CN2790484Y

CN2790484Y - Transfusion automatic alarm device

Info

Publication number: CN2790484Y
Application number: CN 200520068661
Authority: CN
Inventors: 李新庆; 李克敏
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-01-28
Filing date: 2005-01-28
Publication date: 2006-06-28
Anticipated expiration: 2015-01-28

Abstract

The utility model relates to a transfusion automatic alarm device, which comprises a mounting seat (4) for supporting a transfusion bottle (1), wherein a tapered mounting hole which is matched with a tapered section at the lower part of the transfusion bottle (1) is arranged on the mounting seat (4) which is made of elastic materials, notches are arranged at one side of the mounting seat (4), and a slot is arranged on the hole wall of the mounting seat (4). An upper metal foil slice (2) and a lower metal foil slice (6) which are separated are arranged in the slot to form a capacitive sensor, present C-shaped in the slot and are respectively connected with an electronic controller (7) through conducting wires. The utility model has the advantages of simple structure, high sensitivity, good reliability, and convenient installation and maintenance, and can be used for the clinical transfusion of patients in hospital. When the transfusion is about to finish, the alarm device sounds, and simultaneously, a transfusion pipe of a transfusion device can be cut to cause patient to rest with ease, so the itinerant times of nurses is reduced, and transfusion accidents are prevented from happening.

Description

Automatic alarm for transfusion

Technical field

This utility model relates to the patient infusion device that a kind of hospital clinical uses, and specifically, relates to a kind of automatic alarm for transfusion.

Background technology

The infusion set of hospital clinical use at present mostly adopts by artificial supervision transfusion, when the medicinal liquid in the infusion bottle will be totally lost, manually cuts off tube for transfusion by nurse's supervision.Chinese patent CN2618609Y discloses a kind of alarm device of infusing and ending, comprise a calling set, a spring balance that is arranged between transfusion suspension rod and the hanging basket, a slice Magnet is posted in the pointer tip of spring scale, the pan of a steelyard of spring balance is provided with several tongue tubes, the installation site of tongue tube is put correspondingly with the quality indicator bit of infusion bottle on the spring balance pan of a steelyard of different size respectively, and has lead to link to each other between corresponding tongue tube of the specification of infusion bottle and the calling set.When pointer with after tongue tube contacts, circuit is connected, calling set is reported to the police automatically.But mainly there is following deficiency in this device: complex structure, and the measuring accuracy of spring scale is not enough, poor reliability, dynamic response is slow, and needs often to safeguard.Chinese patent CN2060673U discloses a kind of automatic medical infusion alarm, it is slidable capacitance sensor of suit on infusion bottle, capacitance sensor connects electronic controller, respond to the height of liquid level by capacitance sensor, measure accurately, good reliability, and dynamic response is fast, safeguards also fewer.But the capacitance sensor of this infusion alarm is owing to be sleeved on the cylinder position of infusion bottle, install, fix inconvenient, the tinsel of composition capacitance sensor and the applying of infusion bottle be defective tightness also, sensitivity is reduced, particularly also at the end just do not report to the police in transfusion, the nurse also will wait a period of time after hearing warning, transfusion just ends, cumbersome, if hearing to report to the police just stops tube for transfusion, then can cause the waste of medicinal liquid.So this infusion alarm can not get applying always.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of simple in structure, highly sensitive, and good reliability is installed, automatic alarm for transfusion easy to maintenance.

The technical scheme that realizes above-mentioned purpose is: a kind of automatic alarm for transfusion, comprise the mount pad that supports infusion bottle, the taper installing hole that matches with infusion bottle lower taper section is arranged on the mount pad, mount pad is made by elastomeric material, one side of mount pad has breach, have groove on the taper hole wall of mount pad, place two upper and lower tinsels that separate in the groove and form capacitance sensor, and upper and lower tinsel all is " C " shape in groove, upper and lower tinsel is connected with electronic controller by lead respectively.

After adopting technique scheme, breach by means of the elasticity and mount pad one side of mount pad, infusion bottle can be put into mount pad easily, because the bellmouth of mount pad and the tapered portion of infusion bottle match, rely on the gravity of infusion bottle, make infusion bottle tapered portion can with mount pad hole wall upper groove on, following tinsel fits tightly, the sensitivity and the reliability of capacitance sensor have been improved, when the liquid level in the infusion bottle drops to the tapered portion position, the capacity of capacitance sensor changes, and transmitting signals is reported to the police by electronic controller control calling set or speaker to electronic controller.When liquid level arrives the tapered portion of infusion bottle, to end near transfusion, the nurse hears that the back of reporting to the police just can stop tube for transfusion, can not cause the waste of medicinal liquid, and patient can relievedly be had a rest, and also can reduce nurse's touring number of times.The part that this utility model adopts seldom, structure is very simple, and is safe in utilization, reliable, safeguards also easily, and seldom needs maintenance.Simultaneously, rely on the elasticity and the breach of mount pad, it is also very convenient to take off infusion bottle from mount pad, as long as extract just passable.

Description of drawings

Fig. 1 is a sectional structure sketch map of the present utility model;

Fig. 2 is the schematic top plan view of Fig. 1;

Fig. 3 is the schematic circuit of electronic controller of the present utility model.

