CN113598738A - Flow velocity adjusting device and invasive blood pressure measuring equipment - Google Patents
Flow velocity adjusting device and invasive blood pressure measuring equipment Download PDFInfo
- Publication number
- CN113598738A CN113598738A CN202111050143.XA CN202111050143A CN113598738A CN 113598738 A CN113598738 A CN 113598738A CN 202111050143 A CN202111050143 A CN 202111050143A CN 113598738 A CN113598738 A CN 113598738A
- Authority
- CN
- China
- Prior art keywords
- flow rate
- blood pressure
- pipeline
- liquid
- flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/0215—Measuring pressure in heart or blood vessels by means inserted into the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/02141—Details of apparatus construction, e.g. pump units or housings therefor, cuff pressurising systems, arrangements of fluid conduits or circuits
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Cardiology (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Physiology (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Vascular Medicine (AREA)
- Biomedical Technology (AREA)
- Physics & Mathematics (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The application provides a velocity of flow adjusting device and use its invasive blood pressure measurement equipment for adjust the liquid flow velocity of the transfusion pipeline that flows through invasive blood pressure measurement equipment, including first connecting portion, velocity of flow regulation portion and second connecting portion, first connecting portion, velocity of flow regulation portion and second connecting portion have the liquid circulation pipeline of intercommunication, velocity of flow regulation portion includes cylindric micropore pipe and cladding the velocity of flow switching pipe of micropore pipe, the micropore pipe is provided with first micropore and second micropore, flows through the liquid of velocity of flow regulation portion has first velocity of flow and the second velocity of flow, the second velocity of flow is greater than first velocity of flow. The application provides a velocity of flow adjusting device and use its invasive blood pressure measurement equipment can be fast, accurate, convenient, adjust invasive blood pressure measurement pipeline's the liquid velocity of flow and detect the patency of pipeline reliably.
Description
Technical Field
The application belongs to the invasive blood pressure measuring field, and particularly relates to a flow velocity regulating device and invasive blood pressure measuring equipment using the same.
Background
Invasive Blood Pressure (IBP) measurement is a method of directly measuring the Blood pressure in a Blood vessel after puncturing and placing the Blood vessel, can directly, continuously and dynamically monitor the real Blood pressure condition of a patient, and is widely applied in the field of emergency treatment, cardiovascular surgery, intensive care units and surgical anesthesia.
The principle of obtaining blood pressure by invasive blood pressure measurement is as follows: the Pressure sensor converts the intravascular Pressure into an electric signal and processes the electric signal to display Blood Pressure waveform and Blood Pressure values in a continuous and dynamic mode on a Blood Pressure display device such as an electrocardiogram monitor screen and the like, wherein the Blood Pressure waveform and the Blood Pressure values comprise Systolic Pressure (SBP), Diastolic Pressure (DBP), average arterial Pressure and the like.
One of the complications of invasive blood pressure measurement is air embolism, for example, air bubbles contained in a liquid circulation pipeline may enter a human blood vessel along with blood flowing backwards to form air embolism, and in severe cases, the air embolism may enter a cerebral blood vessel to cause cerebral embolism; in addition, the presence of air bubbles also affects the patency of the fluid line and further affects the accuracy of the blood pressure measurement, so that prior to lancing, the fluid flow line needs to be flushed with a perfusate to evacuate the air bubbles.
In clinical application of invasive blood pressure measurement, it is found that even if bubbles in the liquid flow pipeline are completely exhausted before puncturing, a large number of micro bubbles are generated and attached to the inner wall of the liquid flow pipeline and gradually fused to form bubbles with larger volume along with the passage of time, and in addition, thrombus formed at the tail end of the pipeline in a patient body can influence the accuracy of a blood pressure measurement result, so that the smoothness of the liquid pipeline needs to be frequently detected clinically to ensure the accuracy and the safety of the blood pressure measurement result.
The existing invasive blood pressure measuring equipment generally uses a slender columnar pulling part arranged on a flow rate adjusting device to perform the detection, specifically, the pulling part is pulled up and then loosened, so that the flow rate of perfusate flowing through the flow rate adjusting device and a pressure sensor pipeline is changed, the change of the liquid pressure detected by the pressure sensor is caused, and further, the change amplitude and the change speed of the liquid pressure displayed on a blood pressure display device are interpreted, so that whether air bubbles, thrombus and other factors influencing the smoothness of the pipeline exist in the invasive blood pressure measuring pipeline or not is detected.
In the actual use process, the following problems exist: the long and thin columnar lifting part is easy to break, so that the pipeline smoothness detection can not be carried out any more; the flow rate change amplitude is different due to different pulling amplitudes each time, so that the change amplitude of the liquid pressure waveform is different and the interpretation of the liquid pressure waveform is influenced; in addition, there is a certain inconvenience in pulling up the elongated pulling portion upward. Therefore, it is necessary to provide a convenient, reliable and highly consistent flow rate regulating device and an invasive blood pressure measuring device using the same, so as to meet the requirement of rapidly, accurately, conveniently and reliably detecting the patency of an invasive blood pressure measuring pipeline in the invasive blood pressure measuring state of a patient.
Disclosure of Invention
In order to solve the above problems, the present application provides a flow rate regulating device and includes flow rate regulating device's invasive blood pressure measurement equipment for detect the patency of invasive blood pressure measurement pipeline fast, accurately, conveniently, reliably under the state of carrying out invasive blood pressure measurement to the patient.
One aspect of the present application provides a flow rate regulating device, including a first connecting portion, a flow rate regulating portion, and a second connecting portion, the first connecting portion, the flow rate regulating portion, and the second connecting portion having a liquid flow-through pipeline in communication; the flow rate adjusting part comprises a cylindrical microporous tube and a flow rate switching tube wrapping the microporous tube, and the microporous tube is provided with a first micropore and a second micropore; the liquid flowing through the flow rate adjusting portion has a first flow rate for performing invasive blood pressure measurement and a second flow rate for detecting patency of an invasive blood pressure measurement line, the second flow rate being greater than the first flow rate.
