped with iron ions, and the specific preparation steps are as follows:

[0039] 10ml of acrylic acid monomer is added to water, 0.5g of KPS initiator is added, 20ml of water is added, and 1mg of Fe 3+ is added, 60℃ stirring and heating, polymerization is initiated, poured into a strip-shaped mold, cooled, dried at 50℃ for 8h, cut into 1cm*0.5cm*0.1cm, and the conductive gel 301 is obtained.

[0040] A stretch sensing system generates resistance changes by stretching the conductive gel 301, collects resistance change data and response time of the conductive gel 301 to reflect the strain rate of the conductive gel 301, as shown in the drawing, the sensitivity of the conductive gel 301 is high, the strain rate of the conductive gel 301 is calculated according to the fitting equation of the resistance-strain standard curve of the conductive gel 301, and the strain rate change corresponds to the response time, and the condition triggers an alarm. Figure 1

[0041] The stretch sensing system sets the shortest response time threshold (2.5s) and the minimum response strain threshold (5%) of the conductive gel 301, and simultaneously exceeds the shortest response time threshold and the minimum response strain threshold, the alarm 304 alarms.

[0042] It should be noted that according to different conductive gels 301, the fitting equation of the resistance-strain standard curve is different, and the shortest response time threshold and the minimum response strain threshold are also different, and the minimum response strain threshold should be calculated according to the average height difference of skin exudation swelling. ​

[0043] As Figure 2 shown, the interval 1s touch wristband 2, wristband 2 with conductive gel 301 deformation (> 5%), observe the relative resistance-response time curve, not at the same time more than the minimum response time threshold, alarm 304 alarm.

[0044] Working principle: one end of a retention needle solution prompt device wristband 2 from the fixed band 1 off, wearing to the patient retention needle, make the retention needle slot 102 align the retention needle position, the bandage 202 in turn set first bandage mouth 101, strip hole 205 and second bandage mouth 204, and then rotate the shaft limiting plate 203 to the bandage 202 fixed locking, adjust the two sides of the bandage 202 tightness, open the power supply of the lower sensor assembly 3, at this time, touch or 2.5s within the stretch behavior no alarm prompt, if the appearance of the solution, the conductive gel 301 strain 5% within 2.5s, then trigger the alarm 304 alarm, remind medical staff.

Claims

1. A remaining needle infusion prompting device, characterized in that, It comprises a fixing band, a wrist band and a sensing assembly; The fixing band is detachably connected with each of the two wrist bands at two sides, and the tail ends of the two wrist bands are connected by the sensing assembly; The fixing band is made of transparent material and is inelastic in the longitudinal direction, the inner side of the fixing band is concave to adapt to the curvature of the wrist / arm, and the first binding band opening is arranged at the two sides, and a needle slot is further arranged on the front surface of the fixing band; The wrist band comprises an arc-shaped band and a binding band, a strip-shaped hole is formed at one end of the arc-shaped band, a second binding band opening is arranged on the back surface of the arc-shaped band and penetrates the strip-shaped hole, a pivot limiting plate is fixedly arranged on the upper part of the strip-shaped hole, one end of the binding band is fixedly connected to the middle part of the arc-shaped band, and the other end of the binding band is sequentially arranged through the first binding band opening, the strip-shaped hole and the second binding band opening, and the pivot limiting plate is rotated to fix the binding band; when the binding band is tightened, the binding band pulls the arc-shaped band to form a stress tendency of being buckled inward, thereby improving the sensitivity of the sensing assembly, and the pivot limiting plate is rotated to fix and lock the binding band; The arc-shaped band is made of hard plastic material, and the structure of the arc-shaped band is adapted to the curvature of the side surface of the wrist / arm; the binding band is made of inelastic soft material; and the edges of the two sides of the fixing band are provided with inclined surfaces, the inclined surfaces are used to guide the arc-shaped band to slide to the upper surface of the fixing band when the arc-shaped band is tightened, so that the condition of over-tightening and stretching of the conductive gel is avoided; The sensing assembly comprises a shell, a conductive gel, a main board, an alarm and a battery; The shell bears the conductive gel, the main board, the alarm and the battery are fixedly arranged in the shell, and the through grooves adapted to the wrist bands are arranged on the two sides of the shell; the two wrist bands are arranged through the through grooves and connected with the conductive gel in the middle part of the shell; and the battery, the main board, the conductive gel and the alarm are electrically connected; The conductive gel is deformed under the force applied by the wrist band, the main board collects the resistance change of the conductive gel, processes information, judges the resistance and response time, and triggers the alarm buzzer when the conditions are met; The conductive gel is a polyacrylic hydrogel doped with iron ions.

2. The indwelling needle infusion prompting device according to claim 1, wherein The conductive gel is a high polymer material doped with conductive material.

3. A tensile sensing system based on a needle-in-dwelling infusion prompting device, characterized in that The stretching sensing system generates resistance change by stretching the conductive gel, collects resistance change data and response time of the conductive gel to reflect the strain rate of the conductive gel; The strain rate of the conductive gel is calculated by the fitting equation of the resistance-strain standard curve of the conductive gel.

4. The stretch sensing system based on the indwelling needle infusion prompting device according to claim 3, characterized in that, The stretching sensing system sets the shortest response time threshold and the minimum response strain threshold of the conductive gel, and the alarm alarms when the shortest response time threshold and the minimum response strain threshold are exceeded.

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