CN107638615B - Ventricular wall injection auxiliary instrument - Google Patents
Ventricular wall injection auxiliary instrument Download PDFInfo
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- CN107638615B CN107638615B CN201710697881.0A CN201710697881A CN107638615B CN 107638615 B CN107638615 B CN 107638615B CN 201710697881 A CN201710697881 A CN 201710697881A CN 107638615 B CN107638615 B CN 107638615B
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Abstract
The invention discloses a ventricular wall injection auxiliary instrument which comprises a flexible belt-shaped main body, wherein the belt-shaped main body is made of biocompatible materials, a plurality of positioning holes are distributed in the belt-shaped main body, a plurality of vacuum chucks are arranged on the back surface of the belt-shaped main body, and the positions of the vacuum chucks and the positioning holes are not overlapped. In the ventricular wall injection auxiliary instrument, the vacuum chuck is detachably connected with the outer surface of the heart to fix the strip-shaped main body on the outer surface of the heart, and an operator can respectively inject non-contractive substances such as hydrogel and the like into different areas of the ventricular wall through the positioning hole and the injection needle, so that the positioning precision of an injection point is effectively improved, the operation time is shortened, and the residual pigment pollution in a patient body is avoided.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to an auxiliary instrument for ventricular wall injection.
Background
Heart failure, or heart failure for short, refers to the condition of circulatory disturbance of the heart caused by the failure of systolic and/or diastolic function of the heart, which can not fully discharge the venous return blood from the heart, resulting in stasis of blood in the venous system and insufficient perfusion of blood in the arterial system. The existing treatment methods, such as traditional drug therapy, auxiliary devices, and heart transplantation, face many difficulties, such as: many patients have recurrent symptoms after traditional drug therapy, cardiac resynchronization therapy is not suitable for all patients and is partially poorly responsive, and donor sources for heart transplantation are very limited.
The implantable hydrogel is a novel heart failure treatment technology, and particularly relates to a technology for opening the chest through a small incision and injecting non-contractile substances such as self-coagulability and biocompatibility hydrogel and the like into the wall of the left ventricle so as to change the geometric mechanism and myocardial tension of the myocardium, reduce the tension of myocardial fibers, improve the oxygen consumption and reconstruction of the myocardium, improve the cardiac function and delay or reverse the heart failure process of a patient with the enlarged left ventricle.
The current implantable hydrogel surgery essentially comprises the following steps: a left intercostal incision is made by the surgeon, exposing the heart; confirming that the middle horizontal line of the left ventricle is an injection part, drawing a straight line on the ventricular wall surface of the left ventricle by using a surgical marking pen to be used as a marking line, marking a plurality of injection points by using the marking pen on the upper side and the lower side which are about 1-2 cm away from the marking line and avoid visible blood vessels, wherein the distance between every two injection points is about 1-2 cm, and then respectively injecting hydrogel into the ventricular wall by using a needle through every injection point. In the operation process, in order to reduce the injury to a patient as much as possible, the size of a wound for opening the chest needs to be strictly controlled, and operations such as marking, injection and the like are performed in an incision as small as possible; in the whole operation process, the heart is in a beating state all the time, the operation that a doctor uses a marking pen to mark a marking line and a positioning point on the surface of the heart is difficult, the operation time can be greatly prolonged, and the risk of a patient is increased; and the heart can be exposed to air for a long time, which can cause a large trauma to the patient. Meanwhile, the pigment used for marking can also be diffused and even fall off in the process of heartbeat, so that the injection point of the marking is blurred and even disappears, repeated marking needs to be performed for many times, the operation difficulty is further increased, and the marking precision is influenced. In addition, the marking pigments remain in the body of the patient after falling off, cannot be completely discharged out of the body along with the metabolism of the patient, cause pollution in the body and increase biological risks.
In conclusion, the existing ventricular wall injection method has the problems of long operation time, inconvenient injection point marking operation, inaccurate injection point positioning, marking pigment pollution and the like.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a ventricular wall injection auxiliary device which is convenient to use and can be quickly combined with or detached from the outer surface of the heart, so as to effectively improve the positioning precision of the injection point, assist the operator to quickly and accurately inject hydrogel into the ventricular wall, shorten the operation time, and avoid the residual pigment pollution in the patient.