Preferably, the first flow rate is 2 to 4 ml/h and the second flow rate is 10 to 60 ml/min.
Further, the micro-hole tube is made of a hard material, and the flow rate switching tube is made of a soft material having elasticity.
Further, the first micropore is positioned at the radial center of the micropore pipe and penetrates through the micropore pipe along the axial direction; the second micro-hole has a first opening located at an upper side of an outer wall of the micro-hole tube and a second opening located at an upper portion of a cross section of the micro-hole tube toward one end of the second connection portion.
Further, the flow rate switching pipe comprises a hollow elastic round pipe, annular sealing parts positioned at two ends of the hollow elastic round pipe and an axial push-pull part positioned at the upper part of the outer wall of the hollow elastic round pipe; the hollow elastic round pipe is wrapped on the microporous pipe in an interference fit mode, and the inner wall of the hollow elastic round pipe covers the first opening towards the outer edge of one end of the first connecting part; the annular sealing part is formed by extending two ends of the hollow elastic circular tube along the axial direction, and the diameter of the inner wall of the annular sealing part is larger than that of the outer wall of the microporous tube.
Further, the first connecting portion includes a first liquid pipeline, a first truncated cone-shaped protrusion located at the first liquid pipeline and extending axially toward one end of the flow rate adjusting portion, a first sealing groove located at an outer side of the first truncated cone-shaped protrusion, a first guiding groove located at an upper portion of the first liquid pipeline facing one end of the flow rate adjusting portion and an upper portion of the first truncated cone-shaped protrusion, a first limiting portion located at a lower portion of the first liquid pipeline, and a pipeline joint located at one end of the first liquid pipeline away from the flow rate adjusting portion; the second connecting part comprises a second liquid pipeline, a second truncated cone-shaped protruding part, a second sealing groove, a second diversion groove and a second limiting part, the second truncated cone-shaped protruding part is located on the second liquid pipeline and extends axially towards one end of the flow speed adjusting part, the second sealing groove is located on the outer side of the second truncated cone-shaped protruding part, the second diversion groove is located on the upper portion, towards one end of the flow speed adjusting part, of the second liquid pipeline and the upper portion of the second truncated cone-shaped protruding part, and the second limiting part is located on the lower portion of the second liquid pipeline; the diameter of the inner wall of the first liquid pipeline is smaller than that of the outer wall of the microporous pipe, and the diameter of the inner wall of the first truncated cone-shaped protruding part is larger than that of the outer wall of the microporous pipe; the diameter of the inner wall of the second liquid pipeline is smaller than that of the outer wall of the microporous pipe, and the diameter of the inner wall of the second circular truncated cone-shaped protruding portion is larger than that of the outer wall of the microporous pipe.
Furthermore, the first sealing groove and the second sealing groove are in sealing connection with the annular sealing part through interference fit, and the bottom surfaces of the first sealing groove and the second sealing groove are in non-fixed contact with the end surface of the annular sealing part; the first limiting part and the second limiting part are detachably and fixedly connected; the end face of the first liquid pipeline facing one end of the flow speed adjusting part and the end face of the second liquid pipeline facing one end of the flow speed adjusting part are in non-fixed contact with the end faces of the two ends of the microporous pipe.
Further, the first connecting part is communicated with a transfusion pipeline of the blood pressure measuring equipment through a pipeline joint; the second connecting part is fixedly connected with a pressure sensor of the blood pressure measuring equipment, and the second liquid pipeline is communicated with the liquid pipeline of the pressure sensor.
Preferably, the liquid flowing through the flow-rate regulation portion further has a third flow rate, the third flow rate being greater than the second flow rate; the flow rate switching tube also comprises extrusion sheets positioned on two sides of the upper part of the outer wall of the hollow elastic circular tube.
Advantageous effects of the present application
The flow rate adjusting device and the invasive blood pressure measuring device provided by the embodiment of the application set the number of the micropores of the microporous tube to be two, the microporous tube is axially limited by the first liquid pipeline and the second liquid pipeline, the second micropore is switched between a liquid circulation state and a closed state by pulling and loosening the axial limiting part, and further the liquid flowing through the flow rate adjusting device is switched between the second flow rate and the first flow rate, so that the liquid pressure waveform obtained by the pressure sensor is converted. The flow velocity adjusting device can keep the second flow velocity stable, and solves the problem that liquid pressure waveforms are inconsistent due to the fact that the existing flow velocity adjusting device is unstable when the lifting part is lifted; the embodiment of the application also solves the problem that the smoothness detection of the invasive blood pressure measuring pipeline cannot be carried out due to the fact that the lifting part is easy to be broken; meanwhile, compared with the conventional operation of pulling up the lifting part, the axial push-pull part is pulled, so that the detection of the patency of the invasive blood pressure measuring pipeline is more convenient and quicker.
Another aspect of the present application further provides an invasive blood pressure measurement apparatus, which can detect the patency of an invasive blood pressure measurement pipeline in a state of invasive blood pressure measurement on a patient, and includes an infusion pipeline, a pressurizable infusion bag, a syringe, a pressure sensor, a blood pressure display device, a zeroing three-way valve, a puncture device, and an intravascular catheter; the flow rate adjusting device is also included.
