PICC guide needle support based on ultrasonic probe

Abstract

This invention discloses a PICC guide needle holder based on an ultrasound probe, comprising an ultrasound probe, a horizontally extending connecting plate on one side of the probe's detection end, an adjustable connecting block on the connecting plate, a positioning bevel on one side of the connecting block, a guide bevel on the other side, a clip for mounting a puncture needle on the guide bevel, and a limiting component for connection with the ultrasound probe on the connecting block. This invention features an adjustable connecting block on the ultrasound probe, utilizing ultrasound to detect the location of blood vessels. The connecting block is rotated to adjust the puncture angle and stabilize the corresponding puncture depth, creating a catheter tunnel at the puncture site. This avoids repeated punctures of blood vessels and provides greater guidance stability during catheter insertion, improving patient comfort.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a PICC guide pin stent based on an ultrasound probe. Background Technology

[0002] Subcutaneous tunneling for PICC catheter placement can effectively reduce the incidence of post-PICC complications such as catheter dislodgement, puncture site infection, and catheter-related bloodstream infection. Compared with conventional placement techniques, it can significantly improve clinical application outcomes. Currently, there are two methods for establishing a subcutaneous tunnel for PICC: the two-needle tunneling method and the one-needle subcutaneous pseudo-tunneling method. The former is relatively complex, labor-intensive, and time-consuming, while the latter requires highly skilled ultrasound technicians for PICC insertion and is difficult to perform; especially when the catheter has a very short subcutaneous tunneling distance, the patient is more prone to catheter dislodgement, catheter displacement, and catheter-related infections. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a PICC guide needle holder based on an ultrasound probe that facilitates rapid establishment of a puncture tunnel, provides stable and easily adjustable puncture depth, and has high safety.

[0004] To solve the above-mentioned technical problems, the present invention adopts a technical solution as follows: a PICC guide needle holder based on an ultrasound probe is provided, including an ultrasound probe, a horizontally extending connecting plate is provided on one side of the probe end of the ultrasound probe, a connecting block is adjustablely provided on the connecting plate, a positioning slope is provided on one side of the connecting block, a guide slope is provided on the other side, a clip for installing a puncture needle is provided on the guide slope, and a limiting component connected to the ultrasound probe is also provided on the connecting block.

[0005] With the above structure, a connecting plate is set on one side of the probe end of the ultrasound probe, and a connecting block is adjustablely set on the connecting plate. The connecting block is provided with a positioning bevel for flipping and adjusting to fit and limit the position, and a guide bevel for fixing the puncture angle. Since the puncture angle is fixed, the depth after puncture is in place is also a fixed value, that is, the requirement of stable puncture depth is achieved. The set clip facilitates tight fit and fixation of the clamping puncture needle, and the set limiting component can prevent the connecting block from flipping on its own under the action of gravity, preventing movement and displacement during the puncture process, thus improving the safety of use.

[0006] For ease of installation, movement, and positioning, preferably, a first positioning hole is provided on one side of the connecting plate, and a relief groove is provided on the connecting block at the position corresponding to the connecting plate. The relief groove has a notch on one side in the axial direction, and a first boss is provided on the groove wall of the relief groove at the position corresponding to the first positioning hole. The connecting plate extends into the relief groove along the notch, and the first boss extends into the first positioning hole. At the same time, the outer wall of the connecting block at the position corresponding to the notch fits and limits the positioning with the outer wall of the ultrasonic probe.

[0007] To facilitate flipping and adjustment, and for use after adjustment, preferably, a first guide groove is provided on the connecting plate at the position corresponding to the first positioning hole on one side, and a second guide groove is provided on the connecting plate at the position corresponding to the first positioning hole on the other side. A second positioning hole is provided on the other side of the second guide groove. A second boss is provided on the groove wall of the relief groove at the position corresponding to the second positioning hole. The second boss and the first boss are symmetrically arranged. The first boss moves through the second guide groove to the position of the second positioning hole and extends into the second positioning hole. Then, the connecting block is rotated so that the outer wall of the positioning slope fits and limits the positioning with the outer wall of the ultrasonic probe.

[0008] To facilitate adjustment and ensure smooth adjustment, the second guide groove preferably includes a first connecting groove, a second connecting groove, and a third connecting groove that are sequentially connected. The first connecting groove is connected to the first positioning hole and is perpendicular to the first guide groove. The third connecting groove is connected to the second positioning hole.