The technical scheme adopted by the invention to solve the technical problem is as follows:
a ventricular wall injection auxiliary instrument comprises a flexible belt-shaped main body, wherein the belt-shaped main body is made of a biocompatible material, a plurality of positioning holes are distributed on the belt-shaped main body, a plurality of vacuum suction cups are arranged on the back surface of the belt-shaped main body, and the positions of the vacuum suction cups and the positioning holes are not coincident. Therefore, an operator can place the strip-shaped main body on the surface of the heart of a patient, connect the strip-shaped main body with the surface of the heart through the vacuum chuck, and respectively inject non-contractive substances such as hydrogel and the like to different areas of the ventricular wall through the positioning hole and the injection needle, so that the thickness of the ventricular wall is increased, the tension of myocardial fibers is reduced, the heart function is improved, and the heart failure process of the patient is delayed or treated. The belt-shaped main body is connected with the surface of the heart through the vacuum chuck, so that the belt-shaped main body and the heart can be prevented from shifting caused by the heart beating or the action of an operator, and the accurate positioning of an injection point is further influenced; and after the injection is finished, the connection between the vacuum sucker and the outer surface of the heart can be quickly released, and the strip-shaped main body is withdrawn from the body of the patient.
In the ventricular wall injection assisting device, preferably, the plurality of vacuum suction cups are uniformly distributed on the longitudinal central line of the back surface of the belt-shaped main body or the plurality of vacuum suction cups are distributed at four corners or four sides of the belt-shaped main body.
In the ventricular wall injection auxiliary device, the vacuum chuck is preferably a single-layer flat chuck or a deep concave chuck.
In the ventricular wall injection auxiliary device, the vacuum chuck is preferably made of rubber, silicone rubber, polyurethane, nitrile rubber or vinyl-containing polymer.
In the ventricular wall injection auxiliary device, the length range of the belt-shaped main body is preferably 50-80mm, the width range is preferably 15-25mm, and the thickness range is preferably 1-2 mm.
In the ventricular wall injection auxiliary device, the positioning holes are preferably through holes with a diameter greater than or equal to 4mm, and the number of the positioning holes is 4 to 16.
In the ventricular wall injection auxiliary device, preferably, the plurality of positioning holes are distributed in at least one row on the belt-shaped main body, and the longitudinal distance between two adjacent positioning holes ranges from 12 mm to 18 mm.
In the ventricular wall injection auxiliary device, preferably, the plurality of positioning holes are distributed in two rows on the belt-shaped main body in parallel, the transverse distance range between the two rows of positioning holes is 12-20mm, and the longitudinal distance range between two adjacent positioning holes in each row is 12-18 mm.
In the ventricular wall injection auxiliary instrument, preferably two rows of positioning holes are selected, and the upper row of positioning holes and the lower row of positioning holes are correspondingly arranged or staggered; the connecting line between the upper row of positioning holes and the lower row of positioning holes which are correspondingly arranged is vertical to the longitudinal center line of the belt-shaped main body, and the included angle range between the connecting line between the upper row of positioning holes and the lower row of positioning holes which are staggered and a straight line vertical to the longitudinal center line is 25-35 degrees.
In the ventricular wall injection auxiliary device, preferably, a plurality of auxiliary holes with smaller diameters are uniformly distributed around each positioning hole, each positioning hole and the plurality of auxiliary holes around the positioning hole form a positioning area, the diameter of the smallest enclosing circle of each positioning area is greater than or equal to 4mm, and the smallest enclosing circles of the plurality of positioning areas do not intersect with each other. The aforementioned minimum enclosing circle is a circle having the smallest area among circles that can enclose the pilot hole in a certain pilot region and all the pilot holes around the pilot hole.
Compared with the prior art, the ventricular wall injection auxiliary instrument has the following beneficial effects:
(1) the positioning precision of ventricular wall injection is improved;
(2) the operation is simple and convenient, the belt-shaped main body of the ventricular wall injection auxiliary device is connected with the surface of the heart through the vacuum chuck, and the accurate positioning of an injection point can be prevented from being influenced by the heart pulsation or the action of an operator;
(3) after the injection is finished, the connection between the vacuum sucker and the outer surface of the heart can be quickly released, and the strip-shaped main body is withdrawn out of the body of the patient, so that the operation time is saved;
(4) avoid the pigment pollution used when marking the injection point.
