A sample injection device for manual Wei's erythrocyte sedimentation rate

Abstract

A sample injection device for manual Westergren's sedimentation rate test relates to the field of medical devices, and includes: an erythrocyte sedimentation tube positioning unit and a negative pressure unit. The erythrocyte sedimentation tube positioning unit is used to install the erythrocyte sedimentation tube, one end of which is connected to the erythrocyte sedimentation tube positioning unit; the negative pressure unit is used to generate a negative pressure corresponding to the amount of sample absorbed, and the negative pressure is transmitted to the other end of the erythrocyte sedimentation tube through one end of the erythrocyte sedimentation tube connected to the positioning component to absorb the sample into the erythrocyte sedimentation tube. The erythrocyte sedimentation tube is installed through the erythrocyte sedimentation tube positioning unit, one end of which is connected to the erythrocyte sedimentation tube positioning unit; the negative pressure unit is used to generate a negative pressure corresponding to the amount of sample absorbed, so as to avoid the problem that the amount of sample taken out is too large, and the amount of sample is too large due to excessive negative pressure, and even exceeds the amount of sample in the erythrocyte sedimentation tube to enter the ear washing bulb and cause contamination, and the problem that the negative pressure is insufficient and causes low efficiency.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to a sample injection device for manual Westergren's sedimentation rate measurement. Background Art

[0002] Traditional manual sampling of Westergren's ESR samples is mostly done manually, and the operation process mainly includes manually mixing the specimen, placing the Westergren's ESR tube into the specimen, and using an ear bulb at the upper end to generate negative pressure to suck the specimen. The amount of the specimen is controlled by manual feel, and the control scale line is at 0 mm. The accuracy is confirmed manually, but this operation method causes too large an error in the amount of the sample taken out, and the manual sampling process is controlled by the negative pressure generated by the ear bulb. Excessive negative pressure causes more sample to enter the ear bulb, even exceeding the ESR tube, causing contamination. Insufficient negative pressure means insufficient sample volume, and the sample in the ESR tube needs to be squeezed out and re-sampled, resulting in low efficiency. Summary of the invention

[0003] (I) Purpose of application

[0004] In view of this, the purpose of the present application is to provide a sample injection device for manual Westergren's sedimentation rate test, so as to solve the problems that the amount error of the sample taken out in the prior art is too large, and the manual sampling process is controlled by the negative pressure generated by the ear washing bulb. The negative pressure is too large, causing the amount of sample to exceed the ESR tube and enter the ear washing bulb, causing contamination. The negative pressure is not enough, the amount of sample is insufficient, and the sample in the ESR tube needs to be squeezed out and re-sampled, resulting in low efficiency.

[0005] (II) Technical solution

[0006] The present application discloses a sample injection device for manual Westergren's sedimentation test, comprising: an erythrocyte sedimentation tube positioning unit and a negative pressure unit, wherein the erythrocyte sedimentation tube positioning unit is used to install the erythrocyte sedimentation tube, one end of which is connected to the erythrocyte sedimentation tube positioning unit; the negative pressure unit is used to generate a negative pressure corresponding to the amount of sample sucked, and the negative pressure is transmitted to the other end of the erythrocyte sedimentation tube through one end of the erythrocyte sedimentation tube connected to the positioning component to suck the sample into the erythrocyte sedimentation tube.

[0007] In a possible implementation, the ESR tube positioning unit includes a shell and a connecting assembly, wherein the connecting assembly is disposed in the shell, and when the ESR tube is inserted into the connecting assembly, the connecting assembly is sealed and connected to the ESR tube.

[0008] In a possible embodiment, the connecting assembly includes a sealing member and a pressing tube; the sealing member includes a through tube and a sealing ring, the sealing ring is arranged along the circumference of the through tube, the through tube is connected to the trachea, when the erythrocyte sedimentation tube is inserted, the sealing ring is connected and sealed with the erythrocyte sedimentation tube, the through tube is inserted into the erythrocyte sedimentation tube, and the trachea transfers the negative pressure to the erythrocyte sedimentation tube through the through tube; the pressing tube includes an elastic pressing sheet, the erythrocyte sedimentation tube passes through the pressing tube, and the elastic pressing sheet of the pressing tube can be radially gathered along the erythrocyte sedimentation tube and connected to the erythrocyte sedimentation tube, so that the position of the erythrocyte sedimentation tube, the sealing member and the trachea are relatively fixed.

