CN201658365U

CN201658365U - Pressure monitoring sensor

Info

Publication number: CN201658365U
Application number: CN2009201305143U
Authority: CN
Inventors: 王涛; 李梁峰
Original assignee: SCW MEDICATH Ltd
Current assignee: SCW MEDICATH Ltd
Priority date: 2009-04-09
Filing date: 2009-04-09
Publication date: 2010-12-01
Anticipated expiration: 2019-04-09

Abstract

The utility model belongs to the field of medical apparatuses and discloses a pressure monitoring sensor capable of precisely measuring various pressure values (such as central venous pressure, pulmonary arterial pressure, left coronary arterial pressure and the like) and directly obtaining the physiological parameter of blood pressure. Although currently used pressure sensors can monitor blood pressure values of patients to a certain degree, all the pressure sensors have some shortcomings and can not meet clinical requirements in long-term consideration. The pressure monitoring sensor adopts a microelectronic chip to be directly communicated with a blood vessel of a patient through a plastic tube, so that a closed pressure system is formed. Heparin physiological saline inside a pressurizing bag continuously flows through a flow rate controller in the manner of keeping a flow rate about 2ml/h, and enters an elongated tube cavity connected with the blood vessel of a human body so as to effectively prevent blood coagulation and avoid the influence on monitored values. The pressure monitoring sensor is realized by mainly adopting the mode of plastic microtubule silk threading, and can provide important objective basis for clinical disease diagnosis, treatment and prognostic estimation.

Description

The pressure monitoring pick off

Technical field:

In the actual clinical operation process, patient's actual blood pressure value takes correct therapeutic scheme particularly important to the operator.This utility model has promptly been realized pressing equal pressure to monitor in real time to various pressure values such as central venous pressure, pulmonary artery pressure, left coronary artery, directly obtain this physiological parameter of blood pressure, thereby estimate to provide objective basis for clinical diagnosis, treatment and prognosis disease.

Background technology:

In the clinical operation process, patient's pressure value (central venous pressure, pulmonary artery pressure, left coronary artery pressure etc.) can directly reflect the variation of its vital signs.Thereby, be convenient to grasp patient's physiological situation on the one hand by to its monitoring data analysis, also be convenient to the operator on the other hand and take correct treatment measure.Therefore, to achieve these goals, and at the clinical monitoring sensor of working pressure widely.The at present employed pressure transducer that the patient is carried out pressure monitoring roughly has following several types:

1) sphygomanometer etc.The method is simple to operate, and DATA REASONING is more directly perceived.But it is accurate inadequately that its shortcoming is a measured value, and directly influenced by operator's technology and experience, and more because it is to reflect indirectly by the patient measurement at some position outward, therefore the pressure type of its measurement simultaneously seldom can't reflect the vital signs of sufferer comprehensively;

2) electrode measurement.The method and preceding method are similar, and its measured value also is to obtain pressure data by some position that electrode slice is affixed on sufferer, reflects the physiological function of sufferer indirectly, and is same, can't give operator's information accurately;

3) a kind of pressure transducer of replaceable type.Though this apparatus has adopted a pressure sensing chip,, and adopt the chip part reusable because cost has been taken in its design too much into account.For fear of chip by the pollution of medicinal liquid or blood, therefore it has adopted one deck barrier film with medicinal liquid or blood and chip isolation, though the method use cost is lower, measuring range is wide, but it is owing to be by barrier film blood pressure to be passed to chip, therefore pressure has been caused certain loss, because of rather than accurately measure, and this measurement for venous pressure to influence be very big, simultaneously, because chip is repeatedly used, there is the deviation of polluting that may reach performance, therefore also there is certain defective;

In sum,, reflect its physiological function, all have such or such shortcoming, take a long view, all can't satisfy clinical requirement though said method can be monitored patient's pressure value on a degree.

The utility model content:

The purpose of this utility model provides a kind of lower cost, disposable use, Wicresoft and can accurately measure patient blood value (its value directly shows numerical value by monitor), is convenient to the pressure monitoring pick off that the operator takes accurate therapeutic scheme.

For solving the problems of the technologies described above, this utility model provides a kind of pressure monitoring pick off, this pressure monitoring pick off comprises that microelectronic chip is arranged, the loam cake mutually bonding with microelectronic chip, the jut of microelectronic chip and the bonding formation of the cavity of loam cake are airtight, the line trap that is connected with microelectronic chip and be connected lower cover, simultaneously, also have an end to link to each other with the medicinal liquid outfan of loam cake, the prolongation pipe that the other end links to each other with human vas, with the silica gel flushing valve that the medicinal liquid input of loam cake links to each other, the inner chamber of silica gel flushing valve is equipped with flow controller; Wherein the form of flow controller can adopt glass microtubule, plastic cement microtubule to keep somewhere fine stainless steel wire and injection moulding plastic cement microtubule; The other end of silica gel flushing valve links to each other with the medicinal liquid input port, and the medicinal liquid input port then prolongs pipe by one and links to each other with inflating bag; Like this, inflating bag, prolongation pipe, medicinal liquid input port, silica gel flushing valve, flow controller, loam cake, microelectronic chip, prolongation pipe and human vas have constituted the tube chamber system of a sealing.

The projection of described microelectronic chip and the cavity of loam cake bond together and constitute airtight; Medicinal liquid or blood can directly act on microelectronic chip during by sealing tube chamber system, microelectronic chip can with the force value of medicinal liquid or blood by the line trap synchronous transfer to monitor, monitor can show this force value in real time.

The inner chamber of described silica gel flushing valve is equipped with flow controller; In clinical course, medicinal liquid can only be passed through by the micropore of flow controller; The form of flow controller can adopt glass microtubule, plastic cement microtubule to keep somewhere fine stainless steel wire and injection moulding plastic cement microtubule, reaches the purpose of the required flow of control by the different length of microtubule in the design discharge controller.

What particularly point out is:

1) this utility model adopts microelectronic chip directly to be connected with the sufferer blood vessel, and constitute the pressure system of a sealing by the plastic cement pipe.When the blood pressure of sufferer changes, the pressure of this variation acts on microelectronic chip simultaneously, chip can be converted into electric impulse signal with pressure signal in real time, and this pulse signal is transferred to monitor, so pressure value is shown accurately that on monitor the operator just can take the corresponding treatment measure according to the variation of pressure value.

2) because pressure monitor is managed the pressure system that constitutes a sealing with human vas by prolonging, pick off is when the monitoring blood pressure, blood of human body is understood some and is back in the plastic cement prolongation pipe, if the liquid that prolongs in the pipe does not have certain flowing, effectively do not diluted, time one is long, then the blood flow of Hui Liuing can condense into clot, will influence the monitoring result of pressure value, when serious, can block and prolong the pipe tube chamber, cause the serious deviation of measured value, and this will certainly give the information of a mistake of operator and take wrong treatment measure, on the other hand, when the too big flow of liquid flow in its prolongation pipe is big, both can offset partly pressure value, the result of Ce Lianging just can not reflect the actual blood pressure value so, simultaneously, for the infant patient, flow greatly also can cause edema and other serious ill effects.Therefore, the liquid that both need keep prolonging in the pipe keeps certain flowing, and does not influence the monitoring result of pressure transducer again, and clinical experience shows, keep the flow about 2ml/h to address the above problem with certain density heparin-saline, and this utility model has promptly been realized this requirement.

Usually in use, can use the inflating bag that heparin-saline is housed, inflating bag pressure remains on about 200mmHg usually, inflating bag prolongs pipe by a plastic cement and links to each other with the input of pressure monitoring pick off, the outfan of pressure transducer prolongs pipe by a plastic cement again and links to each other with human vas, has so promptly constituted the tube chamber pressure system of a sealing.This utility model is equipped with a silica gel flushing valve at the input end of pressure transducer, endoporus in the silica gel flushing valve is equipped with a flow controller, under the normal condition, heparin-saline can only be by the flow controller flows through sensor in the silica gel flushing valve in the inflating bag, the flow velocity of its flow-control about 2ml/h, because heparin-saline has the effect that prevents blood clotting, therefore both solved big flow to the influence of pressure value and the serious consequence that may bring the patient, simultaneously effectively prevented blood coagulation again, avoided its problem the monitor value influence.What particularly point out is: the flow controller in this utility model is realized in the following ways:

A) adopt the trickle pipe of glass fiber (being called for short the glass microtubule) to control flow.Because the manufacturing of glass microtubule can make its micropore reach to be caused very for a short time, and cuts into required length by certain requirement.When heparin-saline was flowed through the glass microtubule, because its endoporus very little (little of 0.025mm), liquid was just very little by the flow of glass microtubule unit cross-sectional area in the unit interval so, therefore reaches the requirement of control flow;

B) adopt plastic cement capillary microtubule (being called for short the plastic cement microtubule) to control flow.Because the processing technique of plastic cement microtubule is than glass microtubule difference, its method is when the molding of plastic cement pipe, and a fine stainless steel wire is placed by portion within it, wait molding after, again fine stainless steel wire is extracted out.Therefore, the diameter of fine stainless steel wire has promptly determined the size of plastic cement microtubule diameter.(hour the easy fracture too because internal diameter of fine stainless steel wire can not be too little, be difficult for extracting out), do not reach the size of glass microtubule, therefore, this utility model adopts and place a fine stainless steel wire in the plastic cement microtubule, thereby reduce the inner hole section of plastic cement microtubule is long-pending, thereby reach the identical effect of glass microtubule;

C) method that adopts the engineering plastics injection moulding to reel off raw silk from cocoons is made flow controller.Its method is that fine stainless steel wire is placed in the special mould, by being injection molded into required flow controller shape, then microfilament is extracted out, so the diameter of microfilament has promptly determined the size of flow controller micropore.