Drawings
Fig. 1a to 1c are schematic structural views of a ventricular wall injection assisting apparatus according to a first embodiment of the present invention, wherein fig. 1a is a schematic front view, and fig. 1b and 1c are side views respectively;
fig. 2a and 2b are schematic views of a vacuum chuck in a ventricular wall injection assisting apparatus according to a first embodiment of the present invention, wherein fig. 2a is a front view, and fig. 2b is a sectional view taken along a line a-a in fig. 2 a;
fig. 3a and 3b are schematic structural views of a ventricular wall injection assisting apparatus according to a second embodiment of the present invention, in which fig. 3a is a front view and fig. 3b is a side view;
fig. 4a and 4B are schematic views of a vacuum chuck in a ventricular wall injection assisting apparatus according to a second embodiment of the present invention, wherein fig. 4a is a front view, and fig. 4B is a sectional view taken along the direction B-B in fig. 4 a;
FIG. 5 is a schematic structural diagram of a ventricular wall injection assisting apparatus according to a third embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a ventricular wall injection assisting apparatus according to a fourth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a ventricular wall injection assisting apparatus according to a fifth embodiment of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Orientation definition: for convenience of description, a position close to the operator is hereinafter defined as a proximal end, and a position far from the operator is hereinafter defined as a distal end.
In the present invention, the longitudinal direction of the belt-like body is defined as a longitudinal direction, and the direction perpendicular to the longitudinal direction is defined as a lateral direction.
Example one
Referring to fig. 1a to 1c, the ventricular wall injection assist device of the present embodiment includes a band-shaped body 100 having flexibility. The band-shaped body 100 is made of a biocompatible material, and a plurality of positioning holes 101 are distributed on the band-shaped body 100. The belt-like body 100 is provided with a plurality of vacuum pads 102 on the rear surface thereof, and the vacuum pads 102 do not overlap the positioning holes 101. During operation, an operator can place the strip-shaped main body 100 on the surface of the heart of a patient, connect the strip-shaped main body 100 with the surface of the heart through the vacuum chuck 102, and inject non-contractile substances such as hydrogel and the like into different areas of the ventricular wall through the positioning holes 101 respectively, so that the thickness of the ventricular wall is increased, the tension of cardiac fibers is reduced, the heart function is improved, and the heart failure process of the patient is delayed or treated. Because the belt-shaped main body 100 is connected with the surface of the heart through the vacuum chuck 102, the belt-shaped main body 100 can be prevented from deviating from the heart due to the heart beating or the action of an operator, and the accurate positioning of an injection point is further influenced; and after the injection is finished, the connection between the vacuum suction cup 102 and the outer surface of the heart can be quickly released, and the band-shaped main body 100 is withdrawn out of the patient body.
Referring to fig. 1a, the band-shaped body 100 is made of a biocompatible material having flexibility, and the band-shaped body 100 in this embodiment is made of silicone rubber having a hardness of 10A. The band-shaped body 100 has a length ranging from 50 to 80mm, a width ranging from 15 to 25mm, and a thickness ranging from 1 to 2 mm. In this embodiment, the band-shaped body 100 has a length of 70mm, a width of 25mm, and a thickness of 1.5 mm.
In order to avoid damaging the heart surface, the corners of the belt-shaped main body 100 are all set to be arc-shaped, and the radius of the arc is about 4 mm.
The band-shaped body 100 is provided with a plurality of positioning holes 101, the number of the positioning holes 101 is related to the size of the heart of the patient, and the number of the positioning holes 101 is usually 4 to 16, preferably 6 to 13. The plurality of sprocket holes 101 are distributed in at least one row on the belt body 100. In the present embodiment, the number of the positioning holes 101 is 6, and the 6 positioning holes 101 are uniformly distributed on the longitudinal center line of the belt-shaped body 100. The longitudinal distance between two adjacent pilot holes 101 is in the range of 12-18mm, in this embodiment 15 mm. The reason for so setting up is that, the hydrogel can increase the thickness of ventricular wall rapidly and effectively after injecting in a plurality of regions on the ventricular wall of patient's heart, alleviates heart failure, but the injection point is too intensive, again causes too much damage to patient's heart, consequently, reaches treatment after the hydrogel injection can be guaranteed to 6 injection points of longitudinal separation 15mm, avoids the excessive damage that leads to patient's heart many times injection simultaneously.
