Angiography exosmosis protector

Abstract

The invention discloses an angiography exosmosis protector which comprises an annular belt arranged on an arm in a sleeving mode, the annular belt is not elastic, the annular belt is provided with an elastic air bag mechanism, the air bag mechanism is connected with a piston block type switching mechanism through a catheter, the switching mechanism is installed on a contrast agent tube, and when contrast agent exosmosis makes the arm swell, the air bag mechanism is connected with the piston block type switching mechanism through a catheter. And the air bag mechanism is compressed under the extrusion of the bulge to drive the on-off mechanism to be closed, so that the contrast agent in the contrast agent tube is stopped from being input. The air bag mechanism covers the end part of the needle head, once exosmosis and flow into tissues occur, the air bag mechanism is extruded, the pressure of the air bag mechanism is increased, the switch mechanism is driven to be closed through the catheter, the pressure of the injector is increased, then the injector automatically stops, the air bag mechanism can be filled with gas or liquid, the liquid compression ratio is smaller, and the sensitivity is higher.

Description

Technical Field

[0001] The invention relates to the field of angiography extravasation protection, in particular to an angiography extravasation protector. Background Art

[0002] Direct drug administration through veins is a common method for examining and treating various diseases, such as various common intravenous infusions, CTA examinations, lower extremity venography examinations, etc. in clinical practice. However, direct drug administration through veins also brings many complications, including phlebitis, venous vasospasm, and skin swelling and pain caused by drug extravasation, which often bring a lot of pain to patients and even require surgeons to perform surgery. For ordinary infusion patients who are conscious, the pain caused by drug extravasation will immediately remind the patient of abnormal infusion and then stop the infusion. However, there are some special circumstances in clinical practice that make it impossible to detect drug extravasation in time, which ultimately leads to serious consequences. These special circumstances include: surgical patients under anesthesia, mentally abnormal and agitated patients (such as drunkards), critically ill patients in the intensive care unit, patients in a deep sleep, etc. They are unable to detect problems in time because of abnormal perception of pain caused by early drug extravasation. There are also patients with fast infusion speed, such as patients with pressurized fluid replacement, patients undergoing lower extremity venography with high-pressure injectors, and patients undergoing various CTA examinations. Due to the fast speed of the liquid, it quickly enters the subcutaneous tissue, causing great damage to the patients when it is discovered. Therefore, in clinical work, it is extremely necessary to have a protector that ensures that when extravasation of the drug solution occurs during the infusion process, the infusion device can stop the infusion in time to avoid causing greater pain or even serious consequences to the patients. Summary of the invention

[0003] The object of the present invention is to provide a angiography extravasation protector to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a vascular angiography extravasation protector, comprising a ring band that is sleeved on the arm, the ring band is not elastic, an elastic airbag mechanism is arranged on the ring band, and the airbag mechanism is connected to a piston block type switch mechanism through a catheter, and the switch mechanism is installed on a contrast medium tube. When the contrast medium extravasates and causes the arm to swell, the airbag mechanism is compressed under the squeezing of the swell to drive the switch mechanism to close, so as to stop the contrast medium input in the contrast medium tube. The airbag mechanism covers the end of the needle. Once extravasation occurs and flows into the tissue, the airbag mechanism will be squeezed, the pressure of the airbag mechanism will increase, and through the catheter, the switch mechanism will be driven to close, the pressure of the syringe will increase, and then it will stop automatically. Here, the airbag mechanism can be filled with gas or liquid, and the liquid compression ratio is smaller and the sensitivity is higher.

[0005] Preferably, the airbag mechanism comprises an airbag mounted on an annulus, and a catheter is connected to the airbag. The airbag transmits gas through the catheter.

[0006] Preferably, the switch mechanism comprises a cylinder with a square cross section and an open right end for ventilation, and the left end of the cylinder is connected to a catheter, a matching piston block is installed in the cylinder, and a vertical channel corresponding to the contrast medium tube is provided on the piston block, and a connection port for connecting the contrast medium tube is provided at the upper and lower ends of the cylinder. The contrast medium tube is provided in two parts, the upper and lower parts are connected in the middle by the cylinder, and the middle part corresponds to the channel, and the contrast medium is transmitted through the channel.

