CN220124717U - Body fluid sample collection device - Google Patents

Abstract

The utility model discloses a body fluid sample collection device; the device comprises a collection rod, a sampling progress indicating element and a sample absorber; the outer end of the collecting rod is fixedly provided with a sample absorber; the collecting rod is in a transparent tubular shape with an open outer end; the sampling progress indicating element is strip-shaped and is arranged in the inner cavity of the acquisition rod; the sampling progress indicating element is in contact with the sample absorber. The utility model sets the collection rod as a hollow transparent structure, and puts a strip-shaped sampling progress indicating element into the collection rod; the elongated structure of the sampling progress indicating element can facilitate the user to observe the color change thereof, thereby indicating the sufficiency of sample collection more clearly and accurately. The utility model is provided with an annular groove on the suction head installation part at the outer end of the collection rod. The annular groove can function to contain adhesive and help prevent the adhesive from flowing into and clogging the interior cavity of the collection rod during the process of adhering the sample absorber to the tip mounting portion.

Description

Body fluid sample collection device

Technical Field

The utility model belongs to the technical field of liquid sample detection, and particularly relates to a body fluid sample collection device.

Background

One type of test that exists in hospital testing is to take a sample of a liquid from a patient by sampling a swab or swab into a test tube. When a sampling swab is placed into the oral cavity or the nasal cavity for sampling, it is often difficult for medical staff to observe the collection condition of a liquid sample on the swab, so that the medical staff needs to wait for a long time.

Disclosure of Invention

The utility model aims to provide a body fluid sample collection device.

The utility model relates to a body fluid sample collection device, which comprises a collection rod and a sample absorber; the device also comprises a sampling progress indicating element; the outer end of the acquisition rod is provided with a sample absorber; the collecting rod is in a transparent tubular shape with an open outer end; the sampling progress indicating element is in a strip shape and is partially or completely positioned in the inner cavity of the acquisition rod; the sampling progress indicator element is in contact with the sample absorber or in communication through the liquid conduit.

Preferably, the sample absorber is connected with the outer end of the acquisition rod through a mounting rod; the sample absorber is provided with a central hole aligned with the opening of the acquisition rod; the mounting rod comprises a rod body and an end surface limiting part; the end surface limiting part is arranged at the outer end of the rod body and is contacted with the outer end surface of the sample absorber; the inner end of the rod body passes through the central hole of the acquisition rod and extends into the inner cavity of the acquisition rod; the inner end of the rod body and the inner side wall of the acquisition rod form a movable connection which can prevent the rod body from being completely separated from the inner cavity of the acquisition rod.

Preferably, an installation cavity is formed in the inner end face of the rod body; the sampling progress indicating element in a strip shape is inserted into the mounting cavity, and the end part of the sampling progress indicating element extends out of the mounting cavity; the rod body is provided with a liquid guide flow passage; one end of the liquid guide flow passage is communicated with the outer side surface of the rod body, and the other end of the liquid guide flow passage is communicated with the bottom of the installation cavity.

Preferably, the mounting rod further comprises a barb limiting part; the barb limiting part is positioned at the outer end of the rod body; a limiting step is arranged on the side wall of the inner cavity of the collecting rod; the limiting step of the inner cavity of the collecting rod provides axial limiting for the barb limiting part.

Preferably, the barb limiting part comprises a plurality of elastic limiting pieces arranged at different positions on the outer side surface of the rod body; the two ends of the elastic limiting piece are respectively a fixed end and a free end; the fixed end of the elastic limiting piece and the outer side surface of the rod body are integrally formed; a space is arranged between the elastic limiting piece and the rod body; the free end of the elastic limiting piece is provided with a limiting convex point; the limiting step of the inner cavity of the collecting rod provides axial limiting for the limiting convex point; the limit convex points are contacted with the side surface of the inner cavity of the collecting rod.