[0009] To facilitate quick adjustment and simplify the structure, preferably, the second connecting groove and the first connecting groove are connected at a right angle, and the third connecting groove and the second connecting groove are also connected at a right angle, with the second positioning hole located above the first positioning hole.

[0010] To facilitate flipping and avoid interference, the bottom of the clearance groove is preferably a sloping structure, and the notch is located at the lower end of the sloping structure.

[0011] To prevent the connecting block from shifting and to facilitate its use after being flipped and adjusted, preferably, a limiting pin is provided on the end face of the extended end of the connecting plate, and a limiting oblique hole is provided on the groove wall of the relief groove at the position corresponding to the limiting pin. The limiting pin extends into the limiting oblique hole to limit the connecting block after it has been flipped and adjusted.

[0012] To facilitate the installation and use of puncture needles of various sizes, the clip is preferably a cylindrical structure with an opening on one side along the axial direction of the clip.

[0013] To simplify the structure and facilitate installation, preferably, the limiting component includes a hook hinged to the outer wall of the connecting block, and a hanging ring is provided on the outer wall of the ultrasonic probe at the position corresponding to the hook. The hook and the hanging ring are connected and the outer end face of the connecting block at the position corresponding to the notch is in contact with the outer wall of the ultrasonic probe to achieve connection and positioning between the connecting block and the ultrasonic probe.

[0014] To simplify the structure and facilitate use, a limiting protrusion is preferably provided on the outer side wall of one side of the puncture needle. In use, the limiting protrusion abuts against the outer side wall of the connecting block, and the outer side of the limiting protrusion is pressed with a finger to prevent the puncture needle from shifting outward under force after piercing the skin.

[0015] Beneficial effects: The present invention features an adjustable connecting block on the ultrasound probe. By using ultrasound to detect the position information of blood vessels, the connecting block can be flipped to adjust the puncture angle and stabilize the corresponding puncture depth. Furthermore, a catheter tunnel is established at the puncture site. This avoids repeated puncture of blood vessels and provides greater guidance stability when the catheter is inserted into the blood vessel, thus improving the patient's comfort during diagnosis and treatment. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a schematic diagram of the installation structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the connecting block.

[0019] Figure 3 for Figure 2 View A in the diagram.

[0020] Figure 4 for Figure 2 View B in the diagram.

[0021] Figure 5 This is a diagram showing the usage state of the present invention.

[0022] The meanings of the labels in the attached diagram are as follows:

[0023] Ultrasonic probe-1; connecting plate-10; first guide groove-101; second guide groove-102; first connecting groove-1021; second connecting groove-1022; third connecting groove-1023; limiting pin-103; hanging ring-104; first positioning hole-11; second positioning hole-12;

[0024] Connecting block-2; clearance groove-20; notch-201; limiting oblique hole-202; positioning oblique surface-21; guide oblique surface-22; sleeve-23; first boss-24; second boss-25;

[0025] Hook-3; Limiting protrusion-31. Detailed Implementation

[0026] Depend on Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the present invention includes an ultrasonic probe 1, a horizontally extending connecting plate 10 is provided on one side of the probe end of the ultrasonic probe 1, a connecting block 2 is adjustablely provided on the connecting plate 10, a positioning inclined surface 21 is provided on one side of the connecting block 2, a guide inclined surface 22 is provided on the other side, a clip 23 for installing a puncture needle (not shown) is provided on the guide inclined surface 22, the clip 23 is a cylindrical structure, and an opening is provided on one side of the clip 23 along the axial direction of the clip 23; a limiting component connected to the ultrasonic probe 1 is also provided on the connecting block 2.

[0027] Specifically, a first positioning hole 11 is provided on one side of the connecting plate 10, and a relief groove 20 is provided on the connecting block 2 at the position corresponding to the connecting plate 10. The relief groove 20 has a notch 201 on one side in the axial direction. The bottom of the relief groove 20 is a sloped structure, and the notch 201 is located at the lower end of the sloped structure. A first boss 24 is provided on the groove wall of the relief groove 20 at the position corresponding to the first positioning hole 11. The connecting plate 10 extends into the relief groove 20 along the position of the notch 201, and the first boss 24 extends into the first positioning hole 11. At the same time, the outer wall of the connecting block 2 at the position corresponding to the notch 201 fits and limits the movement with the outer wall of the ultrasonic probe 1.

