CN214965628U - Centrifugal blood collection tube - Google Patents

Abstract

The utility model discloses a centrifugal heparin tube, the heparin tube includes pipe body, tube cap, piston and undergauge part, the pipe body is open-ended blind column structure, the central point of tube cap puts the department and has seted up the piston mounting hole, and this tube cap is sealed and is connected on the open-ended of pipe body, the piston is arranged in the mounting hole of tube cap, the undergauge part sets up this internal middle section position department of pipe reduces with corresponding the bore of this internal middle section position department of pipe forms one section isometric undergauge passageway promptly. The utility model is not only simple in operation, with low costs, infant and blood vessel thin excessively moreover, large tracts of land burn, blood circulation be not good etc. this type of patient can only gather a small amount of blood samples, also can gather check-out set (indicate the equipment of inspection supernatant, lower with) direct action in the supernatant that the heparin tube just can inspect after the centrifugation.

Description

Centrifugal blood collection tube

Technical Field

The utility model relates to the technical field of medical equipment, in particular to centrifugal heparin tube.

Background

Chinese patent literature discloses a vacuum blood collection tube for detecting the expression level of miRNA in liver cancer (patent number CN207619398U, published as 2018.07.17), which is internally provided with a drainage structure and a liquid stopping component. The vacuum blood collection tube is internally divided into an upper cavity and a lower cavity, and respectively holds supernatant and turbid liquid separated after centrifugation, and the vacuum blood collection tube ensures that the tubes are sealed in a centrifugal state through a liquid stopping part arranged in a drainage structure of the vacuum blood collection tube. From this, can directly be used for centrifugal processing with the vacuum test tube to direct once only realize subsequent supernatant extraction, separation, divide liquid etc. operation in cooperation with corresponding minute liquid connecting device after handling. The utility model discloses a set up two cavitys and hold the supernatant and the turbid liquid down of centrifugation after-separation respectively in the vacuum test tube, can make things convenient for follow-up separation operation to the centrifugation material, effectively improved the efficiency of drawing plasma RNA in the detection of liver cancer miRNA expression level. The design of this patent document needs freezing in centrifugal process, and follow-up still need connect and divide liquid connecting device etc. and on the one hand, the whole process cost height that realizes dividing liquid, and on the other hand freezing has certain adverse effect to subsequent testing result.

Disclosure of Invention

The utility model aims to provide a: aiming at the defects of the prior art, the supernatant which is not only simple to operate and low in cost, but also can be used for collecting a small amount of blood samples for infants and patients with too thin blood vessels, large-area burns, poor blood circulation and the like, and can be used for directly acting on a blood collection tube to test after centrifugation.

The technical scheme of the utility model is, the first aspect: the utility model discloses a centrifugal heparin tube, the heparin tube includes pipe body, tube cap, piston and undergauge part, the pipe body is open-ended blind column structure, the central point of tube cap puts the department and has seted up the piston mounting hole, and this tube cap is sealed and is connected on the open-ended of pipe body, the piston is arranged in the mounting hole of tube cap, the undergauge part sets up this internal middle section position department of pipe reduces with corresponding the bore of this internal middle section position department of pipe forms one section isometric undergauge passageway promptly.

Further, the reducing part is a section of annular cylinder body which is of a hollow structure and is integrally formed with the pipe body.

Further, the pipe body from top to bottom falls into upper, middle, lower three-section, and the middle section pipe body corresponds undergauge passageway, the height of upper segment pipe body: height of the middle section pipe body: the height of the lower-section pipe body is = (0.1-0.5): (2-3): 1, inner diameter of upper pipe body: inner diameter of the middle section pipe body: inner diameter of lower tube body = (2-3): 1: (2-3).

In a second aspect: the utility model discloses a centrifugal blood collection tube, the blood collection tube includes tube body, tube cap, piston and undergauge part, the tube body is the blind structure of open-ended top, the central point of tube cap puts and has seted up the piston mounting hole, and this tube cap is sealed and connects on the open-ended top of tube body, the piston is arranged in the mounting hole of tube cap, the undergauge part mainly comprises first gasbag, first air duct and sealing plug, first gasbag is the annular, lays on the internal face of middle section position department in the tube body, air duct one end mouth of pipe with first gasbag intercommunication, other end mouth of pipe stretches out from on the tube cap or the periphery wall of tube body; wherein, a pipe orifice at one end of the air duct is provided with a sealing plug; when gas or liquid is injected into the first air bag, the first air bag can be gradually expanded along the radial direction until the inner ring surface of the first air bag forms a section of reducing channel.