Drawings
Fig. 1 is an assembly view of a conventional flow rate regulating part;
FIG. 2 is a system block diagram of an invasive blood pressure measurement device according to an embodiment of the present application;
FIG. 3 is an enlarged view of a portion of the circled portion of FIG. 2;
FIG. 4 is a perspective view of a section of a microporous tube B-B according to an embodiment of the present application;
fig. 5(a) is a perspective view of a flow rate switching tube according to an embodiment of the present application;
FIG. 5(B) is a perspective view of the flow switching tube and the microporous tube taken along direction B-B in the embodiment of the present application;
FIG. 6 is a partial enlarged view of the circled portion of FIG. 5 (b);
fig. 7 is a perspective view of a first connection portion according to an embodiment of the present application;
FIG. 8 is a perspective view of a first connection portion B-B in a half-cut view of an embodiment of the present application;
FIG. 9 is a perspective view of a second connection portion of an embodiment of the present application;
FIG. 10 is a perspective view of a second connecting portion B-B in a half-cut view according to an embodiment of the present application;
fig. 11 is an exploded view of the assembly of the flow rate adjustment device according to the embodiment of the present application;
FIG. 12(a) is a plan view taken along line B-B of the flow rate regulating device in the invasive blood pressure measuring state according to the embodiment of the present application;
FIG. 12(b) is a partial enlarged view of the circled portion of FIG. 12 (a);
FIG. 13(a) is a B-B cut plan view of the flow rate adjusting device according to the embodiment of the present application in a state where the axial push-pull portion is pulled when the patency of the invasive blood pressure measurement tube is detected;
FIG. 13(b) is a partial enlarged view of the circled portion of FIG. 13 (a);
fig. 14 is a flowchart of invasive blood pressure measurement device performing invasive blood pressure measurement tube patency detection according to an embodiment of the present application;
FIG. 15(a) is a schematic diagram illustrating a transition state of a fluid pressure waveform in a state where an invasive blood pressure measurement circuit is open according to an embodiment of the present application;
fig. 15(b) is a schematic diagram of a transition state of a pressure waveform when there are factors affecting patency, such as air bubbles and thrombus, in the invasive blood pressure measurement line according to the embodiment of the present application.
Reference numerals in the figures
1 flow rate regulating device, 11 a first connecting part, 111 a first liquid pipeline, 112 a first truncated cone-shaped protrusion part, 113 a first sealing groove, 114 a first diversion trench, 115 a first limiting part, 116 a pipeline joint, 12 a flow rate regulating part, 121 a micropore pipe, 1211 a first micropore, 1212 a second micropore, 1213 a first opening, 1214 a second opening, 122 a flow rate switching pipe, 1221 a hollow elastic circular pipe, 1222 circular ring-shaped sealing part, 1223 an axial push-pull part, 1224 a pressing sheet, 13 a second connecting part, 131 a second liquid pipeline, 132 a second truncated cone-shaped protrusion part, 133 a second sealing groove, 134 a second diversion trench, 135 a second limiting part, 2 a pressure sensor, 21 a lead wire, 3 a blood pressure display device, 4 an infusion pipeline, 5 an infusion set, 6 a pressurizable infusion bag, 7 a roller regulator, 8 a zero calibration three-way valve, 9 a three-way valve, 10 a puncture joint and 101 an intravascular catheter.
Detailed Description
The present application is further described below in conjunction with the following figures based on preferred embodiments, and it is to be understood that the specific examples described herein are for purposes of illustration only and are not intended to limit the present application.
In addition, for convenience of understanding, various components on the drawings are enlarged (thick) or reduced (thin), but this is not intended to limit the scope of the present application.
Singular references also include plural references and vice versa.
In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually arranged when the embodiments of the present application are used, the description is only for convenience and simplicity, but the indication or suggestion that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, cannot be understood as the limitation of the present application. Moreover, the terms first, second, etc. may be used in the description to distinguish between various elements, but these should not be limited by the order of manufacture or by importance to be understood as indicating or implying any particular importance, such as may be found in various claims.
The terminology used in the description is for the purpose of describing the embodiments of the application and is not intended to be limiting of the application. It is also to be understood that, unless otherwise expressly stated or limited, the terms "disposed," "connected," and "connected" are intended to be open-ended, i.e., may be fixedly connected, detachably connected, or integrally connected; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, or may be interconnected between two elements. The above-mentioned meanings specifically ascribed to the present application will be understood to those skilled in the art.
Before describing the embodiments of the present application, we first describe a flow rate adjusting portion of an existing blood pressure measuring device, fig. 1 is an assembly schematic diagram of the flow rate adjusting portion of the existing blood pressure measuring device, as shown in fig. 1, the flow rate adjusting portion of the existing blood pressure measuring device includes a cylindrical microporous tube made of a hard material and a flow rate switching tube made of a soft elastic material and covering the microporous tube (for clarity, the flow rate switching tube is cut along a-a direction in the drawing), the flow rate switching tube covers the microporous tube by interference fit and is respectively connected with connecting parts at two ends in a sealing manner, in an invasive blood pressure measuring state, perfusion fluid in the invasive blood pressure measuring tube can only flow through a micropore located at a radial center of the microporous tube, when the patency of the invasive blood pressure measuring tube needs to be detected, a pulling portion located at an upper portion of the flow rate switching tube is pulled upward, due to the elasticity of the flow rate switching tube, a liquid passage is formed between the flow rate switching tube and the microporous tube, so that the perfusion liquid in the invasive blood pressure measuring pipeline can flow through the micropores of the microporous tube and the liquid passage between the flow rate switching tube and the microporous tube at the same time. The change of the liquid pressure detected by the pressure sensor can be caused by adjusting the flow rate of the perfusion liquid flowing through the flow rate adjusting part, and the change amplitude and the change speed of the liquid pressure displayed on the blood pressure display device are further interpreted, so that whether air bubbles, thrombus and other factors influencing the smoothness of the pipeline exist in the invasive blood pressure measuring pipeline or not is detected.
In the actual use process, the following problems exist when the conventional flow velocity adjusting part and the connecting part thereof are used for detecting the patency of the invasive blood pressure measuring pipeline: (1) the long and thin columnar lifting part is easy to break, so that the pipeline smoothness detection can not be carried out any more; (2) the flow rate change amplitude is different due to different pulling amplitudes each time, so that the change amplitude of the liquid pressure waveform is different and the interpretation of the liquid pressure waveform is influenced; (3) in addition, there is a certain inconvenience in pulling up the elongated pulling portion upward.
