CN110292678B

CN110292678B - A pulsatile blood transfusion device

Info

Publication number: CN110292678B
Application number: CN201910737706.9A
Authority: CN
Inventors: 王改; 王聪蕊; 徐小丹
Original assignee: First Affiliated Hospital of Henan University of Science and Technology
Current assignee: First Affiliated Hospital of Henan University of Science and Technology
Priority date: 2019-08-12
Filing date: 2019-08-12
Publication date: 2021-05-18
Anticipated expiration: 2039-08-12
Also published as: CN110292678A

Abstract

A pulsating blood transfusion device comprises a catheter for communicating a blood bag and a blood transfusion needle, wherein a contraction part and an expansion part are sequentially arranged in the middle of an upper catheter from the blood bag to the blood transfusion needle, and a squeezing mechanism for periodically squeezing the expansion part is arranged on the side of the expansion part. The pulsating blood transfusion device provided by the invention can simulate the normal blood supply process of the heart, so that the discomfort of a patient is relieved, and the stress reaction generated by the body of the patient is avoided to deepen the illness state of the patient.

Description

Pulsating blood transfusion device

Technical Field

The invention relates to the field of blood transfusion devices, in particular to a pulsating blood transfusion device.

Background

Blood transfusion is a commonly used rescue means in medical treatment, and is mainly used for patients with blood loss. In the prior art, in order to overcome the resistance of blood vessels and ensure the smooth blood transfusion process, a pressurizing device is usually additionally arranged to increase the blood pressure and flow rate. However, the existing pressurizing devices mostly adopt constant pressure, which leads to the stability and inconvenience of the flow rate of blood, and if the flow rate is too large, the patient can feel uncomfortable, some stress reactions can also occur in time of the coma of the patient, the treatment is easily interfered, and the illness state can be seriously aggravated.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides a pulsating blood transfusion device which can simulate the normal blood supply process of the heart, thereby relieving the discomfort of a patient and avoiding the stress reaction generated by the body of the patient to deepen the illness state of the patient.

In order to achieve the purpose, the invention adopts the specific scheme that: a pulsating blood transfusion device comprises a catheter for communicating a blood bag and a blood transfusion needle, wherein a contraction part and an expansion part are sequentially arranged in the middle of an upper catheter from the blood bag to the blood transfusion needle, and a squeezing mechanism for periodically squeezing the expansion part is arranged on the side of the expansion part.

As a preferable scheme, the device further comprises a bracket, a fixing clamp used for clamping the blood bag is fixedly arranged at the upper end of the bracket, a supporting plate used for bearing the contraction part, the expansion part and the extrusion mechanism is horizontally and fixedly arranged in the middle of the bracket, and a fixing buckle used for clamping the catheter is fixedly arranged on the supporting plate.

As an optimal scheme, the extrusion mechanism includes and sets firmly perpendicularly mounting panel on the layer board, fixed sleeve and the first linear reciprocating motion mechanism of being provided with on the mounting panel, the sleeve with pipe mutually perpendicular is provided with solid fixed ring and loose ring in the sleeve, and wherein the loose ring is close to the expansion portion is connected through first spring between solid fixed ring and the loose ring, and the drive of first linear reciprocating motion mechanism is connected with the catch bar, and the catch bar passes solid fixed ring and loose ring back fixedly connected with stripper plate in proper order to catch bar and loose ring fixed connection.

As a preferable scheme, the first linear reciprocating mechanism comprises a first driving motor fixedly arranged on the mounting plate, the first driving motor is connected with an elliptical disc in a driving mode, and the elliptical disc is close to the push rod.

As a preferable scheme, one end of the push rod, which is far away from the expansion part, is fixedly connected with a push plate, and the push plate is arc-shaped.

The fixed two holders that are provided with on the mounting panel, two holders are located respectively the both ends of expansion portion, the pipe passes two holders.

As an optimal scheme, extrusion mechanism is including setting up perpendicularly mounting panel and slip cover on the layer board are established movable sleeve on the pipe is fixed on the mounting panel and is provided with guide holder and fixing base to guide holder and fixing base are located the both sides of pipe respectively, have seted up the guide way on the guide holder, are provided with fixed block and movable block in the guide way, and the fixed block is connected through the second spring with the movable block, and it is provided with the slider to slide on the fixing base, and slider and movable block all with movable sleeve fixed connection, the slider still are connected with the promotion unit that is used for promoting the slider.

Preferably, the sliding member is configured as a rack, and the pushing unit includes a second driving motor fixedly disposed on the mounting plate and a swing gear driven by the second driving motor, and the swing gear is engaged with the rack.

As a preferred scheme, the fixed seat is provided with a sliding groove, the rack is fixedly connected with a sliding block, the sliding block is arranged in the sliding groove, and one end of the sliding groove is connected with the sliding block through a third spring.