[0028] A first guide groove 101 is connected to one side of the connecting plate 10 corresponding to the first positioning hole 11. A second guide groove 102 is connected to one side of the connecting plate 10 corresponding to the first positioning hole 11. A second positioning hole 12 is connected to the other side of the second guide groove 102. A second boss 25 is provided on the groove wall of the relief groove 20 corresponding to the second positioning hole 12. The second boss 25 and the first boss 24 are symmetrically arranged. The first boss 24 moves to the position of the second positioning hole 12 through the second guide groove 102 and extends into the second positioning hole 12. Then, the connecting block 2 is rotated so that the outer wall of the positioning inclined surface 21 fits and limits the positioning with the outer wall of the ultrasonic probe 1.

[0029] The second guide groove 102 includes a first connecting groove 1021, a second connecting groove 1022, and a third connecting groove 1023 arranged in sequence. The first connecting groove 1021 is arranged in connection with the first positioning hole 11 and is perpendicular to the first guide groove 101. The third connecting groove 1023 is arranged in connection with the second positioning hole 12. The second connecting groove 1022 is connected to the first connecting groove 1021 at a right angle, and the third connecting groove 1023 is also connected to the second connecting groove 1022 at a right angle. The second positioning hole 12 is located above the first positioning hole 11.

[0030] A limiting pin 103 is provided on the end face of the extended end of the connecting plate 10, and a limiting oblique hole 202 is provided on the groove wall of the relief groove 20 at the position corresponding to the limiting pin 103. The limiting pin 103 extends into the limiting oblique hole 202 to limit the connecting block 2 after it has been flipped and adjusted.

[0031] The limiting component includes a hook 3 hinged to the outer wall of the connecting block 2, and a hanging ring 104 is provided on the outer wall of the ultrasonic probe 1 at the position corresponding to the hook 3. The hook 3 is hooked to the hanging ring 104, and the outer end face of the connecting block 2 at the position corresponding to the notch 201 is in contact with the outer wall of the ultrasonic probe 1 to realize the connection and positioning between the connecting block 2 and the ultrasonic probe 1.

[0032] A limiting protrusion 31 is provided on the outer side wall of one side of the puncture needle. When in use, the limiting protrusion 31 abuts against the outer side wall of the connecting block 2. Press the outer side of the limiting protrusion 31 with your finger to prevent the puncture needle from moving outward under force after it pierces the skin.

[0033] The specific operating principle of this invention is as follows:

[0034] Due to individual differences among patients, there are various depths of vascular puncture. In this example, puncture depths of 2cm and 1.5cm are used as examples for illustration.

[0035] like Figures 1 to 4 As shown, before use, the location and depth of the patient's blood vessels are detected using the ultrasound probe 1, taking a blood vessel at a subcutaneous depth of 2cm as an example, and the puncture site is selected. Then, the connecting block 2 is installed on the connecting plate 10. Specifically, the first protrusion 24 is moved from the first guide groove 101 into the first connecting groove 1021 in the second guide groove 102. Then, the connecting block 2 is pushed horizontally, and the first protrusion 24 is moved into the first positioning hole 11 located on one side of the connecting plate 10. At this time, the second protrusion 25 abuts against the outer wall of the connecting plate 10 at the position corresponding to the first positioning hole 11 on the other side. At the same time, the outer wall of the connecting block 2 at the position corresponding to the notch 201 fits and limits the movement with the outer wall of the ultrasound probe 1. That is, in Figure 1In the middle, the left vertical end face of the connecting block 2 is in contact with the outer wall of the ultrasonic probe 1; then, the hinged hook 3 is rotated and hooked to the hanging ring 104 to realize the connection and positioning between the connecting block 2 and the ultrasonic probe 1.

[0036] Subsequently, a puncture needle is inserted into the clip 23. The inner diameter of the clip 23 and the outer diameter of the puncture needle are tightly fitted together, and the limiting protrusion 31 abuts against the outer wall of the connecting block 2. In this way, when in use, pressing the outer side of the limiting protrusion 31 with a finger can prevent the puncture needle from shifting outward after being inserted into the skin.