When the passageway of undergauge passageway is the constant diameter, the pipe body from top to bottom falls into upper, middle, lower three-section, and the middle section pipe body corresponds the undergauge passageway, the height of upper segment pipe body: height of the middle section pipe body: the height of the lower-section pipe body is = (0.1-0.5): (2-3): 1, inner diameter of upper pipe body: inner diameter of the middle section pipe body: inner diameter of lower tube body = (2-3): 1: (2-3).

In a third aspect: the utility model discloses a centrifugal blood collection tube, which comprises a tube body, a tube cover, a piston and a reducing part, wherein the tube body is of a blind structure with an opening at the top end, the central position of the tube cover is provided with a piston mounting hole, the tube cover is sealed and connected with the opening at the top end of the tube body, the piston is arranged in the mounting hole of the tube cover, the reducing part mainly comprises a first air bag, a rotary bottom shell, a second air bag and a second air duct, the first air bag is in a ring shape and is laid on the inner wall surface at the middle section position in the tube body, the rotary bottom shell is of a blind structure with an opening at the top end, the opening at the top end of the rotary bottom shell is provided with an internal thread, the peripheral wall surface at the bottom of the tube body is provided with an external thread matched with the internal thread of the rotary bottom shell, the rotary bottom shell is screwed at the bottom of the tube body, the rotary bottom shell is connected with the tube body, a containing cavity with changeable volume is formed between the rotary bottom shell and the bottom of the tube body, gas or liquid is stored in the second air bag in advance, the second air bag is arranged in the containing cavity, an orifice at one end of the second air duct is communicated with the first air bag, an orifice at the other end of the second air duct is communicated with the second air bag, the rotary bottom shell is screwed, the containing cavity can be reduced in volume, the second air bag is compressed, and the gas or liquid in the second air bag is injected into the first air bag through the second air duct, so that the first air bag is gradually expanded until the inner annular surface of the first air bag forms a section of reducing channel.

Further, when the passageway of undergauge passageway is the constant diameter, the pipe body from top to bottom falls into upper, middle, lower three-section, and the middle section pipe body corresponds the undergauge passageway, the height of upper segment pipe body: height of the middle section pipe body: the height of the lower-section pipe body is = (0.1-0.5): (2-3): 1, inner diameter of upper pipe body: inner diameter of the middle section pipe body: inner diameter of lower tube body = (2-3): 1: (2-3).

Further, the part of the second air bag positioned at the bottom of the pipe body is bonded with the pipe body.

The utility model has the advantages that:

1. the utility model is not only simple in operation, with low costs, infant and blood vessel thin excessively moreover, large tracts of land burn, blood circulation be not good etc. this type of patient can only gather a small amount of blood samples, also can gather check-out set (indicate the equipment of inspection supernatant, lower with) direct action in the supernatant that the heparin tube just can inspect after the centrifugation. Particularly, the utility model can realize the inspection of the supernatant by directly acting on the blood sampling tube by using the inspection equipment without collecting the supernatant after the centrifugal separation of the blood sample by other devices or equipment, thereby having simple operation and low cost; for traditional heparin tube, under the blood specimen condition with the equivalent, after the centrifugation goes out the supernatant, the utility model relates to a undergauge passageway, the level surface of its supernatant in heparin tube can be higher. According to this principle, the utility model discloses a heparin tube just can use to infant and blood vessel thin excessively, large tracts of land burn, blood circulation not good the class patient of waiting, even this type of patient can only gather a small amount of blood samples, still can make the liquid level height that the blood sample can directly use the heparin tube to just can carry out the liquid level height of examining through the later supernatant of centrifugal separation to reach the check out test set.

2. The utility model discloses in, through the pipe body from top to bottom falls into upper, middle and lower three-section, and the middle section pipe body corresponds the undergauge passageway, the height of upper segment pipe body: height of the middle section pipe body: the height of the lower-section pipe body is = (0.1-0.5): (2-3): 1, inner diameter of upper pipe body: inner diameter of the middle section pipe body: inner diameter of lower tube body = (2-3): 1: and (2) the design of (3) makes the design of the blood sampling tube more reasonable.

