A skin tensioning device for arm vein puncture and a method of using the same

Abstract

The present invention discloses a skin tensioning device for arm vein puncture, comprising a base plate for supporting the arm, a transverse tensioning mechanism and a longitudinal tensioning mechanism arranged on the base plate for tensioning the skin; the transverse tensioning mechanism comprises a circular ring sleeve arranged on the upper arm to stop bleeding and fix the upper arm, a tensioning structure arranged on the forearm or elbow to laterally tighten the skin, an inflatable armband arranged on the inner surface of the ring sleeve and wrapped around the upper arm, and an inflatable structure for inflating the armband; the ring sleeve and the tensioning structure are respectively arranged at both ends of the base plate, and the longitudinal tensioning mechanism is two and respectively arranged on the ring wall of the ring sleeve. The skin tensioning device of the present invention has a simple and compact structure, is easy to adjust, has high stability, is low in cost, saves manpower, is easy to find and fix the arm vein, helps to improve the success rate of venous puncture, and reduces the pain of patients. The present invention also relates to a method for using a skin tensioning device for arm vein puncture, which is simple to operate, easy to adjust, and reduces the use of manpower.

Description

Technical Field

[0001] The invention relates to a medical product, in particular to a skin tensioning device for arm vein puncture and a use method thereof. Background Art

[0002] PICC (Peripherally Inserted Central Venous Catheters, PICC) is also called peripherally inserted central venous catheterization. It uses a catheter to puncture the vein of the peripheral arm. The catheter goes directly to the superior vena cava close to the heart to avoid direct contact between chemotherapy drugs or irritating drugs and small and medium-sized peripheral veins. In addition, the blood flow rate of large veins is very fast, which can quickly dilute chemotherapy drugs or irritating drugs to prevent drugs from irritating blood vessels. According to the guidelines, the retention time of PICC is generally 1 year, or if there are no obvious complications, the retention time can be appropriately extended. Therefore, on the one hand, PICC can effectively protect the peripheral veins of the upper limbs and reduce the occurrence of phlebitis; on the other hand, it can reduce venous punctures, ensure effective intravenous treatment, relieve patients' pain, and improve patients' quality of life. PICC is a common intravenous infusion catheter in clinical practice. It is generally punctured in the upper arm at the elbow or above the elbow. The insertion process requires strict sterility, and an elastic rubber tube is used as a tourniquet to temporarily block the venous blood return.

[0003] The prior art patent with publication number CN113456192A discloses an adjustment and fixing bracket for deep vein puncture needle for anesthesia, comprising a rectangular frame, characterized in that: two U-shaped frames are symmetrically fixed on both sides of the rectangular frame, and the two U-shaped frames are tied and fixed with binding belts inside, and transverse tensioning mechanisms for tensioning the skin are arranged on both sides of the rectangular frame, and two support rods are symmetrically rotatably connected on the top surface of the rectangular frame, and guide rail holes are opened on the support rods, and semicircular guide rail rings are inserted inside the guide rail holes, and both ends of the guide rail rings are fixed on the top surface of the rectangular frame, and elastic positioning mechanisms for temporarily fixing the support rods on the guide rail rings are arranged inside the support rods;

[0004] A connecting rod is fixed between the two support rods, a first supporting ring is fixed in the middle of the connecting rod, a movable rod is placed above the support rod, a second supporting ring is fixed in the middle of the movable rod, the second supporting ring and the first supporting ring are both semicircular and have opening directions opposite to each other, sliding mechanisms are provided at both ends of the movable rod, the sliding mechanisms are used to make the first supporting ring and the second supporting ring approach each other when the movable rod falls, and a clamping mechanism for clamping the connecting rod and the movable rod is provided between the connecting rod and the movable rod;

[0005] The transverse tensioning mechanism comprises two tensioning plates, which are symmetrically arranged on both sides of the rectangular frame in an eight-shaped shape, and the tensioning plates are rotatably connected to the side walls of the rectangular frame, and a torsion spring is fixedly connected between the rotational connection points at both ends of the tensioning plates and the rectangular frame, one end of the torsion spring is fixed to the tensioning plate, and the other end of the torsion spring is fixed to the side wall of the rectangular frame;

[0006] A longitudinal tensioning mechanism is arranged inside the rectangular frame, and is used to perform longitudinal tensioning on the skin when the tensioning sheet is turned over. The longitudinal tensioning mechanism comprises a rack, a gear, a first strip-shaped through hole and two fifth slide grooves. The gear is fixed to the side of the tensioning sheet and is colinear with the rotation axis of the tensioning sheet and the rectangular frame. The rack is slidably connected to the outer wall of the rectangular frame, and the rack is meshed with the gear. An L-shaped plate is fixed on the top of the rack. The first strip-shaped through hole is opened on the top surface of the rectangular frame. The L-shaped plate is inserted inside the first strip-shaped through hole. The two fifth slide grooves are connected to the outer wall of the rectangular frame. The fifth slide groove is symmetrically opened on the inner wall of the rectangular frame, and two tensioning strips are slidably connected inside the two fifth slide grooves. A second strip through hole is opened on the top surface of both ends of the two tensioning strips, and the second strip through hole is connected with the first strip through hole. A third spring is fixed inside the second strip through hole, and a clamping block is fixed on the top of the third spring. The top end of the clamping block is inserted into the first strip through hole and contacts with the L-shaped plate, and a fourth spring is fixed on the back side of the two tensioning strips, and the ends of the fourth spring are fixed on the inner wall of the rectangular frame.