Therefore, it is necessary to provide a convenient, reliable and highly consistent flow rate regulating device and an invasive blood pressure measuring device using the same, so as to meet the requirement of rapidly, accurately, conveniently and reliably detecting the patency of an invasive blood pressure measuring pipeline in the invasive blood pressure measuring state of a patient.
An aspect of an embodiment of the present application provides a flow rate adjustment device for adjusting a flow rate of a liquid flowing through an infusion line of an invasive blood pressure measurement apparatus, fig. 2 shows a system configuration diagram of the invasive blood pressure measurement apparatus including the flow rate adjustment device 1 of the embodiment of the present application, fig. 3 is a partially enlarged view of a circled portion in fig. 1, as shown in fig. 2 and 3, the flow rate adjustment device 1 includes a first connection portion 11, a flow rate adjustment portion 12, and a second connection portion 13, the first connection portion 11, the flow rate adjustment portion 12, and the second connection portion 13 have a liquid flow line in communication;
the liquid flowing through the flow rate adjustment section 12 has a first flow rate for performing invasive blood pressure measurement and a second flow rate for detecting patency of the invasive blood pressure measurement line, the first flow rate being greater than the second flow rate.
In the embodiment of the present application, the pressure sensor 2, the lead 21, the blood pressure display device 3, the infusion pipeline 4, the perfusion unit 5, the pressurizable infusion bag 6, the roller regulator 7, the zero-calibration three-way valve 8, the three-way valve 9, the puncture connector 10, the intravascular catheter 101, and the like of the invasive blood pressure measuring apparatus are standard components or general components known to those skilled in the art, and the structure and principle thereof are known to those skilled in the art.
Preferably, the first flow rate is 2 to 4 ml/h and the second flow rate is 10 to 60 ml/min.
Further, the flow rate regulating section 12 includes a cylindrical microporous tube 121 and a flow rate switching tube 122 covering the microporous tube 121; the orifice tube 121 is made of a hard material, and the flow rate switching tube 122 is made of a soft material having elasticity.
In some specific implementations of the embodiment of the present application, the microporous tube 121 may be made of a hard material such as medical glass, medical metal, and medical plastic, and the flow rate switching tube 122 may be made of a soft polymer material such as medical silica gel with elasticity.
The structure and assembly of the micro-hole tube 121 and the flow rate switching tube 122 will be described in detail with reference to fig. 4 to 6.
Further, as shown in fig. 4, the microporous tube 121 is provided with a first micropore 1211 and a second micropore 1212, the first micropore 1211 is located at the radial center of the microporous tube 121 and penetrates through the microporous tube 121 in the axial direction; the second micro-hole 1212 has a first opening 1213 at an upper side of an outer wall of the micro-hole tube 121 and a second opening 1214 at an upper portion of a cross section of the micro-hole tube 121 toward one end of the second connection portion 13.
Further, as shown in fig. 5(a) and 5(b), the flow rate switching tube 122 includes a hollow elastic circular tube 1221, annular sealing parts 1222 located at both ends of the hollow elastic circular tube 1221, and an axial push-pull part 1223 located at an upper part of an outer wall of the hollow elastic circular tube 1221; the hollow elastic round tube 1221 is wrapped around the microporous tube 121 by interference fit; the inner wall of the hollow elastic circular tube 1221 covers the first opening 1213 toward the outer edge of the one end of the first connection portion 11; the annular sealing portion 1222 is formed by extending both ends of the hollow elastic circular tube 1221 in the axial direction, and the inner wall diameter of the annular sealing portion 1222 is larger than the outer wall diameter of the microporous tube 121.
Specifically, in a specific implementation manner of the present embodiment, the hollow elastic circular tube 1221, the annular sealing portions 1222 located at two ends of the hollow elastic circular tube 1221, and the axial push-pull portion 1223 located at an upper portion of an outer wall of the hollow elastic circular tube 1221 may be integrally formed by molding or the like, an inner wall diameter of the hollow elastic circular tube 1221 is slightly smaller than an outer wall diameter of the microporous tube 121, so that the hollow elastic circular tube 1221 covers the microporous tube 121 by interference fit, as shown in fig. 6, an outer edge of the hollow elastic circular tube 1221 facing one end of the first connecting portion covers the first opening 1213, and an inner wall diameter of the annular sealing portion 1222 is larger than the outer wall diameter of the microporous tube 121, so that in an assembled state, liquid located between the inner wall of the annular sealing portion 1222 and the outer wall of the microporous tube 121 can only flow through the first micropores 1211.
The specific structures of the first connection portion 11 and the second connection portion 13 according to the embodiment of the present application will be described in detail below with reference to fig. 7 to 10.
In an embodiment of the present application, the first connection portion 11 includes a first liquid pipe 111, a first truncated cone-shaped protrusion 112 located at one end of the first liquid pipe 111 facing the flow rate adjustment portion 12 and extending axially, a first sealing groove 113 located outside the first truncated cone-shaped protrusion 112, a first guiding groove 114 located at an upper portion of the first liquid pipe 111 facing one end of the flow rate adjustment portion 12 and an upper portion of the first truncated cone-shaped protrusion 112, a first limiting portion 115 located at a lower portion of the first liquid pipe 111, and a pipe joint 116 located at one end of the first liquid pipe 111 away from the flow rate adjustment portion 12; the second connection portion 13 includes a second liquid pipe 131, a second truncated cone-shaped protrusion 132 axially extending from the second liquid pipe 131 toward one end of the flow rate adjustment portion 12, a second seal groove 133 located outside the second truncated cone-shaped protrusion 132, a second guide groove 134 located in an upper portion of the second liquid pipe 131 toward one end of the flow rate adjustment portion 12 and an upper portion of the second truncated cone-shaped protrusion 132, and a second stopper portion 135 located in a lower portion of the second liquid pipe 131; the diameter of the inner wall of the first liquid pipeline 111 is smaller than that of the outer wall of the microporous pipe 121, and the diameter of the inner wall of the first truncated cone-shaped protrusion 112 is larger than that of the outer wall of the microporous pipe 121; the diameter of the inner wall of the second liquid line 131 is smaller than the diameter of the outer wall of the microporous tube 121 and the diameter of the inner wall of the second truncated cone-shaped protrusion 132 is larger than the diameter of the outer wall of the microporous tube 121.