[0037] Since the angle of the guide slope 22 is a fixed value, the puncture end of the puncture needle extends obliquely downward. After the puncture needle is inserted into the subcutaneous tissue and into the blood vessel, there will be continuous blood return at the needle hole position on the outside of the puncture needle. At this time, it indicates that the needle has been punctured into the blood vessel at a depth of 2cm under the skin. Immediately stop pushing the connecting block 2, that is, stop the insertion of the puncture needle, and slowly send the guide wire into the blood vessel through the puncture needle.

[0038] After the guidewire is inserted to a certain length and in the correct position, the puncture needle is withdrawn, leaving the guidewire in the body. An appropriate amount of local anesthetic is then drawn up with a syringe and applied to the puncture site for infiltration anesthesia. A dilator is then inserted along the guidewire, rotated to expand the subcutaneous tissue, and inserted into the blood vessel. Finally, the guidewire is pulled out, and the PICC catheter is inserted into the blood vessel through the dilator. The position of the PICC catheter in the blood vessel is adjusted, the dilator is pulled out, and the PICC catheter is secured externally to the patient. In this way, the puncture needle is directly inserted into the target blood vessel in one step. Based on this, a subcutaneous tunnel for PICC catheter insertion can be quickly established, which not only improves the efficiency of PICC catheter insertion but also allows the PICC catheter to extend a longer distance into the blood vessel, reducing the risk of dislodgement and ensuring stability and safety during use.

[0039] During the aforementioned process, the procedure after inserting the guidewire into the blood vessel is the same as the existing puncture procedure, and other related ancillary procedures will not be described in detail here.

[0040] For example, in subcutaneous blood vessel locations where the puncture depth is 1.5cm, Figures 2 to 5 As shown, unlike the previous embodiment, the first boss 24 moves through the first guide groove 101 into the first connecting groove 1021 in the second guide groove 102. The connecting block 2 is rotated clockwise and then pushed so that the first boss 24 moves through the second connecting groove 1022 and the third connecting groove 1023 into the second positioning hole 12 located on one side of the connecting plate 10. At this time, the second boss 25 abuts against the outer wall of the connecting plate 10 at the position corresponding to the second positioning hole 12 on the other side. At the same time, the limiting pin 103 extends into the limiting inclined hole 202 to limit the movement of the connecting block 2, and the outer wall of the positioning inclined surface 21 fits against the outer wall of the ultrasonic probe 1 for limiting (e.g., Figure 5(as shown in the diagram); at this time, the rotating hinged hook 3 is located away from the hanging ring 104.

[0041] Following the same procedure as described above, the puncture needle is then placed at the position of the clip 23, and the limiting protrusion 31 is made to abut against the outer wall of the connecting block 2. After the puncture needle is inserted into the subcutaneous tissue and into the blood vessel, there will be continuous blood return at the needle hole position on the outside of the puncture needle. At this time, it indicates that the needle has been punctured into the blood vessel at a depth of 1.5cm under the skin. Immediately stop pushing the connecting block 2, that is, stop the insertion of the puncture needle, and slowly insert the guide wire into the blood vessel through the puncture needle.

[0042] Since the guidewire diameter is compatible with the inner diameter of the puncture needle, the purpose of blocking blood return is achieved at the same time as the guidewire is inserted. This operation is consistent with the existing operation techniques and will not be described in detail here.

[0043] In the second embodiment, due to the flipping of the connecting block 2, the change in the angle between the guide slope 22 and the horizontal plane synchronously drives the change in the puncture angle of the puncture needle, causing the puncture depth to change accordingly and become shallower than that in the first embodiment (e.g., Figure 5 As shown, the bottom dotted line indicates the puncture site at 2cm. By setting the length of the connecting block 2 and the angle of the guide slope 22, it is possible to calculate and set the parameters to allow a single needle to directly puncture a blood vessel at a subcutaneous depth of 1.5cm.

[0044] In the two embodiments described above, after the puncture needle is inserted into the subcutaneous tissue, the doctor can simultaneously move the ultrasound probe 1 horizontally along the projection of the puncture needle insertion direction while holding the connecting block 2, and gradually move it closer to the skin. When the ultrasound probe 1 touches the skin, it is also the location where the blood vessel is punctured. This, together with the blood return at the puncture needle location, serves as a condition for judging whether the puncture is in place, making the puncture operation more accurate.

[0045] Similarly, 0.5cm and 1cm are also commonly used for vascular puncture depth. The specific settings for their combined use are the same as those mentioned above. The length of the connecting block 2, the slope of the positioning slope 21, the slope of the guide slope 22, and the orientation of the second guide groove 102 should be determined according to the specific application, and will not be elaborated here.