[0007] The above technical solutions respectively adopt a transverse tensioning mechanism and a longitudinal tensioning mechanism to solve the transverse and longitudinal relaxation of the skin. The structure is quite complicated, and the bracket is large, the operation is cumbersome, difficult to adjust, and the cost is high.

[0008] Especially for the elderly population, venipuncture is a commonly used clinical treatment method and one of the most basic clinical operations for nurses. The success rate of venipuncture in the elderly is lower than that in patients of other age groups. The reason is that the skin of elderly patients is loose and wrinkled, and the skin of elderly and thin patients is thin and pigmented, and the subcutaneous fat tissue is less and atrophied, which makes it easier to slide during puncture, making venipuncture more difficult. The existing method is that two nurses usually cooperate to perform puncture, one to help fix the skin and blood vessels, and the other to perform venipuncture, which can significantly improve the success rate of puncture, but it is relatively more wasteful of manpower. There are also few existing technologies that solve the problem that the skin is wrinkled both vertically and horizontally during venipuncture and is difficult to puncture. Especially for the elderly, after the skin of their arms is stretched horizontally, the severely atrophied arms have more wrinkles along their length, making it difficult to find the location of the blood vessels. Summary of the invention

[0009] The technical problem to be solved by the present invention is to provide a skin tensioning device and a method of using the device, which is simple and compact in structure, easy to adjust, low in cost, saves manpower, and is easy to find and fix the arm veins, in order to address the shortcomings existing in the tensioning of the arm skin during the arm vein puncture process.

[0010] To achieve the above object, the technical solution of the present invention is as follows:

[0011] A skin tensioning device for arm vein puncture, comprising a base plate for supporting the arm, a transverse tensioning mechanism and a longitudinal tensioning mechanism arranged on the base plate for tensioning the skin; the transverse tensioning mechanism comprises a circular ring sleeve arranged on the upper arm to stop bleeding and fix the upper arm, a tensioning structure arranged on the forearm or elbow to laterally tighten the skin, an inflatable armband arranged on the inner surface of the ring sleeve and wrapped around the upper arm, and an inflatable structure for inflating the armband; the ring sleeve and the tensioning structure are respectively arranged at two ends of the base plate, and the longitudinal tensioning mechanism is two and is respectively arranged on the ring wall of the ring sleeve;

[0012] The longitudinal tensioning mechanism includes a torsion spring, a torsion spring rod passing through the torsion spring coil, rollers arranged at both ends of the torsion spring rod, a tensioning sheet arranged on the first torsion arm of the torsion spring for tensioning the skin, a brake member arranged on the second torsion arm of the torsion spring, and an adjusting member arranged on the first torsion arm of the torsion spring and cooperating with the brake member to adjust the relative distance between the tensioning sheet and the skin;

[0013] Arc-shaped through holes are arranged oppositely on the annular walls on both radial sides of the annular sleeve, and the through holes are arranged longitudinally along the arc direction of the annular walls; the longitudinal tensioning mechanism is arranged between the through holes; roller grooves matching with rollers at both ends of the torsion spring rod are respectively opened on the left and right side walls in the through hole, and the roller grooves are arranged longitudinally along the arc direction of the through hole; the torsion spring rod is transversely arranged between the left and right side walls in the through hole and moves up and down along the roller grooves; the brake member is located on the outer surface of the annular sleeve, and the tensioning sheet interacts with the skin through the first torsion arm passing through the through hole; the adjusting member extends to the outside of the through hole;

[0014] When in use, both hands respectively pull the adjusting pieces on both sides of the ring sleeve to move closer to the braking piece, and the adjusting piece drives the first torsion arm to move outward from the ring sleeve, thereby driving the tensioning piece to move outward, and the upper arm is placed in the ring sleeve. The adjusting piece is loosened, and the tensioning piece moves into the ring sleeve and sticks to the skin through the first torsion arm under the torsion force of the torsion spring, and the brake piece is pulled up on the outer surface of the ring sleeve and moves downward along the through hole, so that the tensioning piece drives the wrinkled skin of the arm to slide downward, and after the skin puncture site is radially tightened along the ring sleeve, the brake piece is pressed against the outer surface of the ring sleeve through the second torsion arm under the torsion force of the torsion spring, thereby fixing the longitudinal tensioning mechanism, and inflating the inflatable armband to fix the upper arm and skin in the ring sleeve; after the tensioning structure of the transverse tensioning mechanism tightens the skin along the axial direction of the ring sleeve, intravenous puncture is performed, and the arm can be taken out after puncture.