3. The utility model discloses in, through the design of first gasbag, first air duct and sealing plug, can guarantee that the internal diameter of heparin tube upper segment pipe body before the blood specimen centrifugation, the internal diameter of middle segment pipe body, the internal diameter of hypomere pipe body equal to centrifugation effect is better, can guarantee that the internal diameter of heparin tube middle segment pipe body after the blood specimen centrifugation is less than the internal diameter of upper segment pipe body, is less than the internal diameter of hypomere pipe body, thereby the effect of separation supernatant is better.

4. In the utility model, through the design of the first air bag, the rotary bottom shell, the second air bag and the second air duct, on the first hand, the first air bag is prevented from being inflated by external inflating equipment (such as an inflator) when an operator uses the blood sampling tube after centrifugation; in the second aspect, the second air bag can be gently and gradually compressed by rotating the bottom shell, so that the first air bag can also be gently and gradually expanded, and the liquid level height of the supernatant can be better controlled; in the third aspect, gas or liquid is injected into the second air bag in advance, the amount of the gas or liquid is a fixed value, the rotation of the rotary bottom case can be ensured to be completed, the gas or liquid in the second air bag is completely injected into the first air bag through the second air duct, and after the first air bag is expanded, a reducing channel formed can meet the following requirements: inner diameter of the upper tube body: inner diameter of the middle section pipe body: inner diameter of lower tube body = (2-3): 1: (2-3), need not operating personnel constantly to attend to because need be with the help of outside aeration equipment inconvenient control upper segment pipe body's internal diameter, the internal diameter of middle section pipe body, the internal diameter of lower segment pipe body ratio each other.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic structural diagram according to a first embodiment;

FIG. 2 is a schematic structural diagram of the second embodiment;

FIG. 3 is an enlarged view taken at A in FIG. 2;

fig. 4 is a schematic structural diagram of the third embodiment.

Reference numerals: 1-a tube body; 2-a first balloon; 3-lower segment tube body; 4-a first airway tube; 5, covering the tube; 6, a piston; 7-reducing the diameter of the channel; 8-bottom chamber; 9-a sealing plug; 10-a middle section pipe body; 11-a second airway tube; 12-rotating the bottom shell; 13-a second bladder; 14-upper segment pipe body.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the description of the embodiments, the terms "disposed," "connected," and the like are to be construed broadly unless otherwise explicitly specified or limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; either directly or through an intervening medium, or through internal communication between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

The technical solution of the present invention is explained in detail with reference to a plurality of embodiments.

The first embodiment is as follows:

as shown in fig. 1, the utility model discloses a centrifugal blood collection tube, its characterized in that:

the blood collection tube comprises a tube body 1, a tube cover 5, a piston 6 and a reducing part, wherein the tube body 1 is of a blind structure with an open top end, a piston mounting hole is formed in the central position of the tube cover 5, the tube cover 5 is sealed and connected onto the open top end of the tube body 1, the piston 6 is arranged in the mounting hole of the tube cover 5, and the reducing part is arranged at the middle section position in the tube body 1 to correspondingly reduce the caliber of the middle section position in the tube body 1, namely, a reducing channel 7 with the same diameter is formed. Wherein, the blood taking needle can insert pipe body 1 through piston 6 in (its in-process, piston 6 can guarantee all the time that pipe body 1 is in encapsulated situation), and after the blood taking needle was extracted from pipe body 1, piston 6 can seal again the top end opening of pipe body 1.

The first embodiment is not only simple in operation and low in cost, but also can collect a small amount of blood samples for infants and patients with too thin blood vessels, large-area burns, poor blood circulation and the like, and can also collect supernatant which can be detected by directly acting on a blood collection tube through a test device (a device for detecting supernatant, the same applies below) after centrifugation. Particularly, the utility model can realize the inspection of the supernatant by directly acting on the blood sampling tube by using the inspection equipment without collecting the supernatant after the centrifugal separation of the blood sample by other devices or equipment, thereby having simple operation and low cost; for traditional heparin tube, under the blood sample condition with the equivalent, after the centrifugation goes out the supernatant, the utility model relates to a undergauge passageway 7, the level surface of its supernatant in heparin tube can be higher. According to this principle, the utility model discloses a heparin tube just can use to infant and blood vessel thin excessively, large tracts of land burn, blood circulation not good the class patient of waiting, even this type of patient can only gather a small amount of blood samples, still can make the liquid level height that the blood sample can directly use the heparin tube to just can carry out the liquid level height of examining through the later supernatant of centrifugal separation to reach the check out test set.