Preferably, the outer end of the collecting rod is provided with a suction head mounting part; the outer end face of the suction head installation part is provided with an annular groove; the annular groove divides the outer end face of the suction head mounting part into a central boss and an annular flange which surrounds the outer side of the central boss at intervals; the opening of the inner cavity of the collecting rod is positioned at the center of the center boss; the sample absorber is adhered and fixed with the annular groove on the outer end surface of the suction head installation part.

Preferably, a second seal ring is mounted on the outer circumferential surface of the suction head mounting portion.

Preferably, the sample absorber is provided with a central hole; the sampling progress indicating element is fixed in the inner cavity of the acquisition rod; the outer end of the sampling progress indicating element extends out of the inner cavity of the acquisition rod and extends into the central hole of the sample absorber.

Preferably, the length of the part of the sampling progress indicating element extending into the sample absorber ranges from 0.1t to 0.2t; t is the length of the sample absorber central hole.

Preferably, the body fluid sample collection device further comprises a sampling cap; the inner end of the acquisition rod is fixed with the inner center of the sampling cover.

The utility model has the beneficial effects that:

1. the utility model sets the collection rod as a hollow transparent structure, and puts a strip-shaped sampling progress indicating element into the collection rod; the elongated structure of the sampling progress indicating element can facilitate the user to observe the color change thereof, thereby indicating the sufficiency of sample collection more clearly and accurately.

2. According to the utility model, the sealing ring is arranged at the end part of the collecting rod, so that the upward flow of the sample liquid in the collecting bottle can be avoided in the process of extruding the liquid sample in the sample absorber.

3. The utility model is provided with an annular groove on the suction head installation part at the outer end of the collection rod. The annular groove can function to contain adhesive and help prevent the adhesive from flowing into and clogging the interior cavity of the collection rod during the process of adhering the sample absorber to the tip mounting portion.

4. According to the utility model, the strip-shaped sampling progress indicating element is arranged in the mounting rod capable of sliding along the inner cavity of the sampling rod, and the relative position of the sample absorber and the collecting rod is kept by utilizing the mounting rod, so that the bonding procedure between the sample absorber and the collecting rod is omitted, the risk of isolation between the sampling progress indicating element and the sample absorber by hot melt adhesive can be effectively avoided, and the yield in production of the utility model is improved.

Drawings

Fig. 1 is a schematic cross-sectional view of embodiment 1 of the present utility model.

Fig. 2 is an exploded view of example 1 of the present utility model.

FIG. 3 is a schematic view showing the installation of the sample absorber in example 1 of the present utility model.

FIG. 4 is a schematic view showing the structure of a tip attachment portion in example 1 of the present utility model.

FIG. 5 is a schematic cross-sectional view showing the extrusion process of a sample liquid according to example 2 of the present utility model.

Fig. 6 is a schematic perspective view showing a sample liquid extrusion process according to example 2 of the present utility model.

Fig. 7 is a schematic view showing the structure of a mounting bar in embodiment 2 of the present utility model.

Fig. 8 is a schematic sectional view of a mounting bar according to embodiment 2 of the present utility model.

Fig. 9 is a schematic view showing a structure of a body fluid sample collection device according to embodiment 2 of the present utility model mounted in a collection bottle.

Reference numerals: 1. a sampling cover; 2. a first seal ring; 3. a collection rod; 4. a second seal ring; 5. a sampling progress indicating element; 6. a sample absorber; 3-1, a suction head mounting part; 3-2, an annular groove; 7. a mounting rod; 7-1, a rod body; 7-2, an end surface limiting part; 7-3, a barb limiting part.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

As shown in fig. 1, 2 and 3, a body fluid sample collection device for use with a collection bottle for storing a liquid sample includes a sampling cap 1, a first seal ring 2, a collection rod 3, a second seal ring 4, a sampling progress indicating member 5, and a sample absorber 6. The circumference face of the sampling cover 1 is provided with a concave-convex anti-slip structure, which is helpful for improving the anti-slip effect of the sampling cover. An internal thread for connecting the collection bottle is arranged in the sampling cover 1. The first sealing ring 2 is arranged in the sampling cover 1 and is used for sealing between the body fluid sample collecting device and the opening of the collecting bottle. The inner end of the acquisition rod 3 is fixed with the inner center of the sampling cover 1. The sampling cover 1 and the collecting rod are inserted and fixed in a jogged mode through a tongue-and-groove structure.