The positioning hole 101 is a through hole having a diameter of 4mm or more. In this embodiment, the diameter of the through-hole is 5 mm. The reason for this arrangement is that the diameter of the coronary artery distributed in the middle of the left ventricle of the heart at the part to be injected is usually less than 4mm, and when the diameter of the positioning hole 101 is greater than or equal to 4mm, the coronary artery can be observed through the positioning hole 101, and injection can be completed by avoiding the visible blood vessel.
Referring to fig. 1b, the belt-shaped body 100 is provided at the rear surface thereof with a plurality of vacuum cups 102, and the vacuum cups 102 do not coincide with the positioning holes 101. Preferably, the plurality of vacuum cups 102 are uniformly distributed on the longitudinal or lateral center line of the rear surface of the band-shaped body 100. In this embodiment, the three vacuum cups 102 are uniformly distributed on the back longitudinal center line of the belt-shaped body 100. Thus, after the operator places the band-shaped body 100 on the outer surface of the heart, the vacuum cups 102 are lightly pressed so that a certain vacuum region is formed between the inner surface of the vacuum cups 102 and the outer surface of the heart to detachably fix the band-shaped body 100 on the outer surface of the heart. After the injection is completed, the vacuum state between the vacuum chuck 102 and the outer surface of the heart can be released, and the band-shaped body 100 can be quickly taken down from the outer surface of the heart and withdrawn from the patient. It is understood that in other embodiments, a plurality of vacuum cups 102 may be distributed at four corners or around the strip-shaped body 100, as long as the positions of the vacuum cups 102 are not coincident with the positions of the pilot holes 101, i.e. the injection process of the hydrogel is not affected.
Referring to fig. 2a and 2b, the vacuum chuck 102 is a single-layer or multi-layer flat chuck or a deep concave chuck. Preferably a single layer deep concave chuck. Because the inner space of the deep concave type sucking disc is larger, and the deep concave structure is more in accordance with the anatomical structure of the outer surface of the heart, the connecting force between the vacuum sucking disc and the outer surface of the heart can be effectively increased by using the deep concave type sucking disc.
The vacuum chuck 102 is made of rubber, silicone rubber, polyurethane, nitrile rubber, or vinyl-containing polymers. In this embodiment, the vacuum chuck 102 is made of polyurethane.
The ventricular wall injection aid of the present embodiment is used as follows:
the first step is as follows: after the heart is exposed by opening the chest, confirming that the middle level of the left ventricle is an injection part, attaching the belt-shaped main body 100 of the ventricular wall injection auxiliary instrument to the middle injection part of the left ventricle, slightly pressing the vacuum suction cups 102 on the back of the belt-shaped main body 100, and removing air in the vacuum suction cups 102, so that each vacuum suction cup 102 is attached to the outer surface of the heart, at the moment, the belt-shaped main body 100 is fixed on the outer surface of the heart, and the positioning hole 101 on the belt-shaped main body 100 is a hydrogel injection point;
the second step: slowly injecting hydrogel into each positioning hole 101 through an injector, wherein visual blood vessels need to be avoided during injection, and the hydrogel enters different areas of the ventricular wall;
the third step: after the injection is completed, the connection between the vacuum chuck 102 and the outer surface of the heart is released by slightly pulling the band-shaped body 100, and the band-shaped body 100 is withdrawn.
Compared with the prior art, the ventricular wall injection auxiliary device of the embodiment has at least the following beneficial effects:
(1) the positioning precision of ventricular wall injection is improved;
(2) the operation is simple and convenient, the belt-shaped main body of the ventricular wall injection auxiliary device is connected with the surface of the heart through the vacuum chuck, and the accurate positioning of an injection point can be prevented from being influenced by the heart pulsation or the action of an operator;
(3) after the injection is finished, the connection between the vacuum sucker and the outer surface of the heart can be quickly released, and the strip-shaped main body is withdrawn out of the body of the patient, so that the operation time is saved;
(4) avoid the pigment pollution used when marking the injection point.