[0015] Through holes and longitudinal tensioning mechanisms are provided on the walls on both sides of the ring sleeve, which can be adjusted by one person with both hands at the same time, so as to facilitate tightening the middle skin, and will not change the position of the blood vessels, prevent the blood vessels from being deviated by the skin and unable to find the blood vessels, and have a good use effect. During puncture, if the puncture site is on the upper arm, the ring sleeve can be set close to the armpit, and the tensioning structure can be set on the elbow or the forearm; if the puncture site is on the elbow, the ring sleeve can be set at the position of the upper arm close to the elbow, and the tensioning structure can be set on the forearm. The torsion spring is pre-set with a preload, and when the tensioning sheet is pressed against the skin, it is ensured that the first torsion arm and the second torsion arm are both in a stressed state. When the brake member is stationary, the tensioning sheet connected to the first torsion arm is stationary, and under the torsion of the torsion spring, the tensioning sheet is pressed against the skin. The adjusting member is fixedly connected to the first torsion arm, and when the brake member is stationary, the distance between the tensioning sheet and the skin can be adjusted by adjusting the adjusting member. The position of the tensioning sheet on the upper arm is adjusted by adjusting the position of the brake member on the through hole. When tensioning, only the position near the blood vessel to be exposed needs to be tensioned. The longitudinal tensioning mechanism of the present invention can achieve longitudinal tensioning of wrinkled skin by setting an adjusting part and a braking part. It has a simple and practical structure and is easy to operate. The entire longitudinal tensioning mechanism cleverly uses a torsion spring as a core component, which reduces costs. At the same time, only one assistant is needed to complete the tensioning and puncturing of the skin, reducing the use of manpower.

[0016] Preferably, the torsion spring is a double torsion spring, which has a connecting portion between its two spring coils, and the connecting portion is a second torsion arm; the two free end torsion arms of the double torsion spring are first torsion arms, and the two spring coils of the double torsion spring are both mounted on the torsion spring rod.

[0017] By using a double torsion spring, the brake member and the tensioning plate can be easily fixed, and the double torsion spring can make the longitudinal tensioning mechanism have better stability when in use.

[0018] Preferably, the braking member is a transversely arranged brake rod, the second torsion arm is connected to the middle part of the brake rod, and both ends of the brake rod cooperate with the outer surface of the ring sleeve; the adjusting member is a paddle or a transversely arranged adjusting rod, the paddle is fixedly connected to the first torsion arm, and the adjusting rod is fixedly connected to the first torsion arm through a connecting member.

[0019] By setting the brake part as a brake rod and the adjusting part as an adjusting rod, the structure is simple to use, and both the brake rod and the adjusting rod are long, just suitable for finger movement, which is convenient for single or simultaneous adjustment. Similarly, using a paddle is also convenient for simultaneous or individual adjustment. The two ends of the brake rod are against the outer surface of the ring sleeve, and the pressure on the outer wall of the ring sleeve is generated by the torsion force of the torsion spring, and the friction force forms a braking effect together. The structure is simple, and the cross section of the brake rod can be set to a triangular, square or polygonal structure, and one of the faces is always kept in contact with the outer wall of the ring sleeve. Because the outer wall of the ring sleeve is arc-shaped, the brake rod can be prevented from sliding, and a better braking effect can be achieved, which is convenient to use.

[0020] Preferably, a plurality of limit grooves for limiting the up and down movement of the brake rod are transversely arranged on the outer wall of the ring sleeve on both sides of the lower end of the through hole. By arranging the limit grooves on both sides of the lower end of the through hole, the two ends of the brake rod cooperate with the limit grooves, and when the wrinkled skin is tightened, the brake rod is limited in the limit grooves, so that the tensioning sheet is stably attached to the skin, so that the skin is always in a tightened state, which is safer during puncture and prevents the skin from rebounding and losing the tightening effect.

[0021] Preferably, a connecting piece is provided at the free end of the first torsion arm, and the tensioning piece is provided on the connecting piece; a storage plate for placing the connecting piece and the tensioning piece is provided at the upper end of the through hole; when the tensioning piece is not in use, the connecting piece is pressed against the storage plate by the adjustment part and the braking part under the action of the torsion force of the torsion spring.

[0022] By providing a connecting piece, the tensioning piece can be completely attached to the connecting piece, or part of the tensioning piece can be extended from the connecting piece, so that the force-bearing surface of the tensioning piece is larger, and the area in contact with the skin is larger, so that it can generate greater friction with the skin, which is convenient for tightening the skin and more stable to use. If a double torsion spring is used, the first torsion arm has two free ends, and the two free ends can also be connected as a whole through the tensioning piece, so that the entire torsion spring structure is more stable when used, and the pressure on the tensioning piece is more balanced. By providing a storage plate at the upper end of the through hole, when the longitudinal tensioning mechanism is not in use, or when the upper arm is set in the ring sleeve, or when the upper arm is taken out of the ring sleeve, the connecting piece and the tensioning piece can be placed on the storage plate by adjusting the adjusting rod and the brake rod at the same time, so as to prevent the connecting piece and the tensioning piece from scratching the skin. When in use, pinch the brake rod and the adjusting rod at the same time to make the brake rod and the adjusting rod approach each other. The connecting piece is tilted up and higher than the storage plate under the action of the adjusting rod. At the same time, the brake rod leaves the outer surface of the ring sleeve and is manually lifted from the outside of the through hole to the upper end of the through hole so that the connecting piece and the tensioning piece are located above the storage plate. The adjusting rod and the brake rod can be loosened to make the connecting piece and the tensioning piece press against the storage plate. At the same time, the brake part presses against the outer surface of the ring sleeve, and the torsion spring is in a stressed state, so that the entire longitudinal tensioning mechanism is stationary, which is convenient for the execution of other operations. The adjustment can be completed with one hand, and two hands can operate the longitudinal tensioning mechanisms on both sides of the ring sleeve at the same time, which saves manpower, has a simple structure, and is convenient for practical use.