The outer end of the collecting rod 3 is integrally formed with a suction head mounting part 3-1. The sample absorber 6 is fixed coaxially with the outer surface of the tip attachment portion 3-1. The sample absorber 6 is made of sponge or other materials capable of absorbing liquid samples. The outer circumferential surface of the suction head mounting part 3-1 is provided with an annular groove. The second sealing ring 4 is embedded in an annular groove on the outer circumferential surface of the suction head mounting part 3-1. The second sealing ring 4 is used for forming a seal with the inner side wall of the collecting bottle, so that the liquid sample extruded in the sample absorber 6 is prevented from flowing upwards in the collecting bottle, and the sample loss is reduced.

The collecting rod 3 is of a hollow tubular structure with an open outer end. The sample absorber 6 is provided with a central hole communicating with the inner cavity of the collection rod 3. The sampling progress indicating element 5 is in a strip shape and is arranged in the inner cavity of the acquisition rod 3. The outer end of the sampling progress indicating element 5 extends out of the inner cavity of the collection rod 3 and into the inner end of the central hole of the sample absorber 6. The length of the part of the sampling progress indicating element 5 extending into the sample absorber 6 is in the range of 0.1 t-0.2 t; t is the length of the central hole of the sample absorber 6.

In some embodiments, as shown in FIG. 4, the sample absorber 6 is adhesively secured to the outer end surface of the tip mounting portion 3-1. An annular groove 3-2 is arranged on the outer end surface of the suction head mounting part 3-1. The annular groove 3-2 divides the outer end surface of the suction head mounting part 3-1 into a central boss and an annular flange which surrounds the outer side of the central boss at intervals; the outer end opening of the inner cavity of the acquisition rod 3 is positioned at the center of the center boss. The sample absorber 6 extends into the annular groove 3-2 through deformation and is bonded with the inner side wall of the annular groove 3-2; the annular recess 3-2 can function to contain adhesive and help prevent the adhesive from flowing into and clogging the interior cavity of the collection rod during the process of adhering the sample absorber 6 to the tip mounting portion 3-1.

The sampling progress indicating element 5 will change color when it is in contact with saliva, thereby indicating whether a sufficient amount of saliva is collected during the sampling process. The acquisition rod 3 is made of a transparent material so as to observe the color change of the sampling progress indicating element 5.

In some embodiments, the sampling progress indicating element 5 comprises a strip-shaped substrate, and a color-changing coating disposed on an outer surface of the strip-shaped substrate. The color-changing coating is made of a material which becomes transparent when meeting water; the color-changing coating layer has a color in an initial state different from the surface color of the strip-shaped substrate. When the liquid sample wets the surface of the sampling progress indicating element 5, the color-changing coating becomes transparent, so that the color of the strip-shaped substrate appears.

In some embodiments, the sampling progress indicator element 5 comprises a bibulous strip, and a colored pigment disposed on an outer surface of the bibulous strip. The colored pigment is coated or sprayed on the water-absorbing paper strip. When the liquid sample infiltrates the surface of the sampling progress indicating element 5, the water absorbing paper strip absorbs the liquid sample, and pigment chromatography occurs, so that indication is realized.