The specific embodiment

Below in conjunction with drawings and Examples this utility model is described in further detail.

As shown in Figure 1, 2, a kind of automatic alarm for transfusion, comprise the mount pad 4 that supports infusion bottle 1, the taper installing hole that matches with infusion bottle 1 lower taper section is arranged on the mount pad 4, mount pad 4 is made by elastomeric material, adopt rubber in the present embodiment, one side of mount pad 4 has breach, have groove on the hole wall of mount pad 4, place two upper and lower tinsels that separate 2,6 in the groove and form capacitance sensor, and upper and lower tinsel 2,6 all is " C " shape in groove, and upper and lower tinsel 2,6 is connected with electronic controller 7 by lead respectively.Upper and lower tinsel 2,6 adopts Copper Foil or aluminium foil, and between them is 2～3 millimeters apart from d.

As shown in Figure 1, 2, the back side of upper and lower tinsel 2,6 is lined with insulating barrier 3, and the another side of insulating barrier 3 is lined with metal forming plate 5, and tinsel 6 is electrically connected with metal forming plate 5 down.Adopt this structure, can improve the shielding properties of capacitance sensor, prevent that capacitance sensor is subjected to external interference, improve the sensitivity of capacitance sensor.

As shown in Figure 1, the lower end of metal forming plate 5 has flange 5-1, and following tinsel 6 contacts with this flange 5-1.Adopting this structure mainly is being electrically connected of tinsel 6 and metal forming plate 5 for convenience down.

Automatic clamp that can stop to the tube for transfusion that is connected in infusion bottle 1 automatically of electronic controller 7 controls.After adopting this structure, even the nurse is absent from the scene, this infusion alarm also can be with the cutout of the tube for transfusion of infusion bottle 1, guarantees the safety of infusing, and avoids the generation of accident.

As shown in Figure 3, be the schematic circuit of electronic controller 7 of the present utility model.It is a single capacitor pulse width modulation measuring circuit, and sort circuit has many characteristics: simple in structure, use flexibly, easy to adjust, capacitance variations is had linear output etc.In Fig. 3, Cs is a sensor capacitance, and Cr is a reference capacitance, and they constitute charge-discharge circuit with R1, R2, VT1, VT2 respectively.Cr, the frequency of oscillation of R2 and comparator reference level Vref decision-making circuit.When energized, Cs, Cr are by R1, R2 charging, and level V1, V2 reduce by index.Because the full scale value of selected reference capacitance Cr ratio sensor capacitor C s is bigger in the circuit, and R1 equates that with R2 so V1 at first reaches comparative level Vref, so comparator C P1 overturns, output level is exported high level from high to low after VT3 is anti-phase; When V2 reaches Vref, comparator C P2 upset, switching tube VT1, VT2 conducting, Cs, Cr discharge rapidly.Therefore, V1, V2 rise to high level again, and comparator C P1 exports high level, and the VT3 output low level has finished once discharging and recharging the cycle.

Operation principle of the present utility model is as follows: when the transfusion duty, infusion bottle 1 tube for transfusion leads to liquid, automatic clamp on the tube for transfusion are opened, when the liquid level in the infusion bottle 1 drops to the capacitance sensor of being made up of upper and lower tinsel 2,6, the capacity of capacitance sensor changes, capacitance sensor passes to electronic controller 7 with the variation of signal, the circuit of electronic controller 7 is introduced work as described above, and control buzzer or speaker warning, make the nurse know the situation of transfusion at once, so that take off tube for transfusion and infusion bottle.Simultaneously, electronic controller 7 also can be controlled automatic clamp action, makes the tube for transfusion cutout.Even the nurse is absent from the scene, also can guarantee the safety of infusing.

Claims

1, a kind of automatic alarm for transfusion, the mount pad (4) that comprises supporting infusion bottle (1), the taper installing hole that matches with infusion bottle (1) lower taper section is arranged on the mount pad (4), it is characterized in that: mount pad (4) is made by elastomeric material, one side of mount pad (4) has breach, have groove on the taper hole wall of mount pad (4), on two of placements separate in the groove, following tinsel (2,6) form capacitance sensor, and on, following tinsel (2,6) in groove, all be " C " shape, on, following tinsel (2,6) be connected with electronic controller (7) by lead respectively.

2, automatic alarm for transfusion according to claim 1, it is characterized in that: the back side of upper and lower tinsel (2,6) is lined with insulating barrier (3), the another side of insulating barrier (3) is lined with metal forming plate (5), and tinsel (6) is electrically connected with metal forming plate (5) down.

3, automatic alarm for transfusion according to claim 2 is characterized in that: the lower end of metal forming plate (5) has flange (5-1), and following tinsel (6) contacts with this flange (5-1).

4, according to claim 1 or 2 or 3 described automatic alarm for transfusion, it is characterized in that: automatic clamp that can stop to the tube for transfusion that is connected in infusion bottle (1) automatically of electronic controller (7) control.

5, according to claim 1 or 2 or 3 described automatic alarm for transfusion, it is characterized in that: between the upper and lower tinsel (2,6) is 2～3 millimeters apart from d.