Further, the reducing part is a section of annular cylinder body which is of a hollow structure and is integrally formed with the pipe body 1.

Furthermore, the tube body 1 is divided into an upper section, a middle section and a lower section from top to bottom, the middle section tube body 10 corresponds to the reducing channel 7, and the lower section tube body 3 corresponds to the bottom cavity 8 (for containing the blood sample part except the supernatant in the blood sample). Height of the upper tube body 14: height of the middle section pipe body 10: height = (0.1 to 0.5) of the lower-stage pipe body 3: (2-3): 1, for example, 0.1: 2: 1. 0.25): 2: 1 or 0.5: 3: 1, etc. Inner diameter of the upper tube body 14: inner diameter of the middle-stage pipe body 10: inner diameter = (2-3) of the lower-stage pipe body 3: 1: (2-3), for example: 2: 1: 2. 2: 1: 3. 3: 1: 2. 3: 1: 3 or 2.5: 1: 2.5, etc. Through pipe body 1 from top to bottom falls into upper, middle and lower three-section, and middle section pipe body 10 corresponds undergauge passageway 7, the height of upper segment pipe body 14: height of the middle section pipe body 10: height = (0.1 to 0.5) of the lower-stage pipe body 3: (2-3): 1, inner diameter of the upper tube body 14: inner diameter of the middle-stage pipe body 10: inner diameter = (2-3) of the lower-stage pipe body 3: 1: and (2) the design of (3) makes the design of the blood sampling tube more reasonable.

In addition, the tube body 1 and the annular cylinder are both made of transparent materials.

Example two:

as shown in fig. 2 and fig. 3, the second embodiment discloses a centrifugal blood collection tube, which includes a tube body 1, a tube cap 5, a piston 6 and a reducing member, wherein the tube body 1 is a blind structure with an open top end, a piston mounting hole is formed in the center of the tube cap 5, the tube cap 5 is hermetically connected to the open top end of the tube body 1, and the piston 6 is disposed in the mounting hole of the tube cap 5.

The reducing part mainly comprises first gasbag 2, first air duct 4 and sealing plug 9, first gasbag 2 is the annular form, lays on the internal face of the middle section position department in the pipe body 1 (the laminating is on the internal face of pipe body 1), the air duct one end mouth of pipe with first gasbag 2 intercommunication, the other end mouth of pipe is followed on the tube cap 5 or stretch out on the periphery wall of pipe body 1. Wherein, an end pipe mouth department of air duct is provided with sealing plug 9, and outside air inflation equipment's gas injection mouth can insert into gas injection in first air duct 4 through sealing plug 9 (this in-process, sealing plug 9 can keep the mouth of pipe of 4 upper end tip of first air duct sealed all the time), and the back is accomplished in the gas injection, and outside air inflation equipment extracts from sealing plug 9, and this sealing plug 9 still can seal the mouth of pipe of 4 upper end tip of first air duct.

When gas or liquid is injected into the first airbag 2, the first airbag 2 can expand gradually in the radial direction until the inner annular surface of the first airbag 2 forms a section of reduced diameter channel 7 with the same diameter (the reduced diameter channel 7 with the same diameter refers to a channel part between the upper end and the lower end of the reduced diameter channel 7, the wall thickness of the channel part is equal, the upper end and the lower end of the reduced diameter channel 7 are short, and the inner diameter value can be ignored).

In this embodiment two, through first gasbag 2, the design of first air duct 4 and sealing plug 9, can guarantee the internal diameter of upper segment pipe body 14 of heparin tube before the centrifugation of blood sample, the internal diameter of middle segment pipe body 10, the internal diameter of hypomere pipe body 3 equals, thereby centrifugal effect is better, can guarantee that the internal diameter of heparin tube middle segment pipe body 10 after the centrifugation of blood sample is less than the internal diameter of upper segment pipe body 14, be less than the internal diameter of hypomere pipe body 3, thereby the effect of separation supernatant is better.