In some embodiments, a collection bottle for mating with a body fluid sample collection device includes an extrusion portion of an inner layer and a storage portion of an outer layer. Both the extrusion part and the storage part are cylindrical. The bottom of the storage part is closed; the bottom of the extrusion part is provided with an eduction tube. The drawing tube is used for drawing out the liquid in the extruding part into the storage part. The bottom of the inner cavity of the squeezing part can squeeze the sample absorber 6, releasing the liquid sample adsorbed in the sample absorber 6. The diameter of the inner cavity of the extrusion part is larger than the diameter of the suction head mounting part 3-1 and smaller than the outer diameter of the second sealing ring 4, so that when the collecting rod 3 is inserted into the collecting bottle, the suction head mounting part 3-1 and the inner side wall of the extrusion part form a seal.

In some embodiments, the squeeze portion is separable from the reservoir portion to facilitate pouring of the liquid sample.

In some embodiments, the storage part is provided with a detection element, so that the collection and detection integration of the liquid sample can be completed.

The working principle of the utility model is as follows:

the sample absorber 6 of the body fluid sample collection device is put into the body fluid to be collected, whether the color change exists in the sampling progress indicating element 5 in the transparent collection rod 3 is observed, and if the color change exists, the collection is proved to be completed. Thereafter, the collection rod 3 is inserted into the collection bottle to compress the sample absorber 6, thereby completing the release of the liquid sample.

Example 2

As shown in fig. 5 and 6, a body fluid sample collection device of this embodiment differs from that of embodiment 1 in that: comprising a mounting bar 7. The mounting rod 7 is mounted in the sample absorber 6 and the collection rod 3, and is capable of sliding along the length direction of the lumen of the collection rod 3, so that the sample absorber 6 is compressed along its own length direction. The end face of the suction head mounting part 3-1 is not provided with an annular groove. The sample absorber 6 is not bonded to the tip attachment portion 3-1, but is held in a relative position by the attachment lever 7.

As shown in fig. 7 and 8, the mounting rod 7 includes a rod body 7-1, an end surface limiting portion 7-2, and a barb limiting portion 7-3, which are integrally formed. The rod body 7-1 passes through the central hole of the sample absorber 6 and extends into the inner cavity of the collection rod 3. The end surface limiting part 7-2 and the barb limiting part 7-3 are respectively positioned at the outer end and the inner end of the rod body 7-1. The diameter of the end surface limiting part 7-2 is larger than the aperture of the central hole of the sample absorber 6, and the end surface limiting part 7-2 is contacted with the outer end surface of the sample absorber 6. The inner end face of the mounting rod 7 is provided with a mounting cavity 7-4. The sampling progress indicating element 5 in a strip shape is inserted into the mounting cavity 7-4, and the end part of the sampling progress indicating element extends out of the mounting cavity 7-4; the user can observe the color change of the sampling progress indicating element 5 through the transparent mounting bar.

In some embodiments, the mounting bar 7 is provided with a liquid guide channel 7-5. One end of the liquid guide channel 7-5 is communicated with the outer side surface of the mounting rod 7, and the other end of the liquid guide channel 7-5 is communicated with the bottom of the mounting cavity 7-4. In the initial state, the end face of the outer side face of the liquid guide channel 7-5 connected with the mounting rod 7 is aligned with the inner side wall of the center hole of the sample absorber 6. The liquid guide channel 7-5 enables the liquid sample absorbed in the sample absorber 6 to enter the mounting cavity 7-4 of the mounting rod 7, infiltrates the sampling progress indicating element 5, and achieves the indication of the sampling progress.

The position of the side wall of the inner cavity of the acquisition rod 3, which is close to the opening, is provided with a limiting step, and the limiting step enables the inner cavity of the acquisition rod 3 to be in a stepped hole structure with small outside and large inside.

The barb limiting part 7-3 comprises two elastic limiting sheets arranged on the opposite sides of the outer side face of the rod body 7-1. The two ends of the elastic limiting piece are respectively a fixed end and a free end; the fixed end of the elastic limiting piece and the outer side surface of the rod body 7-1 are integrally formed. The elastic limiting piece and the rod body 7-1 are provided with a spacing area, so that the free end of the elastic limiting piece can bend and deform towards the rod body 7-1.