As a preferred scheme, a clamping piece is fixedly arranged on the mounting plate, the clamping piece and the movable sleeve are respectively arranged at two ends of the expansion part, and the guide pipe penetrates through the clamping piece.

Has the advantages that: by adjusting the period of extrusion and the force of single extrusion, the invention can simulate the normal blood supply process of the heart, thereby relieving the discomfort of the patient and avoiding the stress reaction generated by the body of the patient to deepen the illness state of the patient.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of the constricted and expanded portions;

FIG. 3 is a schematic view showing the direction of flow of internal blood when the dilating portion is compressed;

FIG. 4 is a schematic structural view of a pressing mechanism according to the first embodiment;

fig. 5 is a schematic structural view of the pressing mechanism of the second embodiment.

Description of the drawings: 1-bracket, 2-fixing clip, 3-blood bag, 4-fixing box, 5-conduit, 6-splint, 7-fixing buckle, 8-contraction part, 9-expansion part, 10-mounting plate, 11-clamping part, 12-first driving motor, 13-elliptic disc, 14-pushing plate, 15-pushing rod, 16-fixing ring, 17-sleeve, 18-first spring, 19-movable ring, 20-extrusion plate, 21-guide seat, 22-guide groove, 23-fixing block, 24-second spring, 25-movable block, 26-movable sleeve, 27-fixing seat, 28-third spring, 29-rack, 30-swing gear and 31-second driving motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 5, a pulsating blood transfusion device includes a tube 5 for communicating a blood bag 3 and a blood transfusion needle, a contraction part 8 and an expansion part 9 are sequentially provided in the middle of the upper tube 5 from the blood bag 3 to the blood transfusion needle, and a pressing mechanism for periodically pressing the expansion part 9 is provided at the side of the expansion part 9.

In the blood transfusion process, the expansion part 9 is periodically pressed by the pressing mechanism, when the blood in the expansion part 9 is pressed, the blood flows in two directions, as shown in fig. 3, wherein a single arrow is the normal flow direction of the blood, and a double arrow is the flow direction of the internal blood after the expansion part 9 is pressed, it can be seen that one part of the blood flows reversely to the blood bag 3, the other part of the blood flows to the patient, and the part flowing to the patient is merged with the normal flow blood to increase the pressure, thereby forming the blood supply effect similar to that generated when the heart contracts. After the squeezing mechanism stops, the expansion part 9 recovers, and the blood which originally flows to the blood bag 3 in the recovery process enters the expansion part 9 again, so that the expansion part 9 is kept in a full state for the next squeezing. The constriction 8 is used to contain the blood flowing from the expansion 9 to the blood bag 3, to prevent the blood from flowing back into the blood bag 3, and to maintain the normal blood supply of the blood bag 3. By adjusting the period of extrusion and the force of single extrusion, the invention can simulate the normal blood supply process of the heart, thereby relieving the discomfort of the patient and avoiding the stress reaction generated by the body of the patient to deepen the illness state of the patient.

Further, the device still includes support 1, and the upper end of support 1 is fixed and is provided with fixation clamp 2 that is used for centre gripping blood bag 3, and the middle part level of support 1 sets firmly the layer board 6 that is used for bearing constriction part 8, expansion part 9 and extrusion mechanism, and the fixed knot 7 that is used for centre gripping pipe 5 that is provided with on the layer board 6. The retaining buckle 7 serves to secure the catheter 5 in order to avoid a displacement of the catheter 5 during the squeezing of the expansion 9. The holder 1 is further provided with a fixing box 4 for accommodating the blood bag 3.

Two specific embodiments of the pressing mechanism are provided below.

The first embodiment.

The extrusion mechanism comprises a mounting plate 10 vertically and fixedly arranged on the supporting plate 6, a sleeve 17 and a first linear reciprocating mechanism are fixedly arranged on the mounting plate 10, the sleeve 17 is perpendicular to the guide pipe 5, a fixing ring 16 and a movable ring 19 are arranged in the sleeve 17, the movable ring 19 is close to the expansion part 9, the fixing ring 16 is connected with the movable ring 19 through a first spring 18, the first linear reciprocating mechanism is in driving connection with a push rod 15, the push rod 15 sequentially penetrates through the fixing ring 16 and the movable ring 19 and then is fixedly connected with an extrusion plate 20, and the push rod 15 is fixedly connected with the movable ring 19.

In the working process of the first linear reciprocating mechanism, the push rod 15 is driven to move axially in the process of stroke expansion, then the push rod 15 pushes the movable ring 19 and the extrusion plate 20 to move, the extrusion plate 20 is used for extruding the expansion part 9, the first spring 18 pulls the movable ring 19 to reset in the process of stroke reduction, and then the movable ring 19 drives the push rod 15 and the extrusion plate 20 to reset to complete one-time extrusion.