Further, the tube body 1 is divided into an upper section, a middle section and a lower section from top to bottom, the middle section tube body 10 corresponds to the reducing channel 7, and the lower section tube body 3 corresponds to the bottom cavity 8 (for containing the blood sample part except the supernatant in the blood sample). Height of the upper tube body 14: height of the middle section pipe body 10: height = (0.1 to 0.5) of the lower-stage pipe body 3: (2-3): 1, for example, 0.1: 2: 1. 0.25): 2: 1 or 0.5: 3: 1, etc. Inner diameter of the upper tube body 14: inner diameter of the middle-stage pipe body 10: inner diameter = (2-3) of the lower-stage pipe body 3: 1: (2-3), for example: 2: 1: 2. 2: 1: 3. 3: 1: 2. 3: 1: 3 or 2.5: 1: 2.5, etc.

Through pipe body 1 from top to bottom falls into upper, middle and lower three-section, and middle section pipe body 10 corresponds undergauge passageway 7, the height of upper segment pipe body 14: height of the middle section pipe body 10: height = (0.1 to 0.5) of the lower-stage pipe body 3: (2-3): 1, inner diameter of the upper tube body 14: inner diameter of the middle-stage pipe body 10: inner diameter = (2-3) of the lower-stage pipe body 3: 1: and (2) the design of (3) makes the design of the blood sampling tube more reasonable.

In addition, the tube body 1 and the annular cylinder are both made of transparent materials. The passageway section of undergauge passageway 7 also can be the passageway of non-isodiametric, and this passageway can the undergauge raise the supernatant of blood sample can, satisfy: inner diameter of the upper tube body 14: minimum inner diameter of the middle-stage pipe body 10: inner diameter = (2.5 to 3) of the lower-stage pipe body 3: 1: (2.5-3), and the inner diameter of the upper segment pipe body 14: maximum inner diameter of the middle-stage pipe body 10: inner diameter = (2-2.5) of the lower-stage pipe body 3: 1: (2-2.5).

EXAMPLE III

As shown in fig. 4, the third embodiment discloses a centrifugal blood collection tube, which includes a tube body 1, a tube cap 5, a piston 6 and a reducing member, wherein the tube body 1 is a blind structure with an open top end, a piston mounting hole is formed in the center of the tube cap 5, the tube cap 5 is hermetically connected to the open top end of the tube body 1, and the piston 6 is disposed in the mounting hole of the tube cap 5.

The reducing part mainly comprises first air bag 2, rotatory drain pan 12, second air bag 13 and second air duct 11, first air bag 2 is the annular form, lays on the internal face of middle section position department in the pipe body 1, rotatory drain pan 12 is open-ended blind structure, and the open-end department in top of this rotatory drain pan 12 is provided with the internal thread, be provided with on the periphery wall of pipe body 1 bottom and match in the internal thread external screw thread of this rotatory drain pan 12, rotatory drain pan 12 spiro union is in pipe body 1 bottom, with rotatory drain pan 12 with form the chamber that holds that can change the volume between the pipe body 1 bottom.

The second air bag 13 is pre-stored with gas or liquid, the second air bag 13 is arranged in the containing cavity, one end of the second air duct 11 is communicated with the first air bag 2, and the other end is communicated with the second air bag 13. Wherein, the tube body of the second air duct 11 is positioned in the tube body 1.

When the second air bag 13 is not pressed by the rotating bottom case 12 (before the rotating bottom case 12 is screwed), the first air bag 2 is applied to the inner wall surface of the tube body 1. The volume of the accommodating cavity can be reduced by screwing the rotary bottom shell 12, so that the second air bag 13 is compressed, the gas or liquid in the second air bag 13 is injected into the first air bag 2 through the second air duct 11, and the first air bag 2 is gradually expanded until the inner ring surface of the first air bag 2 forms a section of reducing channel 7 with the same diameter (the reducing channel 7 with the same diameter refers to a channel part between the upper end part and the lower end part of the reducing channel 7, the inner diameter of the channel part is equal, the upper end part and the lower end part of the reducing channel 7 are short, and the inner diameter value can be ignored).