[0023] Preferably, the ring sleeve is divided into part A and part B along the vertical middle; the bottoms of parts A and B are hinged on the bottom plate, and their upper parts are spliced ​​together by buckles; the inflatable armband is disconnected at the upper splicing point of parts A and B.

[0024] By dividing the ring sleeve into part A and part B, when the upper arm is put into the ring sleeve, the ring sleeve can be opened first to facilitate the insertion of the arm and disinfection. After completion, the ring sleeve can be closed by buckling. After the puncture is completed, when the arm is taken out, there is no need to adjust the longitudinal tensioning mechanism to take the arm out. The buckle can be opened directly, and the ring sleeve parts A and B are opened at the same time. The longitudinal tensioning mechanism is also opened and loses its pre-tightening force, which is convenient for the removal of the arm and the operation is easier. The inflatable armband is disconnected at the buckle splicing of parts A and B, and the other parts are connected, which does not affect the inflation effect of the inflatable armband.

[0025] Preferably, the tensioning structure includes a tensioning band pulled toward the hand and a plurality of retracting hooks cooperating with the tensioning band; the plurality of retracting hooks are evenly arranged on both sides of a bottom plate at one end of the forearm; the tensioning band includes an elastic band cooperating with the forearm, and pull rings arranged at both ends of the elastic band and respectively cooperating with the retracting hooks; the elastic band includes a fitting portion in the middle portion that fits with the forearm, and stretching portions arranged at both ends of the fitting portion.

[0026] The skin is longitudinally tensioned under the action of the longitudinal tensioning mechanism, and it is only necessary to tighten the skin of the puncture site, that is, it is only necessary to better tighten the partial position, and since the puncture is generally at the elbow or upper arm, the adjustment ring sleeve is close to the puncture site, and the longitudinal tensioning mechanism can achieve a better tightening effect at the puncture site, and the tensioning structure of the transverse tensioning mechanism can be set on the forearm or the elbow, and it is only necessary to tighten the arm skin transversely. Through the setting of the elastic band, the elastic band is independent, and the staff can adjust the position of the elastic band on the arm as needed. The elastic band is made of elastic material and has elasticity. By tightening the skin transversely through the elastic band, the staff can tighten it according to the degree of force of each person, and the elastic band has the function of an elastic tourniquet. When in use, after the elastic band is close to the skin at the forearm or elbow, the stretching part of the elastic band crosses between the arm and the bottom plate, and then the pull rings at both ends of the tensioning band are hung on the hooks under the force state. The crossed elastic band has a certain hemostatic function, and the inflatable armband of the ring sleeve has a hemostatic function. The blood vessels between the tensioning structure and the ring sleeve are exposed, which is convenient for finding blood vessels. By using the tensioning band, it is easy to adjust flexibly and find the blood vessel position. The structure is simple and easy to use.

[0027] Furthermore, the fitting portion of the elastic band is wider than the stretching portions at both ends thereof along the arm length direction; the stretching portions at both ends of the elastic band protrude toward one side of the fitting portion in a triangular shape, and the center lines of the two stretching portions intersect at the fitting portion to form an angle.

[0028] The center lines of the two extensions of the entire elastic band intersect to form an angle, which generally makes the elastic band triangular. The two stretching parts and the fitting part are not on the same horizontal line, so when the stretching part is pulled toward the hand, it is convenient to form a cross at the bottom of the arm and form a pulling force, thereby pulling the wrinkled skin laterally toward the hand. In addition, the two stretching parts are protruded relative to the fitting part, and when the stretching part is pulled laterally, the fitting part is closer to the skin and more in line with the arm structure, so that the pulling force is more evenly dispersed on the skin, improving the use effect. The width of the fitting part is wider, which increases the contact area between the fitting part and the skin, and the force on the arm is more even, which is comfortable to use.

[0029] Furthermore, the fitting part is provided with a fitting sheet on the side close to the skin. By using the fitting sheet, an anti-skid groove, an anti-skid groove, or an anti-skid protrusion can be provided on the fitting sheet to prevent the tensioning belt from sliding on the arm, thereby ensuring that the tensioning belt is stably arranged on the arm and improving the success rate of puncture.

[0030] Preferably, the roller is a bearing.

[0031] Preferably, the ring sleeve comprises an inner ring and an outer ring, and the inner ring and the outer ring are fixedly connected to each other. By arranging the ring sleeve as an inner ring and an outer ring, that is, the A part and the B part are respectively composed of the inner ring and the outer ring, it is convenient to arrange other structures on the ring sleeve and the through hole, which is convenient for assembly.

[0032] Preferably, an insertion opening for the roller to enter the roller groove is provided on both sides of the upper end of the through hole. By providing the insertion opening on both sides of the upper end of the through hole, the longitudinal tensioning mechanism can be directly inserted, and the roller can directly enter the roller groove through the insertion opening, and the roller groove is arranged vertically, and the longitudinal tensioning mechanism is difficult to escape after being inserted, and when it needs to be disassembled, the longitudinal tensioning mechanism can also be directly taken out, and the structure is convenient for installation and disassembly, and convenient for operation.