The free end of the elastic limiting piece is provided with a limiting convex point. An axial limiting surface is arranged on one side of the limiting convex point, which is close to the end surface limiting part 7-2; one side of the limiting convex point, which is far away from the end surface limiting part 7-2, is provided with an inclined guide surface. The limiting step of the inner cavity of the collection rod 3 can provide axial limiting for the axial limiting surface on the barb limiting part 7-3, so that the installation rod 7 cannot be separated from the inner cavity of the collection rod 3. The inclined guide surface is used for promoting the deformation (section reduction) of the barb limiting part 7-3 in the process of inserting the barb limiting part 7-3 into the inner cavity of the acquisition rod 3, so that the barb limiting part 7-3 can pass through the limiting step.

In some embodiments, the sample absorber 6 is a sponge that is hard in the dry state and soft in the wet state. During assembly of the mounting bar 7, the collecting bar 3, the sampling progress indicating element 5 and the sample absorber 6; the mounting rod 7 provided with the sampling progress indicating element 5 is inserted into the central hole of the sample absorber 6, the barb limiting part 7-3 on the mounting rod 7 passes through the limiting step in the collecting rod 3 to form axial limiting, so that the sample absorber 6 is contacted with the outer end of the collecting rod 3.

At the same time, the sample absorber 6, which is hard in the dry state, can provide axial limitation to the end surface limiter 7-2 on the mounting rod 7. The mounting rod 7 keeps fixed in position under the axial limiting action of opposite directions provided by the outer end face of the sample absorber 6 and the limiting step of the inner cavity of the collecting rod 3, and meanwhile, glue-free fixation between the sample absorber 6 and the collecting rod 3 is realized. Only after the sample absorber 6 has been wetted and softened can the mounting bar 7 be pushed to continue sliding into the collection bar 3. By pushing the mounting bar 7 inward, squeezing of the wet sample absorber 6 can be achieved, so that the liquid sample absorbed in the sample absorber 6 is squeezed out. The pushing of the mounting rod 7 can be realized by matching with the bottom surface of the inner cavity of the acquisition bottle.

Since the assembly of the sampling progress indicator 5, the collection rod 3 and the sample absorber 6 in this embodiment does not use any glue bonding, this embodiment can effectively avoid the situation that the sampling progress indicator 5 and the sample absorber 6 are isolated by glue.

In some embodiments, a friction structure or a unidirectional locking structure is formed between the outer side surface of the mounting rod 7 and the inner cavity side surface of the collecting rod 3, so that after the mounting rod 7 slides towards the inside of the collecting rod 3, the mounting rod cannot be automatically reset, the sample absorber 6 is ensured to be in a compressed state continuously, and the liquid sample is prevented from being re-absorbed after the sample absorber 6 returns to an initial state. The friction structure is specifically as follows: the barb limiting part 7-3 forms interference fit with the side surface of the inner cavity of the acquisition rod 3. The unidirectional locking structure specifically comprises: the barb limiting part 7-3 and the acquisition rod 3 form a linear ratchet mechanism. It should be noted that the inability of the mounting bar 7 to automatically reset is not an essential feature.

The state of the body fluid sample collection device provided in this embodiment after being inserted into a collection bottle is shown in fig. 9.

Other structures of this embodiment are the same as those of embodiment 1.