In the third embodiment, through the design of the first air cell 2, the rotary bottom shell 12, the second air cell 13 and the second air duct 11, on the first hand, it is avoided that when an operator uses the blood collection tube after centrifugation, the first air cell 2 needs to be inflated by means of external inflation equipment (e.g., an inflator, etc.); in the second aspect, the second air cell 13 can be gently and gradually compressed by rotating the bottom shell 12, so that the first air cell 2 can also be gently and gradually expanded, and the liquid level of the supernatant can be better controlled; in the third aspect, the second air cell 13 is filled with gas or liquid in advance, the amount of the gas or liquid is a fixed value, it can be ensured that the rotary bottom case 12 is completely rotated and the gas or liquid in the second air cell 13 is completely filled into the first air cell 2 through the second air duct 11, and after the first air cell 2 is expanded, the formed reducing channel 7 can satisfy: inner diameter of the upper tube body 14: inner diameter of the middle-stage pipe body 10: inner diameter = (2-3) of the lower-stage pipe body 3: 1: (2-3), the operator is not required to constantly pay attention to the fact that the ratio of the inner diameter of the upper-stage pipe body 14, the inner diameter of the middle-stage pipe body 10 and the inner diameter of the lower-stage pipe body 3 is inconvenient to control due to the need of external inflation equipment.

Further, the tube body 1 is divided into an upper section, a middle section and a lower section from top to bottom, the middle section tube body 10 corresponds to the reducing channel 7, and the lower section tube body 3 corresponds to the bottom cavity 8 (for containing the blood sample part except the supernatant in the blood sample). Height of the upper tube body 14: height of the middle section pipe body 10: height = (0.1 to 0.5) of the lower-stage pipe body 3: (2-3): 1, for example, 0.1: 2: 1. 0.25): 2: 1 or 0.5: 3: 1, etc. Inner diameter of the upper tube body 14: inner diameter of the middle-stage pipe body 10: inner diameter = (2-3) of the lower-stage pipe body 3: 1: (2-3), for example: 2: 1: 2. 2: 1: 3. 3: 1: 2. 3: 1: 3 or 2.5: 1: 2.5, etc.

Through pipe body 1 from top to bottom falls into upper, middle and lower three-section, and middle section pipe body 10 corresponds undergauge passageway 7, the height of upper segment pipe body 14: height of the middle section pipe body 10: height = (0.1 to 0.5) of the lower-stage pipe body 3: (2-3): 1, inner diameter of the upper tube body 14: inner diameter of the middle-stage pipe body 10: inner diameter = (2-3) of the lower-stage pipe body 3: 1: and (2) the design of (3) makes the design of the blood sampling tube more reasonable.

Further, the part of the second balloon 13 at the bottom of the tube body 1 is bonded to the tube body 1. The second air cell 13 is prevented from being driven to rotate along with the rotation of the rotary bottom shell 12 in the rotation process, so that the normal use of the second air duct 11 is prevented from being influenced.

In addition, the tube body 1 and the annular cylinder are both made of transparent materials. The channel section of undergauge passageway 7 also can be the passageway of non-isodiametric, and this passageway can the undergauge raise the supernatant of blood sample can, satisfy: inner diameter of the upper tube body 14: minimum inner diameter of the middle-stage pipe body 10: inner diameter = (2.5 to 3) of the lower-stage pipe body 3: 1: (2.5-3), and the inner diameter of the upper segment pipe body 14: maximum inner diameter of the middle-stage pipe body 10: inner diameter = (2-2.5) of the lower-stage pipe body 3: 1: (2-2.5).

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization of those skilled in the art; when the technical solutions are contradictory or cannot be combined, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Claims (8)

1. A centrifugal blood collection tube is characterized in that:

the blood collection tube comprises a tube body, a tube cover, a piston and a reducing part, wherein the tube body is of a blind structure with an open top end, a piston mounting hole is formed in the central position of the tube cover, the tube cover is sealed and connected onto the open top end of the tube body, the piston is arranged in the mounting hole of the tube cover, and the reducing part is arranged at the middle section position in the tube body to correspondingly reduce the caliber of the middle section position in the tube body, so that a reducing channel with the same diameter is formed.