[0033] Preferably, the inflatable structure is a foot-operated air pump or a manual air pump. The inflatable armband can be inflated by the inflatable structure, and mechanical inflation can be performed. In the absence of electricity, the disinfection of the entire device is not affected. A deflation structure is also provided on the inflatable structure, and the inflatable armband is deflated by the deflation structure after use.

[0034] A method for using a skin tensioning device for arm vein puncture of the present invention comprises the following steps:

[0035] S1, sleeve arm: before puncture, pull the adjustment piece to drive the first torsion arm, the first torsion arm drives the tensioning plate to move out of the sleeve, and the patient's upper arm is sleeved in the sleeve;

[0036] S2, longitudinal skin tightening: the brake member fixes the position of the torsion spring, the adjusting member is loosened, the tensioning sheet is attached to the skin of the upper arm under the torsion force of the torsion spring, the brake member is pulled on the outer surface of the ring sleeve and moves downward along the through hole so that the tensioning sheet drives the wrinkled skin of the arm to slide downward, and after the skin puncture site is radially tightened in the ring sleeve, the brake member is fixed to the outer surface of the ring sleeve through the second torsion arm under the torsion force of the torsion spring, thereby fixing the longitudinal tensioning mechanism, thereby tightening the wrinkled skin in the longitudinal direction, and inflating the inflatable armband to fix the upper arm and skin in the ring sleeve;

[0037] S3, Horizontal skin tightening: The tensioning structure of the lateral tensioning mechanism tightens the arm skin horizontally toward the hand;

[0038] S4. Puncture and remove the arm: After venipuncture, remove the arm.

[0039] Preferably, the tensioning structure in step S3 includes a tensioning belt and a plurality of retractors matched with the tensioning belt; the plurality of retractors are evenly arranged on both sides of the bottom plate at one end of the forearm; the tensioning belt includes an elastic belt matched with the forearm, and pull rings arranged at both ends of the elastic belt and respectively used in conjunction with the retractors; the elastic belt includes a fitting portion in the middle portion that fits with the forearm, and stretching portions arranged at both ends of the fitting portion; the fitting portion of the elastic belt is wider than the stretching portions at both ends thereof along the length direction of the arm; the stretching portions at both ends of the elastic belt protrude to one side of the fitting portion in a triangular shape, and the center lines of the two stretching portions intersect at the fitting portion to form an angle;

[0040] The steps for tightening the skin horizontally are: fit the fitting part of the elastic band on the upper part of the forearm, and point the protruding stretching part toward the hand, cross the stretching parts on both sides of the fitting part under the forearm, pull the pull rings on the crossed elastic band with both hands to tighten the elastic band on the forearm, and then hang the two pull rings tightly on the hooks on both sides of the bottom plate.

[0041] Preferably, a connecting piece is provided at the free end of the first torsion arm, and the tensioning piece is provided on the connecting piece; a storage plate for placing the connecting piece and the tensioning piece is provided at the upper end of the through hole;

[0042] Before the arm is put on in step S1, the adjusting member is pulled to drive the first torsion arm, and the first torsion arm drives the connecting plate and the tensioning plate to move, and the braking member is pulled to move upward, and the connecting plate and the tensioning plate are placed on the storage plate under the torsion force of the torsion spring.

[0043] When putting the arm on in step S1, the ring is divided into part A and part B. Before inserting the arm, the connecting piece and the tensioning piece can be placed on the plant class first, and then part A and part B are locked; in step S4, when taking out the arm, the ring can be directly opened by the buckle without adjusting the longitudinal tensioning mechanism.

[0044] The skin tensioning device for arm vein puncture of the present invention is easy to install; when the longitudinal tensioning mechanism is used, the skin can be pulled by adjusting the positions of the adjusting member and the brake member on the through hole, and a staff member can adjust the longitudinal tensioning mechanism on both sides of the ring sleeve with both hands at the same time, saving manpower; at the same time, the tensioning belt is used to horizontally tighten the wrinkled skin, which has a simple structure, low cost, and is easy to operate, thereby improving the comfort of the patient; the skin tensioning device has a simple and compact structure, is easy to adjust, has high stability, low cost, saves manpower, and is easy to find the arm vein. The skin tensioning device for arm vein puncture of the present invention has a simple method of use and is easy to adjust. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The contents expressed in the drawings of the specification and the symbols in the drawings are briefly explained:

[0046] Figure 1 is a schematic structural diagram of a skin tensioning device according to an embodiment;

[0047] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0048] Figure 3 for Figure 2 Enlarged view of point B in the middle;

[0049] Figure 4 It is a structural schematic diagram of the longitudinal tensioning mechanism of the embodiment;

[0050] Figure 5 Schematic diagram of the longitudinal skin tensioning process of the embodiment;

[0051] Figure 6 It is a schematic diagram of the structure of the tensioning belt in the embodiment;

[0052] Figure 7 It is a structural schematic diagram of the elastic band of the embodiment when it is unfolded;