[0007] Preferably, a limiting mechanism is provided at the right end of the cylinder to prevent the piston block from sliding out.

[0008] Preferably, the limiting mechanism comprises a blocking piece fixed to the right end of the cylinder body, and the blocking piece limits the piston block from sliding out.

[0009] Preferably, the annular band is provided with an installation port for installing the airbag, and the airbag extends downward to contact the skin after protruding, the annular band is provided with an opening, and a Velcro for adjusting the tightness is provided at the opening to adjust the initial pressure of the airbag, and also includes a friction mechanism provided on the piston block to balance the initial pressure of the airbag. The setting of the installation port is different from the connection of a watch, mainly to allow the annular band to contact the skin, with a large area and more comfortable, and at the same time, the bulge can correspond to the airbag, squeeze the airbag to achieve deformation, ensure that the skin is evenly compressed, and at the same time, the airbag better corresponds to the bulge. The airbag protrudes from the annular band and squeezes toward the skin. The squeezing force of the airbag is adjusted by the Velcro, so as to correspond to the friction mechanism. This adjustment can be determined according to the movement of the piston block during the tightness adjustment. When the piston block is about to move, it means that the pressure is just right, and it can be fixed at this time. A slight deviation will not affect it. The subsequent bulge will still generate pressure, as long as most of the friction is balanced.

[0010] Preferably, the friction mechanism includes a rubber pad fixed to the end of the piston block. The rubber pad plays a role of friction, because the airbag is initially pressurized, so that when it bulges, the airbag will deform immediately, and the detection is more accurate. If there is gas in the airbag, the piston block will be pushed to the far right and cannot be located at the initial position on the left. Therefore, the rubber pad is required to provide initial friction.

[0011] Preferably, the rubber pads are fixed at both ends of the piston block, and the rubber pads are interference fit with the inner wall of the cylinder to achieve elastic sealing. The rubber pads not only play a role of friction, but also elastically press against the inner wall of the cylinder to achieve sealing.

[0012] Preferably, the installation opening is square, and the lower end of the airbag is in a downwardly convex arc shape, which is easy to shrink and convenient for the annular band to contact the skin after squeezing.

[0013] Preferably, the cylinder is made of a transparent material, so as to facilitate observation of the position of the internal piston block.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The ring band is put on the arm, and the air bag covers the end of the needle. Once extravasation occurs and flows into the tissue, it will bulge and then squeeze the air bag. The air bag pressure increases, and the cylinder is ventilated or sterile water is added through the catheter to drive the piston block to move. The piston block is against the baffle. At the same time, the channel and the contrast agent tube are staggered, and the contrast agent cannot be injected into the subcutaneous tissue, preventing the bulge from further expanding. At the same time, the electric injector cannot inject the contrast agent, and the pressure increases. The built-in program will automatically stop it, thereby preventing the contrast agent from continuing to be injected into the subcutaneous tissue, playing a protective role;

[0016] 2. The rubber pad can play a role of friction, balance the initial pressure of the airbag, and at the same time, play a sealing role;

[0017] 3. The setting of the Velcro and the airbag that bulges like the skin can adjust the initial pressure so that the thrust generated by the airbag balances the friction generated by the rubber pad. In this way, when a bulge occurs, a relatively small thrust can push the piston block. In addition, the pressure of the airbag here balances the friction between the piston block and the rubber pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a schematic diagram of the connection between the cylinder and the piston block of the present invention;

[0020] Figure 3 is an axonometric view of the present invention;

[0021] Figure 4 It is an exploded view of the present invention.

[0022] In the figure: 1, annular band; 2, catheter; 3, contrast agent tube; 4, air bag; 5, cylinder; 6, piston block; 7, channel; 8, baffle; 9, mounting port; 10, Velcro; 11, rubber pad. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figures 1 to 4The present invention provides a technical solution for angiography extravasation protector: angiography extravasation protector, comprising a ring band 1 put on the arm, the ring band 1 is not elastic, an elastic airbag mechanism is arranged on the ring band 1, and the airbag mechanism is connected to the piston block type switch mechanism through the catheter 2, and the switch mechanism is installed on the contrast medium tube 3. When the contrast medium extravasates and causes the arm to swell, the airbag mechanism is compressed under the squeezing of the swell to drive the switch mechanism to close, so as to stop the contrast medium input in the contrast medium tube 3. The airbag mechanism covers the end of the needle. Once extravasation occurs, it flows into the tissue, swells, and then squeezes the airbag mechanism. The pressure of the airbag mechanism increases, and the gas is discharged through the catheter 2, driving the switch mechanism to close, the pressure of the syringe increases, and then it stops automatically. Here, the airbag mechanism can be filled with gas or liquid, and the liquid has a smaller compression ratio and higher sensitivity.

[0025] The airbag mechanism includes an airbag 4 mounted on the cuff 1, and the catheter 2 is connected to the airbag 4. The airbag 4 transmits gas through the catheter 2.

[0026] The switch mechanism includes a cylinder 5 with a square cross section and an open right end for ventilation, and the left end of the cylinder 5 is connected to the catheter 2. A matching piston block 6 is installed in the cylinder 5, and the cylinder 5 is made of transparent material. It is convenient to observe the position of the internal piston block 6, and a vertical channel 7 corresponding to the contrast medium tube 3 is opened on the piston block 6. The upper and lower ends of the cylinder 5 are both provided with connection ports for connecting the contrast medium tube 3. The contrast medium tube 3 is set as an upper and lower part, connected in the middle by the cylinder 5, and the middle corresponds to the channel 7, and is transmitted through the channel 7.

[0027] The right end of the cylinder 5 is provided with a limiting mechanism to prevent the piston block 6 from sliding out. The limiting mechanism comprises a baffle 8 fixed to the right end of the cylinder 5 to limit the piston block 6 from sliding out.

[0028] The ring belt 1 is provided with a mounting port 9 for the airbag 4 to be installed, and the airbag 4 extends downward to contact the skin after protruding. The ring belt 1 is provided with an opening, and a Velcro 10 for adjusting the tightness is provided at the opening to adjust the initial pressure of the airbag 4. It also includes a friction mechanism provided on the piston block 6 to balance the initial pressure of the airbag 4. The setting of the mounting port 9 is different from the connection of a watch. It is mainly to allow the ring belt 1 to contact the skin, and the large area is more comfortable. At the same time, the bulge can correspond to the airbag 4, and the airbag 4 is squeezed to achieve deformation, ensuring that the skin is evenly compressed. At the same time, the airbag 4 better corresponds to the bulge. The airbag 4 protrudes from the ring belt 1 and squeezes toward the skin. The squeezing force of the airbag 4 is adjusted by the Velcro 10, so as to correspond to the friction mechanism. This adjustment can be determined according to the movement of the piston block 6 during the tightness adjustment. When the piston block 6 is about to move, it means that the pressure is just right. At this time, it can be fixed. A slight deviation does not affect it. The subsequent bulge will also generate pressure. As long as most of the friction force is balanced, it will be fine. The friction mechanism includes a rubber pad 11 fixed to the end of the piston block 6. The rubber pad 11 plays a role of friction, because the airbag 4 is initially under pressure, so that when it bulges, the airbag 4 will be deformed immediately, and the detection is more accurate. If there is gas in the airbag 4, the piston block 6 will be pushed to the far right and cannot be located at the initial position on the left. Therefore, the rubber pad 11 is needed to provide initial friction. The rubber pad 11 is fixed at both ends of the piston block 6, and the rubber pad 11 and the inner wall of the cylinder 5 are interference fit to achieve elastic sealing. The rubber pad 11 not only plays a role of friction, but also elastically presses against the inner wall of the cylinder 5 to achieve a sealing effect. The installation port 9 is square, and the lower end of the airbag 4 is in a downward convex arc shape. The arc shape is easy to shrink, which is convenient for the annular band 1 to contact the skin after squeezing.

[0029] Working principle: The ring band 1 is put on the arm, and the airbag 4 covers the end of the needle. Once extravasation occurs and flows into the tissue, it will bulge and then squeeze the airbag 4. The pressure of the airbag 4 increases, and the cylinder 5 is ventilated or sterile water is given through the catheter 2, which drives the piston block 6 to move. The piston block 6 is against the baffle 8. At the same time, the channel 7 is staggered with the contrast agent tube 3, and the contrast agent cannot be input into the subcutaneous tissue, preventing the bulge from further expanding. At the same time, the electric injector cannot inject the contrast agent, and the pressure increases. The built-in program will automatically stop it, thereby preventing the contrast agent from continuing to be input into the subcutaneous tissue, which plays a protective role. The rubber pad 11 can play a role of friction, balance the initial pressure of the airbag 4, and at the same time, play a sealing role. The setting of the Velcro 10 and the airbag 4 that bulges like the skin can make the thrust generated by the airbag 4 balance the friction generated by the rubber pad 11 by adjusting the initial pressure. In this way, when a bulge occurs, a relatively small thrust can push the piston block 6. In addition, the pressure of the airbag 4 here balances the friction between the piston block 6 and the rubber pad 11. Therefore, the adjustment of the Velcro 10 can balance the thrust generated by the airbag 4, the friction of the piston block 6 and the friction between the rubber pads 11, so that it is easy to push the piston block 6 to move when a bulge occurs.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An angiographic extravasation protector, comprising a ring band (1) worn on an arm, characterized in that: The annular belt (1) is provided with an elastic airbag mechanism, and the airbag mechanism is connected to a piston block type switch mechanism via a catheter (2). The switch mechanism is installed on the contrast medium tube (3). When the contrast medium extravasates and causes a bulge in the arm, the airbag mechanism is compressed under the pressure of the bulge and drives the switch mechanism to close, thereby stopping the input of contrast medium in the contrast medium tube (3).

2. The angiography extravasation protector according to claim 1, characterized in that: The airbag mechanism comprises an airbag (4) mounted on a cuff (1), and a catheter (2) is connected to the airbag (4).

3. The angiography extravasation protector according to claim 2, characterized in that: The switch mechanism comprises a cylinder (5) with a square cross section and an open right end for ventilation, and the left end of the cylinder (5) is connected to the catheter (2). A matching piston block (6) is installed in the cylinder (5), and a vertical channel (7) corresponding to the contrast agent tube (3) is provided on the piston block (6). The upper and lower ends of the cylinder (5) are both provided with connection ports for connecting the contrast agent tube (3).

4. The angiography extravasation protector according to claim 3, characterized in that: A limiting mechanism is provided at the right end of the cylinder (5).

5. The angiography extravasation protector according to claim 4, characterized in that: The limiting mechanism comprises a blocking piece (8) fixed to the right end of the cylinder (5).

6. The angiography extravasation protector according to claim 5, characterized in that: The ring belt (1) is provided with a mounting opening (9) for mounting the air bag (4), and the air bag (4) extends downward to protrude and contact the skin. The ring belt (1) is provided with an opening, and a Velcro (10) for adjusting tightness is provided at the opening to adjust the initial pressure of the air bag (4). The ring belt (1) also includes a friction mechanism provided on the piston block (6) to balance the initial pressure of the air bag (4).

7. The angiography extravasation protector according to claim 6, characterized in that: The friction mechanism comprises a rubber pad (11) fixed to the end of the piston block (6).

8. The angiography extravasation protector according to claim 7, characterized in that: The rubber pads (11) are fixed to both ends of the piston block (6), and the rubber pads (11) are interference-fitted with the inner wall of the cylinder (5) to achieve elastic sealing.

9. The angiography extravasation protector according to claim 8, characterized in that: The mounting opening (9) is square, and the lower end of the air bag (4) is in a downwardly convex arc shape.

10. The angiography extravasation protector according to claim 3, characterized in that: The cylinder (5) is made of transparent material.

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