Example two
Referring to fig. 3a and 3b, the structure of the ventricular wall injection assisting device of the second embodiment is substantially the same as that of the ventricular wall injection assisting device of the first embodiment, except that four vacuum cups 10 are distributed at four corners of the strip-shaped main body 100. Referring to fig. 4a and 4b, in the present embodiment, the vacuum chuck 102 is a pneumatic chuck, and the proximal opening of the pneumatic chuck is connected to a negative pressure device.
The ventricular wall injection aid of the present embodiment is used as follows:
the first step is as follows: after the heart is exposed by opening the chest, confirming that the middle level of the left ventricle is an injection part, attaching the belt-shaped main body 100 of the ventricular wall injection auxiliary instrument to the middle injection part of the left ventricle, starting a negative pressure device to suck out air in the pneumatic suction cup and then closing the air valve, tightly adsorbing the pneumatic suction cup on the surface of the heart under the action of negative pressure between the pneumatic suction cup and the outer surface of the heart, fixing the belt-shaped main body 100 on the outer surface of the heart, wherein a positioning hole 101 on the belt-shaped main body 100 is a hydrogel injection point;
the second step is that: avoiding visible blood vessels, slowly injecting hydrogel into each positioning hole 101, and enabling the hydrogel to enter different areas of the ventricular wall;
the third step: after the injection is completed, the air valve is released, air enters the space between the pneumatic suction cup and the outer surface of the heart, the connection between the pneumatic suction cup and the outer surface of the heart can be released, and the strip-shaped main body 100 is removed.
In the embodiment, the pneumatic sucker is used, so that the adsorption capacity between the pneumatic sucker and the outer surface of the heart can be enhanced, the relative movement between the belt-shaped main body and the surface of the heart is further avoided, and the accurate positioning of the injection point caused by the heart pulsation or the action of an operator is effectively avoided.
EXAMPLE III
Referring to fig. 5, the structure of the ventricular wall injection assisting apparatus of the third embodiment is substantially the same as that of the ventricular wall injection assisting apparatus of the first embodiment, except that two rows of positioning holes 101 are distributed in parallel on the belt-shaped body 100. The transverse distance between two rows of pilot holes 101 ranges from 12 mm to 20mm, and the longitudinal distance between two adjacent pilot holes 101 in each row ranges from 12 mm to 18 mm. In this embodiment, the transverse distance between two rows of positioning holes 101 is 16mm, and the longitudinal distance between two adjacent positioning holes 101 in each row is 15 mm. The number of the positioning holes 101 in each row is 6. In the two rows of positioning holes, 6 upper rows of positioning holes 101 and 6 lower rows of positioning holes 101 are respectively arranged in a one-to-one correspondence manner. The corresponding arrangement means that a connecting line between the upper row of positioning holes 101 and the lower row of positioning holes 101 corresponding to the upper row of positioning holes is perpendicular to the longitudinal center line of the belt-shaped body 100.
The procedure of using the ventricular wall injection assisting device of this embodiment is the same as that of the first embodiment, and will not be described herein again.
In this embodiment, the addition of multiple injection points provides better treatment for patients with greater left ventricular dilation.
Example four
Referring to fig. 6, the structure of the ventricular wall injection assisting apparatus of the fourth embodiment is substantially the same as that of the ventricular wall injection assisting apparatus of the third embodiment, except that in the ventricular wall injection assisting apparatus of the fourth embodiment, the number of the positioning holes 101 is 13, wherein the number of the positioning holes 101 in the upper row is 7, the number of the positioning holes 101 in the lower row is 6, and the 7 positioning holes 101 in the upper row are staggered with the 6 positioning holes 101 in the lower row. That is, the two rows of positioning holes 101 are staggered in a V-shape on the belt-shaped body 100. The staggered arrangement means that a connecting line between the upper row of positioning holes 101 and the lower row of positioning holes 101 forms a certain included angle with a straight line perpendicular to the longitudinal center line, and the included angle ranges from 25 degrees to 35 degrees. In this embodiment, an included angle α between a line connecting the upper row of positioning holes 101 and the lower row of positioning holes 101 and a straight line perpendicular to the longitudinal center line is 32 degrees.