[0053] Figure 8 for Figure 6 Side view of

[0054] Fig. 9 This is a schematic diagram of the use state of the skin tensioning device of the embodiment;

[0055] In the figure: 1 is a base plate; 2 is a ring sleeve; 3 is an inflatable armband; 4 is a torsion spring rod; 5 is a bearing; 6 is a first torsion arm; 7 is a tensioning plate; 8 is a second torsion arm; 9 is a through hole; 10 is a roller groove; 11 is a brake rod; 12 is an adjusting rod; 13 is a connecting piece; 14 is a limiting groove; 15 is a connecting plate; 16 is a storage plate; 17 is part A; 18 is part B; 19 is a draw hook; 20 is a pull ring; 21 is a fitting part; 22 is a stretching part; 23 is a tight sheet; 24 is an insertion port; 25 is a foot-operated air pump; 26 is a buckle; 27 is an upper arm; 28 is a forearm; 29 is skin. DETAILED DESCRIPTION

[0056] The present invention is further described below with reference to a non-limiting embodiment of the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concept of the present invention. Example

[0057] like Figure 1 , 2 As shown in Figures 3 and 4, a skin tensioning device for arm vein puncture comprises a base plate 1 for supporting the arm, a transverse tensioning mechanism and a longitudinal tensioning mechanism arranged on the base plate 1 for tensioning the skin 29; the transverse tensioning mechanism comprises a circular ring sleeve 2 for sleeved on the upper arm 27 to stop bleeding and fix the upper arm 27, a tensioning structure arranged on the forearm 28 or the elbow for transversely tensioning the skin 29, an inflatable armband 3 arranged on the inner surface of the ring sleeve 2 and wrapped around the upper arm 27, and a foot-operated air pump 25 for inflating the armband. The ring sleeve 2 and the tensioning structure are respectively arranged at both ends of the base plate 1, and there are two longitudinal tensioning mechanisms, which are respectively arranged on the ring wall of the ring sleeve 2.

[0058] like Figure 1 As shown, the ring sleeve 2 is divided into an A portion 17 and a B portion 18 along the vertical middle; the bottoms of the A portion 17 and the B portion 18 are both hinged on the bottom plate 1, and the upper portions thereof are spliced ​​together by buckles 26; the inflatable armband 3 is disconnected at the upper splicing of the A portion 17 and the B portion 18. The ring sleeve 2 includes an inner ring and an outer ring, which are fixedly connected to each other, and the A portion 17 and the B portion 18 are respectively composed of an inner ring and an outer ring.

[0059] like Figure 4As shown, the longitudinal tensioning mechanism includes a torsion spring, a torsion spring rod 4 passing through the torsion spring coil, rollers arranged at both ends of the torsion spring rod 4, a tensioning sheet 7 arranged on the first torsion arm 6 of the torsion spring to tension the skin 29, a brake member arranged on the second torsion arm 8 of the torsion spring, and an adjusting member arranged on the first torsion arm 6 of the torsion spring to cooperate with the brake member to adjust the relative distance between the tensioning sheet 7 and the skin 29; the roller is a bearing 5; the torsion spring is a double torsion spring, and the double torsion spring has a connecting portion between its two coils, and the connecting portion is the second torsion arm 8; the two free end torsion arms of the double torsion spring are the first torsion arm 6, and the two coils of the double torsion spring are both sleeved on the torsion spring rod 4. The brake member is a transversely arranged brake rod 11, the second torsion arm 8 is connected to the middle of the brake rod 11, and the two ends of the brake rod 11 are matched with the outer surface of the ring sleeve 2; the adjusting member is a transversely arranged adjusting rod 12, and the adjusting rod 12 is fixedly connected to the first torsion arm 6 through a connecting member 13.

[0060] like Figure 1 , 2 As shown in , 3, arc-shaped through holes 9 are arranged on the annular walls on both sides of the ring sleeve 2 in the radial direction, and the through holes 9 are arranged longitudinally along the arc direction of the annular wall; the longitudinal tensioning mechanism is arranged between the through holes 9; roller grooves 10 cooperating with the bearings 5 ​​at both ends of the torsion spring rod 4 are respectively opened on the left and right side walls in the through hole 9, and the roller grooves 10 are arranged longitudinally along the arc direction of the through hole 9, and the torsion spring rod 4 is transversely arranged between the left and right side walls in the through hole 9 and moves up and down along the roller grooves 10; the brake member is located on the outer surface of the ring sleeve 2, and the tensioning sheet 7 interacts with the skin 29 through the first torsion arm 6 passing through the through hole 9; the adjusting member extends to the outside of the through hole 9; as shown in Figure 2 , 3 As shown in Figure 4, a connecting piece 15 is provided at the free end of the first torsion arm 6, and the tensioning piece 7 is provided on the connecting piece 15; a placing plate 16 for placing the connecting piece 15 and the tensioning piece 7 is provided at the upper end of the through hole 9; when the tensioning piece 7 is not in use, the connecting piece 15 is pressed against the placing plate 16 by the adjustment member and the brake member under the torsion force of the torsion spring. The two sides of the upper end of the through hole 9 are provided with an insertion opening 24 for the bearing 5 to enter the roller groove 10. A plurality of limit grooves 14 are transversely provided on the outer wall of the ring sleeve 2 on both sides of the lower end of the through hole 9 to limit the up and down movement of the brake rod 11.