[0009] In a possible embodiment, the shell is provided with a sealing chamber and an erythrocyte sedimentation tube insertion hole, and the erythrocyte sedimentation tube insertion hole and the sealing chamber are connected; the sealing ring of the seal is arranged in the sealing chamber, and when the erythrocyte sedimentation tube is inserted and connected with the seal, the seal is in contact with the inner wall of the sealing chamber, providing a reverse force for the seal.

[0010] In a possible embodiment, the pressing tube is arranged axially along the insertion hole of the erythrocyte sedimentation tube. When the erythrocyte sedimentation tube is connected to the sealing ring, the elastic pressing piece of the pressing tube moves toward the sealing chamber, and the elastic pressing piece is radially contracted to connect with the erythrocyte sedimentation tube, so that the erythrocyte sedimentation tube and the sealing ring are relatively fixed. When the erythrocyte sedimentation tube is separated from the sealing ring, the elastic pressing piece of the pressing tube moves away from the sealing chamber, and the elastic pressing piece opens radially to separate the erythrocyte sedimentation tube from the sealing ring.

[0011] In a possible embodiment, the erythrocyte sedimentation tube insertion hole includes a large end and a small end, and the erythrocyte sedimentation tube insertion hole is in a truncated cone shape, wherein the small end is connected to the sealing chamber, and when the elastic pressing piece of the pressing tube moves toward the sealing chamber, the elastic pressing piece is radially contracted and connected to the erythrocyte sedimentation tube due to the increase of force acting on the inner wall of the erythrocyte sedimentation tube, and when the elastic pressing piece of the pressing tube moves away from the sealing chamber, the force acting on the inner wall of the erythrocyte sedimentation tube against the elastic pressing piece decreases, and the elastic pressing piece opens radially to separate the pressing tube from the erythrocyte sedimentation tube.

[0012] In a possible embodiment, the erythrocyte sedimentation tube positioning unit also includes a connecting rod, which connects the seal and the pressure tube. The seal can move horizontally in the seal chamber. When the erythrocyte sedimentation tube is inserted and contacts the seal and moves horizontally, the connecting rod drives the pressure tube to move horizontally so that the elastic pressure plate of the pressure tube moves horizontally toward the seal chamber, and the elastic pressure plate is radially contracted and connected to the erythrocyte sedimentation tube.

[0013] In a possible implementation manner, the housing is provided with a connecting rod sliding hole and a trachea insertion hole, and the trachea insertion hole is provided on the other side of the sealing member chamber relative to the erythrocyte sedimentation tube insertion hole.

[0014] In a possible embodiment, the negative pressure unit includes a controller, a negative pressure buffer chamber, a micro vacuum pump and a sensor, wherein the sensor is used to detect whether the sample volume in the erythrocyte sedimentation tube reaches a preset value and generate a signal that the preset value has been reached; the controller collects the signal from the sensor that the preset value has been reached, controls the micro vacuum pump and the negative pressure buffer chamber to stop increasing the negative pressure, and stops the sample volume in the erythrocyte sedimentation tube from increasing.

[0015] In one possible embodiment, the negative pressure unit includes a controller, a negative pressure buffer chamber and a micro-vacuum pump. The controller can receive parameters for controlling the sample injection volume, wherein the parameters include time parameters and injection volume parameters. The working states of the micro-vacuum pump and the negative pressure buffer chamber are determined by the injection volume parameters and the time parameters.

[0016] (III) Beneficial effects

[0017] The erythrocyte sedimentation tube is installed through the erythrocyte sedimentation tube positioning unit, and one end of the erythrocyte sedimentation tube is connected to the erythrocyte sedimentation tube positioning unit; the negative pressure unit is used to generate negative pressure corresponding to the amount of sample absorbed, so as to avoid excessive error in the amount of sample taken out, excessive negative pressure causing more sample to enter the ear washing bulb and cause contamination due to even exceeding the amount of the erythrocyte sedimentation tube, and insufficient negative pressure causing low efficiency.

[0018] Other advantages, objectives and features of the present application will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and study, or can be taught from the practice of the present application to some extent. The objectives and other advantages of the present application can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain and illustrate the present application, but should not be construed as limiting the scope of protection of the present application.