The usage of the ventricular wall injection assisting device of this embodiment is the same as that of the first embodiment, and will not be described herein.
In this embodiment, the addition of multiple injection points provides better treatment for patients with greater left ventricular dilation. The positioning points which are arranged in a staggered mode are more in line with the anatomical structure of the heart, coronary vessels which are longitudinally distributed in the middle of the left ventricle can be avoided, transversely distributed vessels on the surface of the heart can be avoided, the safety is further improved, and the use is more flexible and convenient.
EXAMPLE five
Referring to fig. 7, the structure of the ventricular wall injection assisting apparatus of the fifth embodiment is substantially the same as that of the ventricular wall injection assisting apparatus of the fourth embodiment, except that a plurality of auxiliary holes 104 with smaller diameters are uniformly distributed around each positioning hole 101 in the ventricular wall injection assisting apparatus of the fifth embodiment. Each pilot hole 101 and its surrounding plurality of satellite holes 104 form a pilot zone 105. The diameter of the smallest enclosing circle of each positioning region 105 is greater than or equal to 4mm, and the smallest enclosing circles of the plurality of positioning regions 105 do not intersect with each other. The smallest circle surrounding the positioning region 105 is a circle having the smallest area among circles that surround the positioning hole 101 in a certain positioning region 105 and all the auxiliary holes 104 around the positioning hole 101.
Specifically, 6 satellite holes 104 are evenly distributed around each pilot hole 101. Each pilot hole 101 and the 6 satellite holes 104 distributed around it constitute a pilot area 105. The uniform distribution means that 6 auxiliary holes 104 are uniformly arranged at intervals around the center of the positioning hole 101 to form a circle. The diameter of the smallest enclosing circle (i.e., the circle in the dotted line portion in fig. 7) of the positioning region 105 is 7mm, the diameter of the positioning hole 101 in the positioning region 105 is 2mm, and the diameter of each attachment hole 104 is 1.6 mm. Thus, the operator can select the pilot hole 101 or any of the auxiliary holes 104 in the pilot region 105 to perform injection, avoiding the blood vessel.
The usage of the ventricular wall injection assisting device of this embodiment is the same as that of the first embodiment, and will not be described herein.
In the embodiment, an operator can select the positioning holes or any auxiliary holes in the positioning area for injection, so that not only can the visible blood vessels be effectively avoided, but also the injection points of the hydrogel can be distributed more uniformly, therefore, the injection efficiency is higher, and the treatment effect is better.
In conclusion, the invention adopts the strip-shaped main body with a plurality of positioning holes as the ventricular wall injection auxiliary instrument, can improve the positioning precision of ventricular wall injection and has simple and convenient operation. And the banded main body of the ventricular wall injection auxiliary instrument is connected with the surface of the heart through the vacuum chuck, so that the precise positioning of an injection point caused by the heart pulsation or the action of an operator can be avoided, and after the injection is finished, the connection between the vacuum chuck and the outer surface of the heart can be quickly released, the banded main body is withdrawn from the body of a patient, the operation time is saved, and the pollution caused by residual pigment in the body of the patient can be avoided.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A ventricular wall injection auxiliary device for implantable hydrogel surgery is characterized by comprising a flexible belt-shaped main body, a flexible belt-shaped main body and a flexible belt-shaped main body, wherein the flexible belt-shaped main body is rigid and can adapt to the structure of the outer surface of the heart and is attached to the heart; the belt-shaped main body is made of a biocompatible material, a plurality of positioning holes are distributed in the belt-shaped main body, a plurality of vacuum suckers are arranged on the back surface of the belt-shaped main body, the belt-shaped main body is connected with the surface of a heart through the vacuum suckers, hydrogel is injected into different areas of the wall of the heart chamber through the positioning holes respectively, and the positions of the vacuum suckers and the positioning holes are not overlapped.
2. The ventricular wall injection aid according to claim 1, wherein the plurality of vacuum cups are uniformly distributed on the longitudinal centerline of the back surface of the band-shaped body or the plurality of vacuum cups are distributed at four corners or around the band-shaped body.