Specifically, in a specific implementation manner of the embodiment of the present application, as shown in fig. 7 and 8, the first liquid pipeline 111 extends axially toward one end of the flow-rate regulating portion 12, and the diameter of the inner wall increases to form a first truncated cone-shaped protrusion 112, the outer wall of the first truncated cone-shaped protrusion 112 may be designed to be a gradually closed cone, the first sealing groove 113 is an annular groove surrounding the outer side of the first truncated cone-shaped protrusion 112, and is formed by radially thickening the pipe wall of the first liquid pipeline 111 and extending axially in the form of an annular groove; a first guide groove 114 penetrating the first liquid pipe 111 at an upper portion of one end of the first liquid pipe 111 facing the flow rate adjustment portion 12 and an upper portion of the first circular truncated cone-shaped protrusion 112 to form a liquid passage communicating between the first liquid pipe 111 and the flow rate adjustment portion 12; the first limiting part 115 is positioned at the lower part of the first liquid pipeline 111; the pipe joint 116 may be a standard luer joint, and is located at an end of the first liquid pipe 111 away from the flow rate adjusting portion 12, for connecting with an infusion pipe.
Specifically, in a specific implementation manner of the embodiment of the present application, as shown in fig. 9 and 10, the second liquid pipeline 131 extends axially toward one end of the flow-rate regulating portion 12, and the diameter of the inner wall increases to form a second circular truncated cone-shaped protrusion 132, the outer wall of the second circular truncated cone-shaped protrusion 132 may be designed to be gradually closed, the second sealing groove 133 is an annular groove surrounding the outer side of the second circular truncated cone-shaped protrusion 132, the pipe wall of the second liquid pipeline 131 is thickened in the radial direction, and then the second liquid pipeline extends axially in the form of an annular groove; a second guide groove 134 penetrating the second liquid line 131 toward one end of the flow rate adjustment portion 12 and the second circular truncated cone-shaped protrusion 132 to form a liquid passage communicating between the second liquid line 131 and the flow rate adjustment portion 12; the second stopper 135 is located below the second liquid line 131.
In a specific implementation manner of the embodiment of the present application, the first connection portion 11 may be integrally formed by injection molding or the like; the second connection portion may be formed integrally with the housing of the pressure sensor 2 by injection molding or the like, and the second liquid line 131 and the liquid line of the pressure sensor 2 form a liquid flow line communicating with each other.
Hereinafter, the assembling method of the flow rate control device 1 and the internal fluid flow in the invasive blood pressure measuring state and the state of detecting the patency of the invasive blood pressure measuring line will be described in detail with reference to fig. 2 and fig. 11 to 13 (b).
In the embodiment of the present application, the first sealing groove 113 and the second sealing groove 133 are hermetically connected to the annular sealing portion 1222 by interference fit, and bottom surfaces of the first sealing groove 113 and the second sealing groove 133 are in non-fixed contact with an end surface of the annular sealing portion 1222; the first limiting part 115 is detachably and fixedly connected with the second limiting part 135; the end surface of the first liquid line 111 facing the end of the flow rate adjusting section 12 and the end surface of the second liquid line 131 facing the end of the flow rate adjusting section 12 are in non-fixed contact with the end surfaces of the microporous tube 121 at both ends.
Specifically, in a specific implementation manner of the embodiment of the present application, as shown in fig. 11 to 13(b), the annular sealing portions 1222 at both ends of the hollow elastic circular tube 1221 enter the first sealing groove 113 and the second sealing groove 133, respectively, end surfaces thereof are in non-fixed contact with bottom surfaces of the first sealing groove 113 and the second sealing groove 133, respectively, and the sealing connection is achieved by interference fit by using elasticity of the annular sealing portions 1222.
Specifically, in the specific implementation manner of the embodiment of the present application, as shown in fig. 11 to 13(b), end surfaces of two ends of the microporous tube 121 are respectively in non-fixed contact with an end surface of the first liquid pipeline 111 facing one end of the flow rate adjusting part 12 and an end surface of the second liquid pipeline 131 facing one end of the flow rate adjusting part 12, and since the diameter of an outer wall of the microporous tube 121 is larger than the diameters of inner walls of the first liquid pipeline 111 and the second liquid pipeline 131, the microporous tube 121 is axially limited by the first liquid pipeline 111 and the second liquid pipeline 131; the liquid fills the space between the microporous tube 121 and the annular sealing portion 1222 through the first guide groove 114 and the second guide groove 134.
As shown in fig. 2, the flow rate regulating device 1 according to the embodiment of the present application is placed in an invasive blood pressure measuring apparatus, one end of the flow rate regulating device is connected to a pressurizable infusion bag 6 and an infusion syringe 5, the other end of the flow rate regulating device is connected to a pressure sensor 2, a zero calibration three-way valve 8, a three-way valve 9 and a puncture connector 10, and the puncture connector 10 is connected to an intravascular catheter 101, so that a fluid flow path is formed by the invasive blood pressure measuring apparatus from the pressurizable infusion bag 6 to the tip of the intravascular catheter 101, at this time, the blood pressure at the tip of the intravascular catheter 101 is the blood pressure to be measured, and the pressure sensor 2 displays the measured blood pressure data and waveform on a blood pressure display device 3 through a lead 21.