[0020] Figure 1 is a structural diagram of this application;

[0021] Figure 2 This is a structural diagram of the erythrocyte sedimentation tube positioning unit of the present application;

[0022] Figure 3 is a cross-sectional view of the shell of this application;

[0023] Figure 4 It is the structural diagram of the seal of this application;

[0024] Figure 5 It is the compression pipe structure diagram of this application;

[0025] Wherein: 1. ESR tube positioning unit; 2. outer shell; 3. ESR tube; 4. sensor; 11. shell; 12. trachea; 13. seal; 14. pressure tube; 15. connecting rod; 111. connecting rod sliding hole; 112. seal chamber; 113. ESR tube insertion hole; 114. trachea insertion hole; 131. through pipe; 132. sealing ring; 141. elastic pressing piece; 142. toggle block. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the above description of the present application, it should be noted that the terms "one side", "the other side", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0030] In addition, the term "same" does not mean that the parts must be absolutely the same, but slight differences are allowed. The term "vertical" only means that the positional relationship between the parts is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0031] like Figure 1As shown, this embodiment provides a sample injection device for manual Westergren's sedimentation rate, including: an erythrocyte sedimentation tube positioning unit 1, a negative pressure unit and a shell 2; the erythrocyte sedimentation tube positioning unit is used to install an erythrocyte sedimentation tube 3, one end of which is connected to the erythrocyte sedimentation tube positioning unit; the negative pressure unit is used to generate a negative pressure corresponding to the amount of sample sucked, and the negative pressure is transmitted to the other end of the erythrocyte sedimentation tube through one end of the erythrocyte sedimentation tube connected to the positioning component to suck the sample into the erythrocyte sedimentation tube; the erythrocyte sedimentation tube is arranged on the outer wall of the shell, and the negative pressure unit is arranged inside the shell.

[0032] Install the ESR tube on the ESR tube positioning unit, turn on the negative pressure unit to generate negative pressure to suck the sample into the ESR tube, and when the sample in the ESR tube reaches the preset position, the negative pressure unit maintains the negative pressure unchanged so that the sample in the ESR tube no longer increases.

[0033] The erythrocyte sedimentation tube positioning unit includes a shell 11 and a connecting component, which is arranged in the shell. When the erythrocyte sedimentation tube is inserted into the connecting component, the connecting component is sealed and connected to the erythrocyte sedimentation tube; the connecting component includes a sealing member 13 and a pressure tube 14; the sealing member is connected to the trachea, and when the trachea is connected to the erythrocyte sedimentation tube, the sealing member seals the trachea and the erythrocyte sedimentation tube to avoid air pressure leakage; the sealing member includes a through pipe 131 and a sealing ring 132, the sealing ring is arranged along the circumference of the through pipe, the through pipe is connected to the trachea 12, the trachea is used to be connected to the negative pressure unit, when the erythrocyte sedimentation tube is inserted, the sealing ring is connected to the erythrocyte sedimentation tube and sealed, the through pipe is inserted into the erythrocyte sedimentation tube, the trachea transmits the negative pressure to the erythrocyte sedimentation tube through the through pipe, when the erythrocyte sedimentation tube is inserted into the negative pressure unit, After the sedimentation tube is sealed and connected with the trachea, the pressing tube fixes the erythrocyte sedimentation tube and the trachea relatively. The pressing tube includes an elastic pressing piece 141 and a toggle block 142. The toggle block is used to manually toggle to change the state between the pressing tube and the erythrocyte sedimentation tube. The erythrocyte sedimentation tube passes through the pressing tube. The elastic pressing piece of the pressing tube can be retracted along the radial direction of the erythrocyte sedimentation tube and connected to the erythrocyte sedimentation tube so that the position of the erythrocyte sedimentation tube, the sealing member and the trachea are relatively fixed; the shell is provided with a sealing member chamber 112 and an erythrocyte sedimentation tube insertion hole 113, and the erythrocyte sedimentation tube insertion hole and the sealing member chamber are connected; the sealing ring of the sealing member is arranged in the sealing member chamber, and when the erythrocyte sedimentation tube is inserted and connected with the sealing member, the sealing member contacts the inner wall of the sealing member chamber to provide a reverse force for the sealing member; the pressing tube is pressed along the erythrocyte sedimentation tube. The tube insertion hole is axially arranged. When the erythrocyte sedimentation tube is connected to the sealing ring, the elastic pressing piece of the pressing tube moves horizontally toward the sealing chamber, and the elastic pressing piece contracts radially to connect with the erythrocyte sedimentation tube, so that the pressing tube and the erythrocyte sedimentation tube are relatively fixed, and the erythrocyte sedimentation tube and the sealing ring are relatively fixed. When the erythrocyte sedimentation tube is separated from the sealing ring, the elastic pressing piece of the pressing tube moves horizontally away from the sealing chamber, and the elastic pressing piece opens radially to separate the pressing tube from the erythrocyte sedimentation tube. The erythrocyte sedimentation tube insertion hole includes a large end and a small end, and the erythrocyte sedimentation tube insertion hole is in a truncated cone shape, wherein the small end is connected to the sealing chamber, and when the elastic pressing piece of the pressing tube moves horizontally toward the sealing chamber, the elastic pressing piece is increased by the force of the inner wall of the erythrocyte sedimentation tube when the erythrocyte sedimentation tube insertion hole gradually shrinks. The ESRT tube is radially folded and connected to the ESRT tube. When the elastic pressing piece of the pressing tube moves away from the sealing chamber, the elastic pressing piece is reduced by the force of the inner wall of the ESRT tube, and the elastic pressing piece opens radially to separate the ESRT tube from the sealing ring. The ESRT tube positioning unit also includes a connecting rod 15, which connects the sealing element and the pressing tube. The sealing element can move horizontally in the sealing chamber. When the ESRT tube is inserted and contacts the sealing element and moves horizontally, the connecting rod drives the pressing tube to move horizontally so that the elastic pressing piece of the pressing tube moves horizontally toward the sealing chamber. The elastic pressing piece is radially folded and connected to the ESRT tube, avoiding the need to seal the ESRT tube against the sealing element while pressing the pressing tube toward the sealing chamber to connect the ESRT tube during manual operation. The housing is provided with a connecting rod sliding hole 111 and a trachea insertion hole 114. The trachea insertion hole is provided on the other side of the sealing chamber relative to the ESRT tube insertion hole. The connecting rod is inserted into the connecting rod sliding hole to make the structure more compact.

[0034] The negative pressure unit includes a controller, a negative pressure buffer cavity, a micro vacuum pump and a sensor 4, wherein the sensor is used to detect whether the sample volume in the erythrocyte sedimentation tube has reached a preset value and generate a signal that the preset value has been reached; the controller collects the signal of the sensor reaching the preset value, controls the micro vacuum pump and the negative pressure buffer cavity to stop increasing the negative pressure, and stops the sample volume in the erythrocyte sedimentation tube from increasing, wherein the parameter used by the micro vacuum pump is 10-25ml / min. The specific working process is to press the start button, the micro vacuum pump starts to work, and the peristaltic characteristics of the micro vacuum pump are equalized after being buffered by the negative pressure buffer cavity, and then act on the Wei's erythrocyte sedimentation tube. The sample slowly rises to the sensor position under the action of negative pressure. When the sensor position detects the blood sample, the micro vacuum pump stops working and the sample injection ends. The negative pressure unit may include a controller, a negative pressure buffer chamber and a micro vacuum pump. The controller can receive parameters for controlling the sample injection volume, such as time parameters and injection volume parameters. The working states of the micro vacuum pump and the negative pressure buffer chamber are determined by the injection volume parameters and time parameters, thereby achieving the purpose of reducing sensors. The sample injection volume can also be adjusted according to parameter changes.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present application, which should be included in the scope of the claims of the present application.