3. The ventricular wall injection aid of claim 1, wherein the vacuum cup is a single-layer flat cup or a deep concave cup.
4. The ventricular wall injection aid of claim 1, wherein the vacuum chuck is made of rubber, silicone rubber, polyurethane, nitrile rubber, or vinyl-containing polymers.
5. The ventricular wall injection aid according to claim 1, wherein the band-shaped body has a length in the range of 50-80mm, a width in the range of 15-25mm, and a thickness in the range of 1-2 mm.
6. The ventricular wall injection assisting apparatus according to claim 1, wherein the positioning holes are through holes with a diameter of 4mm or more, and the number of the positioning holes is 4 to 16.
7. The ventricular wall injection aid according to claim 1, wherein the plurality of pilot holes are distributed in at least one row on the band-shaped body, and a longitudinal distance between two adjacent pilot holes ranges from 12 mm to 18 mm.
8. The ventricular wall injection aid according to claim 1, wherein the plurality of positioning holes are distributed in two parallel rows on the belt-shaped body, the transverse distance between two rows of positioning holes ranges from 12 mm to 20mm, and the longitudinal distance between two adjacent positioning holes in each row ranges from 12 mm to 18 mm.
9. The ventricular wall injection assisting apparatus according to claim 8, wherein, in the two rows of positioning holes, the upper row of positioning holes and the lower row of positioning holes are correspondingly arranged or staggered; the connecting line between the upper row of positioning holes and the lower row of positioning holes which are correspondingly arranged is vertical to the longitudinal center line of the belt-shaped main body, and the included angle range between the connecting line between the upper row of positioning holes and the lower row of positioning holes which are staggered and a straight line vertical to the longitudinal center line is 25-35 degrees.
10. The ventricular wall injection assisting apparatus according to claim 1, wherein a plurality of auxiliary holes with smaller diameters are uniformly distributed around each positioning hole, each positioning hole and a plurality of auxiliary holes around the positioning hole form a positioning area, the diameter of the smallest enclosing circle of each positioning area is greater than or equal to 4mm, and the smallest enclosing circles of the plurality of positioning areas do not intersect with each other.
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Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3952742A (en) * | 1974-06-12 | 1976-04-27 | Taylor Duane F | Needle-carried, transthoracic, cannula-type cardiac resuscitation instrument |
| US6547821B1 (en) * | 1998-07-16 | 2003-04-15 | Cardiothoracic Systems, Inc. | Surgical procedures and devices for increasing cardiac output of the heart |
| US6605061B2 (en) * | 1999-07-14 | 2003-08-12 | Tricardia, L.L.C. | Catheter for drug injection in cardiovascular system |
| US6355065B1 (en) * | 1999-09-01 | 2002-03-12 | Shlomo Gabbay | Implantable support apparatus and method of using same |
| US7740623B2 (en) * | 2001-01-13 | 2010-06-22 | Medtronic, Inc. | Devices and methods for interstitial injection of biologic agents into tissue |
| US20040138621A1 (en) * | 2003-01-14 | 2004-07-15 | Jahns Scott E. | Devices and methods for interstitial injection of biologic agents into tissue |
| US20070172472A1 (en) * | 2005-06-23 | 2007-07-26 | Asha Nayak | Methods and Systems for Treating Injured Cardiac Tissue |
| CN201469761U (en) * | 2009-07-19 | 2010-05-19 | 杨玲 | Novel positioning device for treatment of diabetes |
| US20110117195A1 (en) * | 2009-11-18 | 2011-05-19 | National Cheng Kung University | Method for improving myocardial infarction by intramyocardial or transendocardial injection of peptide nanofibers |
| EP2895236B1 (en) * | 2012-09-11 | 2018-08-15 | Native Cardiocascular LLC | Device for targeted tissue drug delivery |
| JP6771229B2 (en) * | 2015-08-25 | 2020-10-21 | 学校法人同志社 | Needle support fixture and needle device |
| CN206325116U (en) * | 2016-10-21 | 2017-07-14 | 北京启麟科技有限公司 | A kind of 3D printing guide plate for Minimally Invasive Surgery |
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