When the invasive blood pressure measuring device is in the invasive blood pressure measuring state, as shown in fig. 12(a) and the partial enlarged view of fig. 12(b), the outer edge of the hollow elastic circular tube 1221 facing to the end of the first connecting portion 11 covers the first opening 1213, so that the second micro-hole 1212 is closed, and at this time, the perfusate in the invasive blood pressure measuring tube can only flow through the flow rate adjusting portion 12 through the first micro-hole 1211 and enter the liquid tube of the pressure sensor 2, and the perfusate passing through the first micro-hole 1211 has a first flow rate, preferably, the first flow rate is 2 to 4 ml/hr, at this flow rate, the liquid pressure in the liquid tube inside the pressure sensor 2 is consistent with the blood pressure at the tip of the intravascular catheter 101, and at this time, the data measured by the pressure sensor 2 and displayed on the blood pressure display device 3 is the blood pressure to be measured;
when the unobstructed property of the invasive blood pressure measuring pipeline needs to be detected, the axial push-pull part 1223 is pulled towards the second connecting part 13 and is loosened after being kept for a period of time. As shown in fig. 13(a) and the enlarged partial view of fig. 13(b), due to the elasticity of the flow rate switching tube 122, the movement of the axial push-pull portion 1223 towards the second connecting portion 13 drives the hollow elastic circular tube 1221 to make a small displacement towards the second connecting portion 13, and the microporous tube 121 is axially limited by the second liquid pipeline 131, so that the outer edge of the hollow elastic circular tube 1221 towards the end of the first connecting portion 11 no longer covers the first opening 1213, at this time, the perfusion fluid simultaneously passes through the first micropores 1211 and the second micropores 1212, and flows through the flow rate adjusting portion 12 and enters the liquid pipeline of the pressure sensor 2 at the second flow rate, preferably, the second flow rate is 10 to 60 ml/min, at this flow rate, the pressure of the perfusion fluid in the liquid pipeline inside the sensor is consistent with the pressure of the liquid in the infusion pipeline 4 at one end of the infusion device 5, at this time, the data measured by the pressure sensor 2 and displayed on the blood pressure display device 3 is the pressure of the liquid in the infusion pipeline 4 at one end of the infusion device 5, this pressure is greater than the blood pressure at the tip of the intravascular catheter 101.
After the axial push-pull part 1223 is released, the axial push-pull part 1223 drives the hollow elastic circular tube 1221 to reset towards the second connection part 13, at this time, because the microporous tube 121 is axially limited by the first connection part 11, the outer edge of one end of the hollow elastic circular tube 1221, facing the first connection part 11, covers the first opening 1213 again so as to close the second micropores 1212 again, the flow rate of the liquid flowing through the flow rate adjusting part 12 and entering the liquid line of the pressure sensor 2 becomes the first flow rate again, so that the perfusate in the liquid line of the pressure sensor 2 establishes pressure transmission with the blood at the tip of the intravascular catheter 101 again, and the data measured by the pressure sensor 2 and displayed on the blood pressure display device 3 becomes the blood pressure at the tip of the intravascular catheter 101 again.
When factors influencing the smoothness, such as air bubbles, thrombus and the like exist in the invasive blood pressure measuring pipeline, the time for establishing pressure transmission between perfusate in the liquid pipeline of the pressure sensor 2 and blood at the tip of the intravascular catheter 101 is longer than the condition of the smoothness of the pipeline, so that the difference exists between the time for recovering the pressure waveform from high pressure to periodic blood pressure and the waveform change on the blood pressure display device 3, and the smoothness of the invasive blood pressure measuring pipeline can be quickly and accurately detected by interpreting the difference.
Preferably, the liquid flowing through the flow-rate regulation portion 12 also has a third flow rate, the third flow rate being greater than the second flow rate; the flow rate switching tube 122 further includes squeeze tabs 1224 located on both sides of the upper portion of the outer wall of the hollow elastic circular tube 1221.
Specifically, in the embodiment of the present application, as shown in fig. 5(a), the flow rate switching tube 122 further includes pressing pieces 1224 symmetrically disposed on two sides of the upper portion of the outer wall of the hollow elastic circular tube 1221, and the hollow elastic circular tube 1221 is pressed toward the middle portion of the flow rate switching tube 122 by pinching the pressing pieces 1224, so that a liquid flow channel is formed between the inner wall of the hollow elastic circular tube 1221 and the outer wall of the microporous tube 121, and at this time, the perfusion solution passes through the first micropores 1211 and the second micropores 1212 as well as the liquid flow channel between the inner wall of the hollow elastic circular tube 1221 and the outer wall of the microporous tube 121, and passes through the flow rate adjusting portion 12 at the third flow rate. The third flow velocity is much greater than the second flow velocity, and the third flow velocity can be used for flushing the infusion pipeline 4 before invasive blood pressure measurement so as to remove air bubbles existing in the infusion pipeline 4.
The flow rate adjusting device 1 and the invasive blood pressure measuring apparatus of the embodiment of the present application set two micropores of the microporous tube 121, the microporous tube 121 is axially limited by the first liquid pipeline 111 and the second liquid pipeline 131, and the second micropore 1212 is switched between the liquid flowing state and the closed state by pulling and releasing the axial push-pull portion 1223, so that the liquid flowing through the flow rate adjusting device 1 is further switched between the second flow rate and the first flow rate, thereby causing the conversion of the liquid pressure waveform obtained by the pressure sensor 2. The flow velocity adjusting device 1 of the embodiment of the application can keep the stability of the second flow velocity, and solves the problem of inconsistent liquid pressure intensity waveforms caused by unstable state when the existing flow velocity adjusting device lifts the lifting part; the embodiment of the application also solves the problem that the smoothness detection of the invasive blood pressure measuring pipeline cannot be carried out due to the fact that the lifting part is easy to be broken; meanwhile, the pulling axial push-pull part 1223 is more convenient and faster than the existing operation of pulling up the pulling part, and is favorable for more conveniently detecting the patency of the invasive blood pressure measurement pipeline.