Description of drawings

Below in conjunction with the drawings and specific embodiments this utility model is further elaborated

Figure one: for this utility model structure is always schemed;

1-microelectronic chip 2-loam cake 3-silica gel flushing valve 4-flow controller 5-medicinal liquid input port 6-prolongs pipe 7-line trap

Figure two: be the microelectronic chip of this utility model employing and the structure chart of microelectronic chip and housing; 1-microelectronic chip 2-loam cake 3-silica gel flushing valve 4-flow controller 5-medicinal liquid input port

Figure three: be this utility model flow controller structure chart.

The plastic cement pipe 10-micropore 11-stainless steel silk of 8-liner skeleton 9-band micropore

The specific embodiment:

Shown in figure one, microelectronic chip 1 and loam cake 2 adopt bonding method to combine, the cavity of loam cake 2 and chip constitute one, when in the cavity during filling liquid, the pressure of liquid directly acts on the chip 1, and chip 1 gets final product this pressure of perception, under the situation of energising, and pressure can be converted to the signal of telecommunication and be transferred on the monitor, face and protect instrument and can directly show this force value;

Shown in figure two, one end of silica gel flushing valve 3 links to each other with loam cake 2, the other end links to each other with medicinal liquid input port 5, inner chamber in silica gel flushing valve 3 can be equipped with flow controller 4, because its two cooperation closely, so entering the medicinal liquid of input port 5 can only be by the interior micropore of flow controller 4, flow controller can adopt: glass microtubule and plastic cement microtubule and plastic cement microtubule are worn three kinds of modes of silk, and this utility model is mainly to adopt the plastic cement microtubule to wear the form of silk.When clinical use; usually can use an inflating bag; after the heparin-saline in the inflating bag enters medicinal liquid input port 5 by a prolongation pipe; enter the micropore of flow controller; the length of design discharge controller can be with flow-control about 2ml/h; heparin-saline enters the prolongation pipe tube chamber that links to each other with human vas after flowing through flow controller; because in real process; this heparin-saline is the inflow that continues; therefore can effectively eliminate the blood coagulation that prolongs in the enclosed cavity of managing loam cake 2; and since its flow about 2ml/h, so all avoided microelectronic chip is monitored the influence of pressure value.

Claims

1. the pressure monitoring pick off comprises has microelectronic chip (1), it is characterized in that the loam cake (2) mutually bonding with microelectronic chip (1), the bonding formation of cavity of the jut of microelectronic chip (1) and loam cake (2) is airtight, the line trap (7) that is connected with microelectronic chip (1) and be connected lower cover, simultaneously, also have an end to link to each other with the medicinal liquid outfan of loam cake (2), the prolongation pipe (6) that the other end links to each other with human vas, with the silica gel flushing valve (3) that the medicinal liquid input of loam cake (2) links to each other, the inner chamber of silica gel flushing valve (3) is equipped with flow controller (4); Wherein the form of flow controller (4) can adopt glass microtubule, plastic cement microtubule to keep somewhere fine stainless steel wire (11) and injection moulding plastic cement microtubule; The other end of silica gel flushing valve (3) links to each other with medicinal liquid input port (5), and medicinal liquid input port (5) then prolong pipe (6) by one and link to each other with inflating bag; Like this, inflating bag, prolongation pipe (6), medicinal liquid input port (5), silica gel flushing valve (3), flow controller (4), loam cake (2), microelectronic chip (1), prolongation pipe (6) and human vas have constituted the tube chamber system of a sealing.

2. pressure monitoring pick off according to claim 1 is characterized in that: the cavity of the projection of described microelectronic chip (1) and loam cake (2) bonds together and constitutes airtight; Medicinal liquid or blood can directly act on microelectronic chip (1) during by sealing tube chamber system, microelectronic chip (1) can with the force value of medicinal liquid or blood by line trap (7) synchronous transfer to monitor, monitor can show this force value in real time.

3. according to wanting the described pressure monitoring pick off of claim 1, its feature also is: the inner chamber of described silica gel flushing valve (3) is equipped with flow controller (4); In clinical course, medicinal liquid can only be passed through by the micropore of flow controller (4); The form of flow controller can adopt glass microtubule, plastic cement microtubule to keep somewhere fine stainless steel wire (11) and injection moulding plastic cement microtubule, reaches the purpose of the required flow of control by the different length of the interior microtubule of design discharge controller (4).