Claims

1. A PICC guide pin holder based on an ultrasonic probe, comprising an ultrasonic probe (1), characterized in that: A horizontally extending connecting plate (10) is provided on one side of the detection end of the ultrasonic probe (1). A connecting block (2) is adjustable on the connecting plate (10). A positioning slope (21) is provided on one side of the connecting block (2), and a guide slope (22) is provided on the other side. A first positioning hole (11) is provided on one side of the connecting plate (10). A relief groove (20) is provided on the connecting block (2) at the position corresponding to the connecting plate (10). The bottom of the relief groove (20) is a slope structure. A notch (201) is provided at the lower end of the slope structure. A first boss (24) is provided on the groove wall of the relief groove (20) at the position corresponding to the first positioning hole (11). The connecting plate (10) extends into the relief groove (20) along the position of the notch (201), and the first boss (24) extends into the first positioning hole (11). At the same time, the outer wall of the connecting block (2) at the position corresponding to the notch (201) fits and limits the movement with the outer wall of the ultrasonic probe (1). A first guide groove (101) is provided on the connecting plate (10) at one side corresponding to the first positioning hole (11). A second guide groove (102) is provided on the connecting plate (10) at one side corresponding to the first positioning hole (11). A second positioning hole (12) is provided on the other side of the second guide groove (102). A second boss (25) is provided on the wall of the relief groove (20) at the position corresponding to the second positioning hole (12). The second boss (25) and the first boss (24) are symmetrically arranged. The first boss (24) moves to the position of the second positioning hole (12) through the second guide groove (102) and extends into the second positioning hole (12). Then, the connecting block (2) is rotated so that the outer wall of the positioning slope (21) fits and limits the positioning with the outer wall of the ultrasonic probe (1). A clip (23) for installing a puncture needle is provided on the guide slope (22), and a limiting component for connecting to the ultrasound probe (1) is also provided on the connecting block (2).

2. The PICC guide pin holder based on an ultrasound probe as described in claim 1, characterized in that: The second guide groove (102) includes a first connecting groove (1021), a second connecting groove (1022) and a third connecting groove (1023) arranged in sequence. The first connecting groove (1021) is arranged in connection with the first positioning hole (11) and is perpendicular to the first guide groove (101). The third connecting groove (1023) is arranged in connection with the second positioning hole (12).

3. A PICC guide pin holder based on an ultrasound probe as described in claim 2, characterized in that: The second connecting groove (1022) is connected to the first connecting groove (1021) at a right angle, and the third connecting groove (1023) is also connected to the second connecting groove (1022) at a right angle, and the second positioning hole (12) is located above the first positioning hole (11).

4. The PICC guide pin holder based on an ultrasound probe as described in claim 1, characterized in that: A limiting pin (103) is provided on the end face of the extended end of the connecting plate (10), and a limiting oblique hole (202) is provided on the groove wall of the relief groove (20) at the position corresponding to the limiting pin (103). The limiting pin (103) extends into the limiting oblique hole (202) to limit the connecting block (2) after it has been flipped and adjusted.

5. A PICC guide pin holder based on an ultrasound probe as described in claim 1, characterized in that: The sleeve (23) is a cylindrical structure, and one side of the sleeve (23) has an opening along the axial direction of the sleeve (23).

6. A PICC guide pin holder based on an ultrasound probe as described in claim 3, characterized in that: The limiting component includes a hook (3) hinged to the outer wall of the connecting block (2), and a hanging ring (104) is provided on the outer wall of the ultrasonic probe (1) at the position corresponding to the hook (3). The hook (3) is connected to the hanging ring (104), and the outer end face of the connecting block (2) at the position corresponding to the notch (201) is in contact with the outer wall of the ultrasonic probe (1) to realize the connection and positioning between the connecting block (2) and the ultrasonic probe (1).

7. A PICC guide pin holder based on an ultrasound probe as described in claim 1, characterized in that: A limiting protrusion (31) is provided on the outer side wall of one side of the puncture needle. When in use, the limiting protrusion (31) abuts against the outer side wall of the connecting block (2). Press the outer side of the limiting protrusion (31) with your finger to prevent the puncture needle from moving outward under force after being inserted into the skin.

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