Another aspect of this embodiment still provides an invasive blood pressure measurement equipment, can detect the patency of invasive blood pressure measurement pipeline under the state of carrying out invasive blood pressure measurement to the patient, including infusion pipeline 4, pressurizable infusion bag 6, perfusion ware 5, pressure sensor 2, blood pressure display device 3, zero calibration three way valve 8, three way valve 9, puncture joint 10 and intravascular catheter 101, still include flow rate adjusting device 1.
Specifically, the invasive blood pressure measuring equipment that this embodiment provided is as shown in fig. 2, but including infusion pipeline 4, pressor infusion bag 6, perfusion ware 5, pressure sensor 2, blood pressure display device 3, zero calibration three way valve 8, three way valve 9 and puncture joint 10, still include flow rate adjusting device 1, through the patency as shown in fig. 14 flow detection invasive blood pressure measuring pipeline:
s1: pulling the axial push-pull part towards the second connecting part and keeping for a period of time;
s2: reading a pressure waveform at the second flow rate measured by the pressure sensor from the blood pressure display device;
s3: loosening the axial push-pull part;
s4: reading a pressure waveform at the first flow rate measured by the pressure sensor from a blood pressure display device;
s5: and judging the patency of the pipeline of the invasive blood pressure measuring equipment according to the state of the liquid pressure waveform at the second flow rate converted into the liquid pressure waveform at the first flow rate.
Specifically, the assembling manner of the flow rate adjusting device 1, the internal liquid circulation condition, and the liquid pressure condition measured by the pressure sensor in the invasive blood pressure measuring state and the invasive blood pressure measuring tube smoothness detecting state of the present embodiment have been described in detail previously, and are not described herein again.
Fig. 15(a) shows a waveform transition diagram of the liquid pressure when the invasive blood pressure measuring tube of the present embodiment maintains good patency, and fig. 15(b) shows a waveform transition diagram of the liquid pressure when there are factors affecting the patency of the tube, such as air bubbles and thrombus, in the invasive blood pressure measuring tube of the present embodiment.
When the measurement pipeline maintains better patency, when the steps S1 to S4 are executed, the liquid pressure in the liquid pipeline of the pressure sensor 2 is rapidly changed from keeping consistent with the liquid pressure in the infusion pipeline 4 at one end of the perfusion unit 5 to keeping consistent with the blood pressure at the tip of the intravascular catheter 101, correspondingly, the waveform displayed on the blood pressure display device 3 presents a steep falling edge, and then the periodically changed blood pressure waveform is recovered; when air bubbles and thrombus exist in the measuring pipeline, the smoothness of the measuring pipeline is influenced, so that the pressure transmission time is prolonged, correspondingly, the time for restoring the liquid pressure in the liquid pipeline of the pressure sensor 2 to be consistent with the blood pressure at the tip of the intravascular catheter 101 is prolonged, the waveform displayed on the blood pressure display device 3 presents a slow falling edge, and then the periodically changed blood pressure waveform is restored. And judging the patency of the invasive blood pressure measuring pipeline by analyzing the state of the conversion from the liquid pressure waveform at the second flow rate to the liquid pressure waveform at the first flow rate.
While the present invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof as defined in the appended claims.
Claims (10)
1. The utility model provides a flow rate adjusting device for adjust the liquid flow rate that flows through the infusion pipeline of invasive blood pressure measuring equipment, including first connecting portion, flow rate adjusting part and second connecting portion, first connecting portion, flow rate adjusting part and second connecting portion have the liquid circulation pipeline of intercommunication, its characterized in that:
the flow rate adjusting part comprises a cylindrical microporous tube and a flow rate switching tube wrapping the microporous tube, and the microporous tube is provided with a first micropore and a second micropore;
the liquid flowing through the flow rate adjusting portion has a first flow rate for performing invasive blood pressure measurement and a second flow rate for detecting patency of an invasive blood pressure measurement line, the second flow rate being greater than the first flow rate.
2. A flow rate regulating device as claimed in claim 1, wherein:
the first flow rate is 2 to 4 ml/hr and the second flow rate is 10 to 60 ml/min.
3. A flow rate regulating device as claimed in claim 2, wherein:
the micropore pipe is made of a hard material, and the flow speed switching pipe is made of an elastic soft material.
4. A flow rate regulating device as claimed in claim 3, wherein:
the first micropore is positioned at the radial center of the micropore pipe and penetrates through the micropore pipe along the axial direction;
the second micro-hole has a first opening located at an upper side of an outer wall of the micro-hole tube and a second opening located at an upper portion of a cross section of the micro-hole tube toward one end of the second connection portion.
5. A flow rate regulating device as claimed in claim 4, wherein:
the flow rate switching pipe comprises a hollow elastic round pipe, annular sealing parts positioned at two ends of the hollow elastic round pipe and an axial push-pull part positioned at the upper part of the outer wall of the hollow elastic round pipe;
the hollow elastic round pipe is wrapped on the microporous pipe in an interference fit mode, and the inner wall of the hollow elastic round pipe covers the first opening towards the outer edge of one end of the first connecting part;
the annular sealing part is formed by extending two ends of the hollow elastic circular tube along the axial direction, and the diameter of the inner wall of the annular sealing part is larger than that of the outer wall of the microporous tube.