Further, the first linear reciprocating mechanism comprises a first driving motor 12 fixedly arranged on the mounting plate 10, the first driving motor 12 is connected with an elliptical disc 13 in a driving mode, and the elliptical disc 13 is close to the push rod 15. When the first driving motor 12 drives the elliptical disk 13 to rotate from the state that the short axis is collinear with the axis of the push rod 15 to the state that the long axis is collinear with the axis of the push rod 15, the stroke of the first linear reciprocating mechanism is gradually increased to extrude the expansion part 9, and conversely, when the first driving motor 12 drives the elliptical disk 13 to rotate from the state that the long axis is collinear with the axis of the push rod 15 to the state that the short axis is collinear with the axis of the push rod 15, the stroke of the first linear reciprocating movement is gradually reduced to gradually reduce the extrusion force on the expansion part 9. By adopting the first linear reciprocating mechanism, the extrusion frequency can be adjusted by only controlling the rotating speed of the first driving motor 12, the control process is simple, the extrusion force can be adjusted by replacing the elliptical disk 13, and the method is simple and easy to implement.

Furthermore, one end of the pushing rod 15 far away from the expanding part 9 is fixedly connected with a pushing plate 14, and the pushing plate 14 is arc-shaped. The pushing plate 14 is used for smoothly transmitting the extrusion force between the elliptical disk 13 and the pushing rod 15, so that the elliptical disk 13 is prevented from generating extrusion force on the pushing rod 15 from the side direction, the pushing rod 15 is prevented from deforming, and the service life of the device is prolonged. The inner diameter of the pusher plate 14 may be equal in size to the radius of the major axis of the oval disk 13.

Further, two clamping pieces 11 are fixedly arranged on the mounting plate 10, the two clamping pieces 11 are respectively positioned at two ends of the expansion part 9, and the conduit 5 passes through the two clamping pieces 11. Holder 11 includes two soft monomers, respectively be provided with a holding tank on two soft monomers, two holding tank cooperations form the passageway that is used for fixed pipe 5, utilize holder 11 can further fix pipe 5, and reverse earlier pull the distance increase between two soft monomers of two soft monomers when using, and expose the holding tank, then put into two soft monomers with pipe 5 between, loosen two soft monomers at last and make soft monomer automatic re-setting, whole process is simple and convenient.

Example two.

Extrusion mechanism establishes the movable sleeve 26 on pipe 5 including perpendicular mounting panel 10 and the slip cover that sets up on layer board 6, fixed guide holder 21 and the fixing base 27 of being provided with on mounting panel 10, and guide holder 21 and fixing base 27 are located the both sides of pipe 5 respectively, guide way 22 has been seted up on guide holder 21, be provided with fixed block 23 and movable block 25 in the guide way 22, fixed block 23 is connected through second spring 24 with movable block 25, it is provided with the slider to slide on the fixing base 27, slider and movable block 25 all with movable sleeve 26 fixed connection, the slider still is connected with the promotion unit that is used for promoting the slider.

The pushing unit pushes the movable member to slide on the fixed seat 27, the movable member drives the movable sleeve 26 to move towards the patient along the conduit 5, the expansion part 9 is extruded by the movable sleeve 26, the movable sleeve 26 drives the movable block 25 to move in the process, so that the distance between the movable block 25 and the fixed block 23 is increased, and the second spring 24 is stretched. Because the movable sleeve 26 is coaxial with the expansion part 9, the blood flow to the patient can be increased, and the blood flow to the blood bag 3 in the opposite direction can be decreased, thereby increasing the blood supply amount per compression. When the pushing unit is released, the second spring 24 is reset, which brings the movable block 25, the movable sleeve 26 and the slider to reset, ready for the next extrusion.

Further, the slider is provided as a rack 29, and the pushing unit includes a second driving motor 31 fixedly provided on the mounting plate 10 and a swing gear 30 driven by the second driving motor 31, the swing gear 30 being engaged with the rack 29. Here, the oscillating gear 30 refers to a gear obtained by removing a part of teeth on the basis of a general gear. The second driving motor 31 drives the swing gear 30 to rotate in one direction, pushes the rack 29 to move when the swing gear 30 is engaged with the rack push lever 19, and resets the rack 29 when the swing gear 30 is disengaged from the rack 29. Similarly, the extrusion frequency can be controlled by only controlling the rotation speed of the second driving motor 31, and the extrusion force can be controlled by changing the number of teeth of the oscillating gear 30 by replacing the oscillating gear 30, which is very convenient.