Claims (9)

1. A body fluid sample collection device comprising a collection stick (3) and a sample absorber (6); the method is characterized in that: also comprises a sampling progress indicating element (5); the outer end of the acquisition rod (3) is provided with a sample absorber (6); the collecting rod (3) is in a transparent tubular shape with an open outer end; the sampling progress indicating element (5) is in a strip shape and is partially or completely positioned in the inner cavity of the acquisition rod (3); the sampling progress indicating element (5) is contacted with the sample absorber (6) or communicated with the liquid guide channel;

the sample absorber (6) is connected with the outer end of the acquisition rod (3) through the mounting rod (7); the sample absorber (6) is provided with a central hole aligned with the opening of the acquisition rod (3); the mounting rod (7) comprises a rod body (7-1) and an end surface limiting part (7-2); the end surface limiting part (7-2) is arranged at the outer end of the rod body (7-1) and is contacted with the outer end surface of the sample absorber (6); the inner end of the rod body (7-1) passes through the central hole of the acquisition rod (3) and stretches into the inner cavity of the acquisition rod (3); the inner end of the rod body (7-1) and the inner side wall of the acquisition rod (3) form a movable connection which can prevent the rod body (7-1) from being completely separated from the inner cavity of the acquisition rod (3).

2. A body fluid sample collection device according to claim 1, wherein: an installation cavity is formed in the inner end face of the rod body (7-1); the sampling progress indicating element (5) in a strip shape is inserted into the mounting cavity, and the end part of the sampling progress indicating element extends out of the mounting cavity; the rod body (7-1) is provided with a liquid guide flow passage; one end of the liquid guide flow passage is communicated with the outer side surface of the rod body (7-1), and the other end of the liquid guide flow passage is communicated with the bottom of the installation cavity.

3. A body fluid sample collection device according to claim 1, wherein: the mounting rod (7) also comprises a barb limiting part (7-3); the barb limiting part (7-3) is positioned at the outer end of the rod body (7-1); a limiting step is arranged on the side wall of the inner cavity of the collecting rod (3); the limiting step of the inner cavity of the acquisition rod (3) provides axial limiting for the barb limiting part (7-3).

4. A body fluid sample collection device according to claim 3, wherein: the barb limiting part (7-3) comprises a plurality of elastic limiting pieces arranged at different positions on the outer side surface of the rod body (7-1); the two ends of the elastic limiting piece are respectively a fixed end and a free end; the fixed end of the elastic limiting piece and the outer side surface of the rod body (7-1) are integrally formed; a space is arranged between the elastic limiting piece and the rod body (7-1); the free end of the elastic limiting piece is provided with a limiting convex point; the limiting step of the inner cavity of the collecting rod (3) provides axial limiting for the limiting convex point; the limit protruding points are contacted with the side surface of the inner cavity of the collecting rod (3).

5. A body fluid sample collection device according to claim 1, wherein: the outer end of the collecting rod (3) is provided with a suction head mounting part (3-1); an annular groove (3-2) is formed in the outer end face of the suction head mounting part (3-1); the annular groove (3-2) divides the outer end face of the suction head mounting part (3-1) into a central boss and an annular flange which surrounds the outer side of the central boss at intervals; an opening of the inner cavity of the acquisition rod (3) is positioned at the center of the center boss; the sample absorber (6) is adhered and fixed with the annular groove (3-2) on the outer end surface of the suction head installation part (3-1).

6. A body fluid sample collection device according to claim 5, wherein: the second sealing ring (4) is arranged on the outer circumferential surface of the suction head installation part (3-1).

7. A body fluid sample collection device according to any one of claims 1-6 wherein: the sample absorber (6) is provided with a central hole; the sampling progress indicating element (5) is fixed in the inner cavity of the acquisition rod (3); the outer end of the sampling progress indicating element (5) extends out of the inner cavity of the acquisition rod (3) and extends into the central hole of the sample absorber (6).

8. A body fluid sample collection device according to any one of claims 1-6 wherein: the length of the part of the sampling progress indicating element (5) extending into the sample absorber (6) is in the range of 0.1 t-0.2 t; t is the length of the central hole of the sample absorber (6).

9. A body fluid sample collection device according to any one of claims 1-6 wherein: also comprises a sampling cover (1); the inner end of the acquisition rod (3) is fixed with the inner center of the sampling cover (1).