[0061] like Figure 6 , 7As shown in , 8, the tensioning structure includes a tensioning belt pulled toward the hand and a plurality of retractors 19 cooperating with the tensioning belt; the plurality of retractors 19 are evenly arranged on both sides of the bottom plate 1 at one end of the forearm 28; the tensioning belt includes an elastic belt cooperating with the forearm 28, and pull rings 20 arranged at both ends of the elastic belt and used in conjunction with the retractors 19 respectively; the elastic belt includes a fitting portion 21 in the middle part that fits with the forearm 28, and stretching portions 22 arranged at both ends of the fitting portion 21. The fitting portion 21 of the elastic belt is wider than the stretching portions 22 at both ends thereof along the length direction of the arm; the stretching portions 22 at both ends of the elastic belt protrude toward one side of the fitting portion 21 in a triangular shape, and the center lines of the two stretching portions 22 intersect at the fitting portion 21 to form an angle. The fitting portion 21 is provided with a tight sheet 23 on the side that fits closely to the skin 29.

[0062] like Figure 2 , 3 As shown in , 4, and 5a, before use, first squeeze the brake lever 11 and the adjustment lever 12 at the same time to make the connecting piece 15 and the tensioning piece 7 tilt up, push the brake lever 11 upward, and under the action of the torsion spring rod 4 and the bearing 5, the longitudinal tensioning mechanism moves upward, and the connecting piece 15 and the tensioning piece 7 are placed on the storage plate 16. Figure 1 As shown, the buckle 26 of the ring 2 is opened, the A part 17 and the B part 18 are separated, the patient's upper arm 27 is placed in a suitable position between the A part 17 and the B part 18, and the buckle 26 is used to lock the A part 17 and the B part 18 to form the ring 2. Figure 5 As shown in b and 5c, the staff member adjusts the two longitudinal tensioning mechanisms on both sides of the ring sleeve 2 with both hands at the same time, pinches the brake rod 11 and the adjusting rod 12 with one hand, brings the brake rod 11 and the adjusting rod 12 together, and the brake rod 11 is separated from the outer surface of the ring sleeve 2. The connecting piece 15 and the tensioning piece 7 are separated from the storage plate 16 under the action of the adjusting rod 12, and the brake rod 11 and the adjusting rod 12 are pushed downward together. After the connecting piece 15 and the tensioning piece 7 leave the position of the storage plate 16, the adjusting piece is released, and the tensioning piece 7 is tightened under the torsion force of the torsion spring. With the lower body pressed against the skin 29 of the upper arm 27, the brake lever 11 is pulled on the outer surface of the ring sleeve 2 and moves downward along the through hole 9 to make the tensioning sheet 7 drive the wrinkled skin of the arm to slide downward. After the punctured part of the skin 29 is radially tightened in the ring sleeve 2, the brake lever 11 is fixed to the outer surface of the ring sleeve 2 through the second torsion arm 8 under the torsion force of the torsion spring, thereby fixing the longitudinal tensioning mechanism. When fixing, the brake lever 11 can be limited in the corresponding limit groove 14 to prevent the longitudinal tensioning mechanism from sliding up and down, thereby tightening the wrinkled skin in the longitudinal direction. Figure 1 As shown, after the longitudinal tensioning mechanism has completed its work, the inflatable armband 3 is inflated by the foot-operated air pump 25 to fix the upper arm 27 and the skin 29 in the ring sleeve 2. At the same time, the inflatable armband 3 has a hemostatic function, which can make the blood vessels in the arm bulge and become visible.

[0063] like Figure 6 , 7As shown in , 8 and 9, after the inflation is completed, the fitting part 21 of the elastic band is fitted above the forearm 28, and the protruding stretching part 22 is facing the hand, and the stretching parts 22 on both sides of the fitting part 21 are crossed under the forearm 28, and the pull rings 20 on the crossed elastic band are pulled by both hands to tighten the elastic band on the forearm 28, and then the two pull rings 20 are tightly hung on the hooks 19 on both sides of the bottom plate 1. Figure 6 As shown, a close fitting sheet 23 is provided on one side of the close fitting portion 21, and a plurality of anti-slip strips are provided on the close fitting sheet 23. The anti-slip strips contact the skin 29 and generate a large friction, so that the entire tensioning belt is stably arranged on the arm. Figure 7 As shown, the elastic band's fitting portion 21 is relatively wide, and can produce a larger contact area with the skin 29, such as Figure 7 , 8 As shown, the stretching parts 22 on both sides of the fitting part 21 form an angle, and when in use, the stretching part 22 faces the hand side, and then the stretching part 22 is pulled toward the hand side, driving the skin 29 to generate a lateral pulling force, thereby tightening the skin 29 in the lateral direction. Figure 8 As shown, after the fitting part 21 is fitted to the arm, the fitting part 21 of the tensioning band forms a high degree of matching with the arm, so that the force of the entire fitting part 21 is more uniform. After the band skin 29 is tightened laterally, puncture can be performed.