2. The centrifugal blood collection tube of claim 1, wherein:

the reducing part is a section of annular cylinder body which is of a hollow structure and is integrally formed with the pipe body.

3. The centrifugal blood collection tube according to claim 1 or 2, wherein:

the pipe body is divided into an upper section, a middle section and a lower section from top to bottom, the middle section pipe body corresponds to the reducing channel,

height of the upper pipe body: height of the middle section pipe body: the height of the lower-section pipe body is = (0.1-0.5): (2-3): 1,

inner diameter of the upper tube body: inner diameter of the middle section pipe body: inner diameter of lower tube body = (2-3): 1: (2-3).

4. A centrifugal blood collection tube is characterized in that:

the blood collection tube comprises a tube body, a tube cover, a piston and a reducing part, wherein the tube body is of a blind structure with an opening at the top end, a piston mounting hole is formed in the center of the tube cover, the tube cover is hermetically connected to the opening at the top end of the tube body, the piston is arranged in the mounting hole of the tube cover,

the reducing part mainly comprises a first air bag, a first air duct and a sealing plug,

the first air bag is annular and is laid on the inner wall surface of the middle section in the tube body, a tube opening at one end of the air duct is communicated with the first air bag, and a tube opening at the other end of the air duct extends out of the tube cover or the peripheral wall surface of the tube body; wherein, a pipe orifice at one end of the air duct is provided with a sealing plug;

when gas or liquid is injected into the first air bag, the first air bag can be gradually expanded along the radial direction until the inner ring surface of the first air bag forms a section of reducing channel.

5. The centrifugal blood collection tube of claim 4, wherein:

when the diameter reducing channel is equal, the pipe body is divided into an upper section, a middle section and a lower section from top to bottom, the middle section of the pipe body corresponds to the diameter reducing channel,

height of the upper pipe body: height of the middle section pipe body: the height of the lower-section pipe body is = (0.1-0.5): (2-3): 1,

inner diameter of the upper tube body: inner diameter of the middle section pipe body: inner diameter of lower tube body = (2-3): 1: (2-3).

6. A centrifugal blood collection tube is characterized in that:

the blood collection tube comprises a tube body, a tube cover, a piston and a reducing part, wherein the tube body is of a blind structure with an opening at the top end, a piston mounting hole is formed in the center of the tube cover, the tube cover is hermetically connected to the opening at the top end of the tube body, the piston is arranged in the mounting hole of the tube cover,

the reducing part mainly comprises a first air bag, a rotary bottom shell, a second air bag and a second air duct,

the first air bag is in a ring shape and is laid on the inner wall surface at the middle section position in the tube body,

the rotary bottom shell is of a blind structure with an opening at the top end, an internal thread is arranged at the opening at the top end of the rotary bottom shell, an external thread matched with the internal thread of the rotary bottom shell is arranged on the peripheral wall surface of the bottom of the pipe body, the rotary bottom shell is screwed at the bottom of the pipe body, so that a containing cavity with changeable volume is formed between the rotary bottom shell and the bottom of the pipe body,

the second air bag is pre-stored with gas or liquid and is arranged in the accommodating cavity,

the tube orifice at one end of the second air duct is communicated with the first air bag, the tube orifice at the other end is communicated with the second air bag,

and the rotary bottom shell is screwed to reduce the volume of the accommodating cavity so as to compress the second air bag, and the gas or liquid in the second air bag is injected into the first air bag through the second air duct so as to gradually expand the first air bag until the inner annular surface of the first air bag forms a section of reducing channel.

7. The centrifugal blood collection tube of claim 6, wherein:

when the diameter reducing channel is equal, the pipe body is divided into an upper section, a middle section and a lower section from top to bottom, the middle section of the pipe body corresponds to the diameter reducing channel,

height of the upper pipe body: height of the middle section pipe body: the height of the lower-section pipe body is = (0.1-0.5): (2-3): 1,

inner diameter of the upper tube body: inner diameter of the middle section pipe body: inner diameter of lower tube body = (2-3): 1: (2-3).

8. The centrifugal blood collection tube of claim 6, wherein:

the part of the second air bag positioned at the bottom of the pipe body is bonded with the pipe body.

Images