Furthermore, in order to ensure that the movable sleeve 26 can be smoothly reset, the fixed seat 27 is provided with a sliding groove, the rack 29 is fixedly connected with a sliding block, the sliding block is arranged in the sliding groove, and one end of the sliding groove is connected with the sliding block through a third spring 28. The third spring 28 in cooperation with the second spring 24 provides a stronger spring force and ensures that the two sides of the movable sleeve 26 are balanced.

Furthermore, a clamping piece 11 is fixedly arranged on the mounting plate 10, the clamping piece 11 and the movable sleeve 26 are respectively arranged at two ends of the expansion part 9, and the guide pipe 5 passes through the clamping piece 11.

Further, the catheter 5 may be made of the same material as the infusion tube, and then two initial regions may be formed by local heating, wherein both ends of one initial region are stretched to form the constricted portion 8, and both ends of the other initial region are pressed toward each other to form the expanded portion 9.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pulsating blood transfusion device is characterized in that: comprises a catheter (5) used for communicating a blood bag (3) and a blood transfusion needle, wherein a contraction part (8) and an expansion part (9) are sequentially arranged in the middle of the catheter (5) from the blood bag (3) to the blood transfusion needle, and a squeezing mechanism used for periodically squeezing the expansion part (9) is arranged on the side of the expansion part (9);

the blood bag pressing device is characterized by further comprising a support (1), a fixing clamp (2) for clamping the blood bag (3) is fixedly arranged at the upper end of the support (1), a supporting plate (6) for bearing the contraction part (8), the expansion part (9) and the extrusion mechanism is horizontally and fixedly arranged in the middle of the support (1), and a fixing buckle (7) for clamping the catheter (5) is fixedly arranged on the supporting plate (6);

extrusion mechanism is including perpendicular setting up mounting panel (10) and the slip cover on layer board (6) are established movable sleeve (26) on pipe (5), fixed guide holder (21) and fixing base (27) of being provided with on mounting panel (10), and guide holder (21) and fixing base (27) are located the both sides of pipe (5) respectively, guide way (22) have been seted up on guide holder (21), be provided with fixed block (23) and movable block (25) in guide way (22), fixed block (23) are connected through second spring (24) with movable block (25), it is provided with the slider to slide on fixing base (27), slider and movable block (25) all with movable sleeve (26) fixed connection, the slider still is connected with the promotion unit that is used for promoting the slider.

2. A pulsatile blood transfusion device as claimed in claim 1, wherein: extrusion mechanism is including setting firmly perpendicularly mounting panel (10) on layer board (6), fixedly on mounting panel (10) be provided with sleeve (17) and first linear reciprocating motion mechanism, sleeve (17) with pipe (5) mutually perpendicular is provided with solid fixed ring (16) and activity ring (19) in sleeve (17), and wherein activity ring (19) are close to expansion portion (9), gu be connected through first spring (18) between fixed ring (16) and the activity ring (19), first linear reciprocating motion mechanism drive is connected with catch bar (15), catch bar (15) pass solid fixed ring (16) and activity ring (19) back fixedly connected with stripper plate (20) in proper order to catch bar (15) and activity ring (19) fixed connection.

3. A pulsatile blood transfusion device according to claim 2, wherein: the first linear reciprocating mechanism comprises a first driving motor (12) fixedly arranged on the mounting plate (10), an oval disc (13) is connected to the first driving motor (12) in a driving mode, and the oval disc (13) is close to the push rod (15).

4. A pulsatile blood transfusion device according to claim 3, wherein: one end of the push rod (15) far away from the expansion part (9) is fixedly connected with a push plate (14), and the push plate (14) is arc-shaped.

5. A pulsatile blood transfusion device according to claim 2, wherein: the fixed two holders (11) that are provided with on mounting panel (10), two holders (11) are located respectively the both ends of expansion portion (9), two holders (11) are passed in pipe (5).

6. A pulsatile blood transfusion device as claimed in claim 1, wherein: the sliding piece is provided with a rack (29), the pushing unit comprises a second driving motor (31) fixedly arranged on the mounting plate (10) and a swinging gear (30) driven by the second driving motor (31), and the swinging gear (30) is meshed with the rack (29).

7. A pulsatile blood transfusion device according to claim 6, wherein: the fixing seat (27) is provided with a sliding groove, the rack (29) is fixedly connected with a sliding block, the sliding block is arranged in the sliding groove, and one end of the sliding groove is connected with the sliding block through a third spring (28).

8. A pulsatile blood transfusion device as claimed in claim 1, wherein: the pipe expansion device is characterized in that a clamping piece (11) is fixedly arranged on the mounting plate (10), the clamping piece (11) and the movable sleeve (26) are respectively arranged at two ends of the expansion part (9), and the pipe (5) penetrates through the clamping piece (11).