[0064] After the puncture is completed, the tensioning belt is removed, the inflatable armband 3 is deflated, the buckle 26 is opened, the A part 17 and the B part 18 of the ring sleeve 2 are separated, and the arm is taken out. The whole skin tensioning device has a simple structure, is easy to use, has high stability, low cost, and saves manpower.

[0065] In the description of the present invention, it should be understood that if the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like are used to indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 of the present invention. In addition, if the terms "first", "second", etc. appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0066] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

Claims

1. A skin tensioning device for arm vein puncture, characterized in that: It comprises a base plate (1) for supporting an arm, a transverse tensioning mechanism and a longitudinal tensioning mechanism arranged on the base plate (1) for tensioning the skin (29); the transverse tensioning mechanism comprises a circular ring sleeve (2) sleeved on the upper arm (27) for stopping bleeding and fixing the upper arm (27), a tensioning structure arranged on the forearm (28) or the elbow for tensioning the skin (29) transversely, an inflatable armband (3) arranged on the inner surface of the ring sleeve (2) and wrapped around the upper arm (27), and an inflatable structure for inflating the armband; the ring sleeve (2) and the tensioning structure are respectively arranged at two ends of the base plate (1), and the longitudinal tensioning mechanism is two and is respectively arranged on the ring wall of the ring sleeve (2); The longitudinal tensioning mechanism comprises a torsion spring, a torsion spring rod (4) passing through a torsion spring coil, rollers arranged at both ends of the torsion spring rod (4), a tensioning sheet (7) arranged on a first torsion arm (6) of the torsion spring for tensioning the skin (29), a brake member arranged on a second torsion arm (8) of the torsion spring, and an adjusting member arranged on the first torsion arm (6) of the torsion spring for cooperating with the brake member to adjust the relative distance between the tensioning sheet (7) and the skin (29); Arc-shaped through holes (9) are arranged opposite to each other on the annular walls on both radial sides of the annular sleeve (2), and the through holes (9) are arranged longitudinally along the arc direction of the annular wall; the longitudinal tensioning mechanism is arranged between the through holes (9); roller grooves (10) are respectively opened on the left and right side walls inside the through hole (9) to match the rollers at both ends of the torsion spring rod (4), and the roller grooves (10) are arranged longitudinally along the arc direction of the through hole (9); the torsion spring rod (4) is transversely arranged between the left and right side walls inside the through hole (9) and moves up and down along the roller grooves (10); the braking member is located on the outer surface of the annular sleeve (2), and the tensioning sheet (7) interacts with the skin (29) through the first torsion arm (6) passing through the through hole (9); the adjusting member extends to the outside of the through hole (9); The torsion spring is a double torsion spring, and the double torsion spring has a connecting portion between its two spring coils, and the connecting portion is a second torsion arm (8); the two free end torsion arms of the double torsion spring are the first torsion arm (6), and the two spring coils of the double torsion spring are both sleeved on the torsion spring rod (4); A connecting piece (15) is arranged at the free end of the first torsion arm (6), and the tensioning piece (7) is arranged on the connecting piece (15); a storage plate (16) for placing the connecting piece (15) and the tensioning piece (7) is arranged at the upper end of the through hole (9); when the tensioning piece (7) is not in use, the connecting piece (15) is pressed against the storage plate (16) by the adjustment part and the brake part under the torsion force of the torsion spring.

2. A skin tensioning device for arm vein puncture according to claim 1, characterized in that: The brake member is a transversely arranged brake rod (11), the second torsion arm (8) is connected to the middle of the brake rod (11), and both ends of the brake rod (11) cooperate with the outer surface of the ring sleeve (2); the adjustment member is a paddle or a transversely arranged adjustment rod (12), the paddle is fixedly connected to the first torsion arm (6), and the adjustment rod (12) is fixedly connected to the first torsion arm (6) via a connecting member (13).

3. A skin tensioning device for arm vein puncture according to claim 1, characterized in that: The ring sleeve (2) is divided into a portion A (17) and a portion B (18) along the middle portion in the vertical direction; the bottoms of the portion A (17) and the portion B (18) are both hinged on the bottom plate (1), and the upper portions thereof are spliced ​​together via buckles (26); and the inflatable armband (3) is disconnected at the upper splicing point of the portion A (17) and the portion B (18).

4. A skin tensioning device for arm vein puncture according to claim 1, characterized in that: The tensioning structure comprises a tensioning belt pulled toward the hand and a plurality of retracting hooks (19) cooperating with the tensioning belt; the plurality of retracting hooks (19) are evenly arranged on both sides of a bottom plate (1) at one end of a forearm (28); the tensioning belt comprises an elastic belt cooperating with the forearm (28), and pull rings (20) arranged at both ends of the elastic belt and respectively cooperating with the retracting hooks (19); the elastic belt comprises a fitting portion (21) in the middle portion of which fits with the forearm (28), and stretching portions (22) arranged at both ends of the fitting portion (21).

5. A skin tensioning device for arm vein puncture according to claim 4, characterized in that: The fitting portion (21) of the elastic band is wider than the stretching portions (22) at both ends thereof along the arm length direction; the stretching portions (22) at both ends of the elastic band protrude toward one side of the fitting portion (21) in a triangular shape, and the center lines of the two stretching portions (22) intersect at the fitting portion (21) to form an angle.

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