Claims

1. A sample injection device for manual Westergren's sedimentation rate, characterized in that: include: The erythrocyte sedimentation tube positioning unit and the negative pressure unit, wherein the erythrocyte sedimentation tube positioning unit is used to install the erythrocyte sedimentation tube, one end of which is connected to the erythrocyte sedimentation tube positioning unit; the negative pressure unit is used to generate a negative pressure corresponding to the amount of sample sucked, and the negative pressure is transmitted to the other end of the erythrocyte sedimentation tube through one end of the erythrocyte sedimentation tube connected to the positioning component to suck the sample into the erythrocyte sedimentation tube; The erythrocyte sedimentation tube positioning unit comprises a housing and a connecting assembly, wherein the connecting assembly is arranged in the housing, and when the erythrocyte sedimentation tube is inserted into the connecting assembly, the connecting assembly is sealed and connected to the erythrocyte sedimentation tube; The connecting assembly includes a sealing member and a pressing tube; the sealing member includes a through tube and a sealing ring, the sealing ring is arranged along the circumference of the through tube, the through tube is communicated with the trachea, when the erythrocyte sedimentation tube is inserted, the sealing ring is butted and sealed with the erythrocyte sedimentation tube, the through tube is inserted into the erythrocyte sedimentation tube, the trachea transmits negative pressure to the erythrocyte sedimentation tube through the through tube, and when the erythrocyte sedimentation tube is sealed and connected with the trachea, the pressing tube fixes the erythrocyte sedimentation tube and the trachea relatively; the pressing tube includes an elastic pressing piece and a toggle block, the toggle block is used to manually toggle to change the state between the pressing tube and the erythrocyte sedimentation tube, the erythrocyte sedimentation tube passes through the pressing tube, the elastic pressing piece of the pressing tube can be gathered along the radial direction of the erythrocyte sedimentation tube to connect with the erythrocyte sedimentation tube, so that the position of the erythrocyte sedimentation tube, the sealing member and the trachea are relatively fixed; The housing is provided with a sealing chamber and an erythrocyte sedimentation tube insertion hole, and the erythrocyte sedimentation tube insertion hole is connected to the sealing chamber; the sealing ring of the sealing member is arranged in the sealing chamber, and when the erythrocyte sedimentation tube is inserted and connected with the sealing member, the sealing member abuts against the inner wall of the sealing chamber, providing a reverse force for the sealing member; The pressing tube is arranged axially along the insertion hole of the erythrocyte sedimentation tube. When the erythrocyte sedimentation tube is connected to the sealing ring, the elastic pressing piece of the pressing tube moves toward the sealing chamber, and the elastic pressing piece is radially contracted to connect with the erythrocyte sedimentation tube, so that the erythrocyte sedimentation tube and the sealing ring are relatively fixed. When the erythrocyte sedimentation tube is separated from the sealing ring, the elastic pressing piece of the pressing tube moves away from the sealing chamber, and the elastic pressing piece opens radially to separate the erythrocyte sedimentation tube from the sealing ring. The ESR tube insertion hole comprises a large end and a small end, and the ESR tube insertion hole is in a truncated cone shape, wherein the small end is connected to the sealing chamber, and when the elastic pressing piece of the pressing tube moves toward the sealing chamber, the elastic pressing piece is radially contracted by the increased force of the inner wall of the ESR tube and connected to the ESR tube, and when the elastic pressing piece of the pressing tube moves away from the sealing chamber, the force of the inner wall of the ESR tube on the elastic pressing piece decreases, and the elastic pressing piece opens radially to separate the pressing tube from the ESR tube; The erythrocyte sedimentation tube positioning unit also includes a connecting rod, which connects the sealing member and the pressing tube. The sealing member can move horizontally in the sealing member chamber. When the erythrocyte sedimentation tube is inserted and contacts the sealing member and moves horizontally, the connecting rod drives the pressing tube to move horizontally so that the elastic pressing piece of the pressing tube moves horizontally toward the sealing member chamber. The elastic pressing piece is radially contracted and connected to the erythrocyte sedimentation tube.

2. A sample injection device for manual Westergren sedimentation rate according to claim 1, characterized in that: The shell is provided with a connecting rod sliding hole and a trachea insertion hole, and the trachea insertion hole is arranged on the other side of the sealing member chamber relative to the erythrocyte sedimentation tube insertion hole.

3. A sample injection device for manual Westergren sedimentation rate according to claim 1, characterized in that: The negative pressure unit includes a controller, a negative pressure buffer chamber, a micro vacuum pump and a sensor, wherein the sensor is used to detect whether the sample volume in the erythrocyte sedimentation tube has reached a preset value and generate a signal that the preset value has been reached; the controller collects the signal from the sensor that the preset value has been reached, controls the micro vacuum pump and the negative pressure buffer chamber to stop increasing the negative pressure, and stops the sample volume in the erythrocyte sedimentation tube from increasing.

4. A sample injection device for manual Westergren sedimentation rate according to claim 1, characterized in that: The negative pressure unit includes a controller, a negative pressure buffer chamber and a micro vacuum pump. The controller can receive parameters for controlling the sample injection volume, and the parameters include time parameters and injection volume parameters. The working states of the micro vacuum pump and the negative pressure buffer chamber are determined by the injection volume parameters and time parameters.

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