6. A flow rate regulating device as claimed in claim 5, wherein:
the first connecting part comprises a first liquid pipeline, a first truncated cone-shaped protruding part, a first sealing groove, a first flow guide groove, a first limiting part and a pipeline joint, the first truncated cone-shaped protruding part is located on the first liquid pipeline and extends axially towards one end of the flow speed adjusting part, the first sealing groove is located on the outer side of the first truncated cone-shaped protruding part, the first flow guide groove is located on the upper portion, towards one end of the flow speed adjusting part, of the first liquid pipeline and the upper portion of the first truncated cone-shaped protruding part, the first limiting part is located on the lower portion of the first liquid pipeline, and the pipeline joint is located on one end, away from the flow speed adjusting part, of the first liquid pipeline;
the second connecting part comprises a second liquid pipeline, a second truncated cone-shaped protruding part, a second sealing groove, a second diversion groove and a second limiting part, the second truncated cone-shaped protruding part is located on the second liquid pipeline and extends axially towards one end of the flow speed adjusting part, the second sealing groove is located on the outer side of the second truncated cone-shaped protruding part, the second diversion groove is located on the upper portion, towards one end of the flow speed adjusting part, of the second liquid pipeline and the upper portion of the second truncated cone-shaped protruding part, and the second limiting part is located on the lower portion of the second liquid pipeline;
the diameter of the inner wall of the first liquid pipeline is smaller than that of the outer wall of the microporous pipe, and the diameter of the inner wall of the first truncated cone-shaped protruding part is larger than that of the outer wall of the microporous pipe;
the diameter of the inner wall of the second liquid pipeline is smaller than that of the outer wall of the microporous pipe, and the diameter of the inner wall of the second round platform-shaped protruding portion is larger than that of the outer wall of the microporous pipe.
7. A flow rate regulating device as claimed in claim 6, wherein:
the first sealing groove and the second sealing groove are in sealing connection with the annular sealing part through interference fit, and the bottom surfaces of the first sealing groove and the second sealing groove are in non-fixed contact with the end surface of the annular sealing part;
the first limiting part and the second limiting part are detachably and fixedly connected;
the end face of the first liquid pipeline facing one end of the flow speed adjusting part and the end face of the second liquid pipeline facing one end of the flow speed adjusting part are in non-fixed contact with the end faces of the two ends of the microporous pipe.
8. A flow rate regulating device as claimed in claim 7, wherein:
the first connecting part is communicated with a transfusion pipeline of the blood pressure measuring equipment through a pipeline joint;
the second connecting part is fixedly connected with a pressure sensor of the blood pressure measuring equipment, and the second liquid pipeline is communicated with the liquid pipeline of the pressure sensor.
9. A flow rate regulating device according to any one of claims 5 to 8, wherein:
the liquid flowing through the flow-rate regulation portion further has a third flow rate, the third flow rate being greater than the second flow rate;
the flow rate switching tube also comprises extrusion sheets positioned on two sides of the upper part of the outer wall of the hollow elastic circular tube.
10. The utility model provides an invasive blood pressure measuring equipment can detect the patency of invasive blood pressure measurement pipeline under the state of carrying out invasive blood pressure measurement to the patient, including infusion pipeline, infusion bag, perfusion ware, pressure sensor, blood pressure display device, zero-checking tee bend valve, puncture joint and intravascular catheter, its characterized in that:
further comprising a flow rate regulating device as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111050143.XA CN113598738A (en) | 2021-09-08 | 2021-09-08 | Flow velocity adjusting device and invasive blood pressure measuring equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111050143.XA CN113598738A (en) | 2021-09-08 | 2021-09-08 | Flow velocity adjusting device and invasive blood pressure measuring equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113598738A true CN113598738A (en) | 2021-11-05 |
Family
ID=78342835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111050143.XA Pending CN113598738A (en) | 2021-09-08 | 2021-09-08 | Flow velocity adjusting device and invasive blood pressure measuring equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113598738A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113598739A (en) * | 2021-09-08 | 2021-11-05 | 山东柏新医疗制品有限公司 | Pipeline patency detection device and method |
-
2021
- 2021-09-08 CN CN202111050143.XA patent/CN113598738A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113598739A (en) * | 2021-09-08 | 2021-11-05 | 山东柏新医疗制品有限公司 | Pipeline patency detection device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5454374A (en) | Pressure-measuring method and needle system for hemodialysis | |
| US4901731A (en) | Single sensor pressure differential device | |
| CN110996764B (en) | Catheter for monitoring intra-abdominal pressure | |
| US4192303A (en) | Flow regulating device for arterial catheter systems | |
| US7285097B2 (en) | Technique to confirm correct positioning with respect to arterial wall | |
| US4267835A (en) | Medical flushing valve | |
| US4278083A (en) | Flow regulating device for arterial catheter systems | |
| US4245636A (en) | Continuous flushing apparatus | |
| US20150112210A1 (en) | Lumen based pressure measurement guide wire system for measuring pressure in a body lumen | |
| US5687718A (en) | Device for continuously detecting blood parameters | |
| EP2598015B1 (en) | Endoscopic pressure detection assembly | |
| CN215534337U (en) | Flow velocity adjusting device and invasive blood pressure measuring equipment | |
| US3720201A (en) | Disposable body fluid pressure monitor | |
| WO2006060248A3 (en) | Pressure and temperature monitoring balloon catheter | |
| JPH04269938A (en) | Zero-point readjusting apparatus and method for vital internal pressure sensor | |
| US20070265550A1 (en) | Venous-Arterial Detector and Pressure Indicator | |
| US4337770A (en) | Flow regulating device for arterial catheter systems | |
| CN113598738A (en) | Flow velocity adjusting device and invasive blood pressure measuring equipment | |
| US20100094113A1 (en) | Hemodynamic monitoring during automated measurement of blood constituents | |
| CN216060487U (en) | Pipeline patency detection device | |
| CN210300989U (en) | Pressure detection device and arteriovenous internal fistula blood vessel function monitoring device | |
| CN215687804U (en) | Perfusion valve of invasive blood pressure measurement pipeline | |
| CN113598739A (en) | Pipeline patency detection device and method | |
| GB2519512A (en) | Pleural manometry catheter | |
| JP6472487B2 (en) | Steel tube with measuring element |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |