CN211434650U - Left ventricle auxiliary device system - Google Patents
Left ventricle auxiliary device system Download PDFInfo
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- CN211434650U CN211434650U CN201921351627.6U CN201921351627U CN211434650U CN 211434650 U CN211434650 U CN 211434650U CN 201921351627 U CN201921351627 U CN 201921351627U CN 211434650 U CN211434650 U CN 211434650U
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Abstract
The utility model provides a left ventricle auxiliary device system, which comprises a blood drawing cannula, a blood transfusion cannula and a blood pump; the blood drawing cannula comprises a first port and a second port, a first connecting part is fixed at the first port, and the first connecting part is communicated with the input end of the blood pump; the blood transfusion cannula comprises a third port and a fourth port, wherein a second connecting part is fixed on the third port, and the second connecting part is communicated with the output end of the blood pump. The utility model discloses an artery intubate is applied to treatment left heart failure: the blood pumping intubation is connected with the input end of an external blood pump through a first connecting part, the blood transfusion intubation is connected with the output end of the external blood pump through a second connecting part, the blood pump works to pump the blood deposited in the left ventricle out of the body through the blood pumping intubation, and the blood is re-infused to the arterial system of a patient through the blood transfusion intubation, so that the effect of assisting the left ventricle in pumping blood is achieved.
Description
Technical Field
The utility model belongs to the field of medical equipment, in particular to left ventricle auxiliary device system.
Background
The heart is one of the most important organs in the vertebrate body and has the primary function of providing power to the blood flow and carrying it to various parts of the body. The human heart is located on the lower left side of the middle part of the chest, the heart consists of cardiac muscles, and four cavities, namely a left atrium, a left ventricle, a right atrium and a right ventricle, wherein the inner wall of the left ventricle is the thickest, and the four cavities are the necessary paths for systemic circulation and pulmonary circulation respectively. The left atrium and the right atrium and the left ventricle are separated by intervals and are not communicated with each other, and valves (atrioventricular valves) are arranged between the atria and the ventricles, so that blood can only flow into the ventricles from the atria but can not flow backwards.
Heart failure (heart failure) refers to a heart circulatory disturbance syndrome caused by insufficient discharge of venous return blood volume from the heart due to the failure of the systolic function and/or diastolic function of the heart, resulting in venous system blood stasis and arterial system blood perfusion deficiency, wherein the disturbance syndrome is manifested as pulmonary congestion and vena cava congestion.
The blood extracted by the extracorporeal membrane lung oxygenation equipment is venous blood, so the blood can be sent to an arterial system of a patient after being oxygenated by the extracorporeal membrane lung.
Therefore, it is necessary to increase the effect of the blood circulation flow of the cardiac artery and to protect the blood circulation.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, the present invention relates to a left ventricle assisting device system,
the device comprises a cannula and a blood pump, wherein the cannula is connected with the blood pump;
the cannula comprises a single channel cannula and a double channel cannula;
the single-channel cannula comprises a blood drawing pipeline, a blood transfusion pipeline and a combined tee joint, wherein the combined tee joint is sleeved outside the circumference of the blood drawing pipeline, and one end of the blood transfusion pipeline is nested inside the combined tee joint;
the blood drawing pipeline is nested in the blood transfusion pipeline, the inner diameter of the blood transfusion pipeline is larger than the outer diameter of the blood drawing pipeline, and a cavity is arranged between the blood transfusion pipeline and the blood drawing pipeline;
the two-channel cannula comprises a blood drawing cannula and a blood transfusion cannula;
the blood drawing cannula comprises a first port and a second port, a first connecting part is fixed at the first port, and the first connecting part is communicated with the input end of the blood pump;
the blood transfusion cannula comprises a third port and a fourth port, wherein a second connecting part is fixed on the third port, and the second connecting part is communicated with the output end of the blood pump.
Preferably, combine two openings in the tee bend to set up on a straight line, form a both ends open-ended straight tube, the straight tube circumference outside is provided with the third opening, the third opening with the straight tube intercommunication, the third opening is used for external blood pump, a port and the third opening intercommunication that combines tee bend of blood transfusion pipeline.
Preferably, a plurality of first bleeding holes are formed in the side wall of the blood transfusion pipeline, a plurality of first blood inlet holes are formed in the side wall of one end of the blood drawing pipeline, and a soft tip is arranged at one end, close to the first blood inlet holes, of the blood drawing pipeline.
Preferably, the blood drawing pipeline is provided with a connecting part at one end far away from the soft tip end, the blood drawing pipeline is connected to the input end of the blood pump through the connecting part, and a third port on the combination tee is externally connected with the output end of the blood pump.
Preferably, a plurality of second blood inlet holes are formed in the side wall of one end of the second port of the blood drawing cannula, and a flexible sleeve is fixed on the second port.
Preferably, the soft sleeve comprises an outer ring sleeve and an inner ring sleeve, and the outer ring sleeve, the inner ring sleeve and the soft sleeve are arranged into a whole.
Preferably, the flexible sleeve is provided with a first opening and a second opening, the first opening is communicated with the second opening, and the second opening is correspondingly connected with the second port.
Preferably, draw blood intubate circumference outside and be provided with first annular, draw blood intubate circumference inner wall and be provided with the second annular, first annular with the second annular all sets up on the intubate of drawing blood that is close to the second port.
Preferably, the circumference inboard of outer loop cover one end is provided with first ring strip, the circumference outside of interior loop cover one end is provided with the second ring strip, first ring strip with first annular buckle is connected, the second ring strip with second annular buckle is connected.
Preferably, a side end face of the inner ring sleeve, which is far away from the second ring strip, and a side end face of the outer ring sleeve, which is far away from the first ring strip, are fixedly connected with a side end face of the flexible sleeve, the length of the inner ring sleeve is greater than that of the outer ring sleeve, and the first ring strip and the second ring strip are staggered with each other.
Preferably, the outer ring sleeve and the inner ring sleeve are fixedly connected with one end face of the soft sleeve, the outer side of the circumference of the outer ring sleeve coincides with the outer side of the circumference of the soft sleeve, the inner side of the circumference of the inner ring sleeve coincides with the inner side of the circumference of the soft sleeve, and a gap is formed between the outer ring sleeve and the inner ring sleeve.
Preferably, the inner diameter of the outer ring sleeve is larger than the outer diameter of the blood drawing cannula, the outer diameter of the inner ring sleeve is smaller than the inner diameter of the blood drawing cannula, and the gap is correspondingly matched with the wall of the blood drawing cannula.
Preferably, a plurality of second bleeding holes are arranged on the fourth port of the blood transfusion cannula, and the fourth port of the blood transfusion cannula is a curved surface.
The utility model has the advantages that: the utility model discloses an artery intubate is applied to treatment left ventricle failure: the single channel intubate and binary channels intubate all are connected with external blood pump, and the blood pump work is taken the blood of left ventricle siltation through the intubate extrasomatic, recycles the intubate and reinfects the arterial system of patient with blood again, plays the effect of supplementary left ventricle pump blood.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 shows a schematic structural view of a blood pump connection cannula of the present invention;
fig. 2 is a schematic view illustrating the overall structure of the single-channel arterial cannula according to the present invention;
fig. 3 is a schematic view showing the overall structure of the double-channel arterial cannula of the present invention inserted into an arterial vessel;
fig. 4 shows a schematic sectional structure diagram of the soft sleeve of the present invention;
fig. 5 shows a schematic cross-sectional structure of the blood transfusion cannula of the present invention;
in the figure: 1-blood pump, 2-single channel cannula, 21-blood drawing pipeline, 22-blood transfusion pipeline, 221-first blood outlet, 3-double channel cannula, 31-blood drawing cannula, 311-first connecting part, 312-second connecting part, 313-second blood inlet, 32-blood transfusion cannula, 321-second blood outlet, 4-combination tee, 5-first blood inlet, 6-soft tip, 7-connecting part, 8-soft sleeve, 81-outer ring sleeve, 811-first opening, 812-second opening and 82-inner ring sleeve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 shows a schematic structural diagram of a blood pump connection cannula of the present invention. As shown in fig. 1, a left ventricle auxiliary device system includes a cannula connected with a blood pump 1 and the blood pump 1; the cannula comprises a single channel cannula 2 and a double channel cannula 3.
The utility model discloses an artery intubate is applied to treatment left heart failure: the single channel intubate 2 and binary channels intubate 3 all are connected with external blood pump 1, and blood pump 1 work is taken the blood of left ventricle siltation extracorporeally through the intubate, recycles the intubate and reinfects patient's arterial system with blood again, plays the effect of supplementary left ventricle pump blood. The cannula directly enters the left ventricle for blood drawing, the drawn blood is arterial blood, and compared with ECMO (extracorporeal Membrane oxygenation), the blood can be directly sent to the arterial system of a patient without an oxygenation process, so that only the blood pump 1 is needed to provide power for extracorporeal circulation of the blood, and related equipment such as a heat preservation box and the like can be reduced.
Specifically, fig. 2 shows the overall structure of the single-channel arterial cannula according to the present invention. As shown in fig. 2, the single-channel cannula 2 comprises a blood withdrawal line 21, a blood transfusion line 22 and a junction tee 4. The combination tee joint 4 is sleeved on the outer side of the blood drawing pipeline 21, one end of the blood transfusion pipeline 22 is nested on the inner side of the combination tee joint 4, the blood drawing pipeline 21 is sleeved inside the blood transfusion pipeline 22, and the length of the blood drawing pipeline 21 is larger than that of the blood transfusion pipeline 22. Illustratively, a single-channel arterial cannula is inserted into the artery, i.e., a portion of the arterial cannula where the blood line 21 and the blood line 22 overlap is inserted into the artery, wherein the end of the blood line 21 inserted into the arterial blood vessel crosses the aortic valve into the left ventricle, the blood line 21 is used for extracting arterial blood inside the left ventricle, and the blood line 22 is used for discharging the extracted arterial blood. The same artery channel is all walked to blood drawing pipeline 21 and blood transfusion pipeline 22, and then can set up a wound on the patient physically, inserts artery intubate inside the artery through the wound, avoids the secondary intubate, reduces the probability of infection and complication.
Two openings set up on a straight line in combining tee bend 4, form a both ends open-ended straight tube, and the third opening sets up in the circumference outside of straight tube, and the third opening communicates with the straight tube. The straight tube cup joints outside the circumference of blood drawing pipeline 21, and inside a port of straight tube was gone into to transfusion tube way 22 one end card, combine the third port and the transfusion tube way 22 intercommunication on the tee bend 4. The blood line 22 is only wrapped around the circumference of the blood withdrawal line 21, and the blood line 22 does not communicate with the blood withdrawal line 21.
The blood drawing line 21 and the blood transfusion line 22 may be set as coaxial dual-chamber lines, wherein one port of the blood transfusion line 22 is connected to the straight tube of the combining tee 4, and one port of the blood transfusion line 22 is communicated with the third through port of the combining tee 4 through the straight tube. The other end of the blood line 22 is sleeved on the blood drawing line 21. The blood withdrawal line 21 and the blood transfusion line 22 both require special treatment, such as surface smoothing, to prevent damage to the vessel wall during retrograde passage of the catheter into the aorta.
Illustratively, the straight tube of the junction tee 4 is merely illustrated as an example, and does not limit the specific shape of the junction tee 4. Combine tee bend 4 to cup joint on blood drawing pipeline 21 and blood transfusion line 22, the inseparable circumference outside at blood drawing pipeline 21 that cup joints of an opening of straight tube, and an opening of straight tube and the junction of blood drawing pipeline 21 are closely seamless, the inseparable circumference outside at blood transfusion line 22 that cup joints of the second opening of straight tube, and the second opening of straight tube and blood transfusion line 22's junction is closely seamless to avoid blood to draw the junction of blood pipeline 21 and straight tube and the junction of straight tube and blood transfusion line 22 to flow. The blood drawing line 21 and the blood transfusion line 22 are not necessarily formed in a straight line shape, and the blood drawing line 21 and the blood transfusion line 22 can be bent without affecting the combination of the combination tee 4, the blood drawing line 21 and the blood transfusion line 22. Wherein, the blood drawing line 21 and the blood transfusion line 22 are made of blood compatible materials, which can not make blood solidify on the tube walls of the blood drawing line 21 and the blood transfusion line 22. The blood-compatible material is merely exemplified and not limited to the blood-compatible material, and for example, TPU (polyurethane for medical use) can also ensure blood compatibility.
The inner diameter of the blood transfusion line 22 is larger than the outer diameter of the blood drawing line 21, so that the blood transfusion line 22 and the blood drawing line 21 form a certain cavity, and blood can flow in the blood transfusion line 22 conveniently. In this case, it is necessary to provide a sufficient flow space for arterial blood, and when blood flows through the blood drawing line 21 and the blood transfusion line 22, the substance in the blood is prevented from blocking the arterial cannula, so that the blood transfusion line 22 can be safely implanted into the arterial blood tube in a state where blood is normally transported. When the blood transfusion line 22 is implanted into the arterial blood vessel, if the outer wall of the blood transfusion line 22 is in close contact with the inner wall of the arterial blood vessel, the blood in the blood transfusion line 22 cannot be discharged through the first bleeding hole 221, and when the blood is discharged through the blood transfusion line 22, the blood can move only in the direction in which the blood transfusion line 22 is discharged, and the blood circulation to the whole body limbs is blocked.
As shown in fig. 2, a third port of the combining tee 4 is externally connected with a blood pump 1, and the pumped blood is conveyed into the combining tee 4 by the blood pump 1. Since the third port is communicated with the blood transfusion line 22, the blood enters the blood transfusion line 22 through the combining tee 4, and then the blood flows into the artery through the blood transfusion line 22, and the blood transmission effect is completed.
The side wall of the blood transfusion line 22 is provided with a plurality of first bleeding holes 221. Illustratively, the pore size of the first bleeding hole 221 may be defined. That is, when the blood pump 1 delivers blood at a certain flow rate, the aperture of the first bleeding hole 221 is too small, and the flow rate of the blood sprayed through the first bleeding hole 221 is increased, thereby causing vascular injury; if the diameter of the first bleeding hole 221 is too large, the first bleeding hole 221 at other positions farther from the junction tee 4 cannot discharge proper blood, thereby affecting the normal transportation of blood.
The side wall of one end of the blood drawing pipeline 21 is provided with a first blood inlet hole 5. One end of the blood drawing pipeline 21 close to the first blood inlet hole 5 is provided with a soft tip 6, one end of the blood drawing pipeline 21 far away from the soft tip 6 is provided with a connecting part 7, and the connecting part 7 and the soft tip 6 are respectively arranged at the end parts of two sides of the blood drawing pipeline 21. The blood drawing pipeline 21 is communicated with the input end of the blood pump 1 through the connecting part 7, the third port on the combined tee joint 4 is externally connected with the output end of the blood pump 1, so that the blood pump 1 can draw the arterial blood inside the left ventricle through the first blood inlet hole 5 and the soft tip 6 on the blood drawing pipeline 21, then the blood pump 1 inputs the drawn arterial blood into the blood transfusion pipeline 22 through the third port on the combined tee joint 4, and then the arterial blood is discharged into the artery through the first blood outlet hole 221 on the blood transfusion pipeline 22 and the opening of the blood transfusion pipeline 22.
Illustratively, the third port of the combination tee 4 is externally connected with the output end of the blood pump 1, the blood drawing pipeline 21 is connected with the input end of the blood pump 1 through the connecting part 7, and when an arterial cannula enters the inside of an artery of a human body, a blood circulation loop is formed. The blood pump 1 may be provided as a circulation pump, which serves only as a blood pump 1, and is not limited to a blood pump, which is a blood conveying device. Thereby when the heart failure patient carries out blood circulation treatment through left ventricle auxiliary device system, the soft most advanced 6 of bloodletting line 21 inserts inside the left ventricle through the artery blood vessel, and then blood pump 1 operates the inside arterial blood of left ventricle of soft most advanced 6 and the first hole of intaking 5 through bloodletting line 21. After passing through the blood pump 1, the blood is fed into the interior of the blood transfusion line 22 through the third port of the three-way junction 4, and the arterial blood is discharged into the artery through the first blood outlet 221 on the side wall of the blood transfusion line 22 and the opening of the blood transfusion line 22. The artery intubate only is as the instrument of extraction blood, and blood pump 1 is as the transportation power of blood, and left ventricle auxiliary device system forms through the combination of artery intubate and blood pump 1, reaches the circulation effect of the inside artery blood of left ventricle through left ventricle auxiliary device system, carries whole body all around with artery blood through the branch road on the artery, accomplishes the transportation to blood.
The soft tip 6 is connected with the blood drawing pipeline 21, and the material of the soft tip 6 can be polyvinyl chloride. The polyvinyl chloride itself can store blood without damaging the blood, and the polyvinyl chloride is only an exemplary illustration of the material of the soft tip 6 and is not limited to polyvinyl chloride, such as TPU. The soft tip 6 comprises a top opening and a bottom opening, and the bottom opening of the soft tip 6 is communicated with the blood drawing pipeline 21. The cornice of the top mouth of the soft tip 6 is smoothed to reduce the damage of the soft tip 6 to the arterial blood vessel.
The soft tip 6 can also be arranged in a pigtail shape, and when the soft tip 6 on the blood drawing pipeline 21 is positioned in the left ventricle, the pigtail-shaped soft tip 6 can reduce the damage to the tissue in the left ventricle. The pigtail shape of the soft tip 6 is illustrative of the soft tip 6, and the soft tip 6 is not limited to the shape.
The working process of the single-channel arterial cannula comprises the following steps:
1. inserting a cannula into the body: a wound is formed on an arterial blood vessel of a patient, a blood drawing pipeline 21 with a soft tip 6 is inserted into the blood vessel, then a blood transfusion pipeline 22 sleeved on the blood drawing pipeline 21 also enters the blood vessel, and when the blood drawing pipeline 21 with the soft tip 6 enters a left ventricle, a combined tee joint 4 is positioned outside a human body, the blood drawing pipeline 21 and the blood transfusion pipeline 22 both have a channel, so that secondary intubation is avoided, and the probability of infection and complications is reduced;
2. blood circulation: the blood pump 1 starts to work, the arterial blood inside the left ventricle is extracted through the first blood inlet 5 and the soft tip 6 on the blood extraction line 21, then after extracorporeal circulation, the blood pump 1 inputs the extracted arterial blood to the blood transfusion line 22 through the third port on the junction tee 4, then the arterial blood is discharged into the artery through the first blood outlet 221 and the opening, and then the blood is transported to the limbs of the body through the various branches on the artery.
Specifically, fig. 3 shows the overall structure schematic diagram of the dual-channel arterial cannula of the present invention inserted into the arterial vessel. As shown in fig. 3, the dual channel cannula 3 includes a blood withdrawal cannula 31 and a blood transfusion cannula 32. The blood drawing cannula 31 comprises a first port and a second port, the first port is fixed with a first connecting part 311, and then the blood drawing cannula 31 is communicated with the input end of the blood pump 1 through the first connecting part 311. The transfusion cannula 32 comprises a third port and a fourth port, the third port is fixed with a second connecting part 312, and the transfusion cannula 32 is communicated with the output end of the blood pump 1 through the second connecting part 312. The blood withdrawal cannula 31 and the blood transfusion cannula 32 are made of blood compatible materials that do not allow blood to clot on the walls of the blood withdrawal cannula 31 and the blood transfusion cannula 32. The blood-compatible material is merely exemplified and not limited to the blood-compatible material, and for example, TPU (polyurethane for medical use) can also ensure blood compatibility.
Illustratively, the entire working cannula is assembled, since the blood pump 1 is arranged outside the body, it is necessary to connect both the blood withdrawal cannula 31 and the blood transfusion cannula 32 to the blood pump 1. The first connection 311 at the first port of the blood drawing cannula 31 is connected to the input of the blood pump 1, and the second connection 312 at the third port of the blood transfusion cannula 32 is connected to the output of the blood pump 1, so that both the blood drawing cannula 31 and the blood transfusion cannula 32 can be mounted to the blood pump 1, thereby completing a complete cycle. The first connecting portion 311 with airtight seamless between the blood pump 1 input, the second connecting portion 312 with airtight seamless between the blood pump 1 output to avoid the inside blood of left ventricle to spill through the input and the output of blood pump 1, increase the blood leakproofness simultaneously, also can avoid external environment to pollute blood. When blood flows inside the blood drawing cannula 31 and the blood transfusion cannula 32, it is necessary to have a sufficient flow space for arterial blood. When blood flows in the blood drawing cannula 31 and the blood transfusion cannula 32, the situation that substances in the blood block the arterial cannula is avoided, and the inner diameters of the blood drawing cannula 31 and the blood transfusion cannula 32 need to be expanded while the normal flow of the blood in the blood drawing cannula 31 and the blood transfusion cannula 32 is ensured. Wherein, 2.0-4.0L/min is the normal circulation of the body blood operation of normal people, thus the blood pump 1 does not let the blood that the blood pump 1 outputs harm the material in the blood too fast when needing to guarantee the circulation effect of blood transportation yet.
Fig. 4 shows a schematic sectional structure diagram of the soft sleeve of the present invention. As shown in fig. 4, a plurality of second blood inlet holes 313 are formed in a side wall of one end of the second port of the blood drawing cannula 31, the flexible sleeve 8 is fixed to the second port, and the second blood inlet holes 313 are formed in the blood drawing cannula 31 close to the flexible sleeve 8. The soft cover 8 comprises an outer ring sleeve 81 and an inner ring sleeve 82, the outer ring sleeve 81 and the inner ring sleeve 82 are both connected to one side end face of the soft cover 8, the outer side of the circumference of the outer ring sleeve 81 coincides with the outer side of the circumference of the soft cover 8, the inner side of the circumference of the inner ring sleeve 82 coincides with the inner side of the circumference of the soft cover 8, and therefore a gap is formed between the outer ring sleeve 81 and the inner ring sleeve 82. The outer ring sleeve 81 and the inner ring sleeve 82 are integrated with the soft sleeve 8, and the length of the inner ring sleeve 82 is larger than that of the outer ring sleeve 81.
The space is connected with the second port buckle of the intubate 31 of drawing blood, the intubate 31 circumference outside of drawing blood is provided with first annular, 31 circumference inner wall of the intubate of drawing blood is provided with the second annular, first annular and second annular all set up on the intubate 31 of drawing blood that is close to the second port. The inner side of the circumference of one end of the outer ring sleeve 81 is provided with a first ring strip, and the outer side of the circumference of one end of the inner ring sleeve 82 is provided with a second ring strip. Because the length of interior snare 82 and outer loop cover 81 is different, and keep away from on interior snare 82 a side end face of second ring strip and a side end face that first ring strip was kept away from to outer loop cover 81 all with a side end face fixed connection of soft cover 8, and then first ring strip staggers each other with the second ring strip, and then outer loop cover 81 is connected with first annular buckle through first ring strip, and interior snare 82 is connected with second annular buckle through the second ring strip. The first ring strip and the outer ring sleeve 81 are arranged into a whole, and the second ring strip and the inner ring sleeve 82 are arranged into a whole.
The inner diameter of the outer ring sleeve 81 is larger than the outer diameter of the blood drawing cannula 31, and the outer diameter of the inner ring sleeve 82 is smaller than the inner diameter of the blood drawing cannula 31, so that the flexible sleeve 8 can be completely sleeved on the second port of the blood drawing cannula 31. The cornice of the second port on the blood drawing cannula 31 is buckled in the gap between the outer ring sleeve 81 and the inner ring sleeve 82, the outer wall of the inner ring sleeve 82 is attached to the inner circumferential wall of the blood drawing cannula 31, and the inner ring sleeve 82 corresponds to the second ring groove of the blood drawing cannula 31 through the second ring strip. The inner wall of the outer ring 81 is attached to the circumferential outer wall of the blood drawing cannula 31, and the outer ring 81 is attached to the first ring groove of the blood drawing cannula 31 by a first ring strip. The outer wall of the blood drawing cannula 31 needs to be smoothened, so that the damage to the artery vessel is reduced when the blood drawing cannula 31 is inserted, the soft sleeve 8 can be arranged in a pigtail shape, and when the blood drawing cannula 31 enters the artery vessel through the soft sleeve 8, the soft sleeve 8 reduces the damage of the blood drawing cannula 31 to the inner wall of the artery vessel.
Illustratively, the flexible sheath 8 is fitted over the second port of the blood withdrawal cannula 31 by an outer annular sheath 81 and an inner annular sheath 82. The pipe wall of the blood drawing cannula 31 is clamped between the outer ring sleeve 81 and the inner ring sleeve 82, the outer ring sleeve 81 and the inner ring sleeve 82 increase the stability of the soft sleeve 8 and the blood drawing cannula 31 through the ring strips, so that the soft sleeve 8 can be fastened to the second port of the blood drawing cannula 31, the second port of the soft sleeve 8 and the blood drawing cannula 31 is sealed and seamless, and the soft sleeve 8 is prevented from being separated from the blood drawing cannula 31.
The second port with the soft sleeve 8 on the blood drawing cannula 31 is inserted into the artery, and then the second port of the blood drawing cannula 31 is inserted into the left ventricle, and the second port with the soft sleeve 8 can be inserted into the left ventricle, and then the blood pump 1 can extract arterial blood of the left ventricle through the second blood inlet hole 313 on the blood drawing cannula 31 and the first opening 811 of the soft sleeve 8. The blood pump 1 is arranged outside the body, and the oxygenated arterial blood in the left ventricle is conveyed to the arterial blood vessel in an extracorporeal circulation mode without being oxygenated and then conveyed to the arterial blood vessel, so that the cost of blood circulation is reduced. And toxic substances in the air can be prevented from contacting the blood in the blood circulation process, so that the circulating blood is protected.
Illustratively, the first opening 811 of the soft sleeve 8 is communicated with the blood drawing cannula 31, the inner diameter of the first opening 811 is smooth with the inner diameter of the second opening 812, and the cornice of the first opening 811 and the cornice of the second opening 812 are smooth, so that the blood drawing cannula 31 can be inserted into the left ventricle through the soft sleeve 8. The lubricious sleeve 8 increases the ease with which the blood withdrawal cannula 31 can be introduced into the artery. The flexible sheath 8 may be made of a soft material to reduce the trauma of the flexible sheath 8 to the arterial vessel and the internal tissue of the left ventricle when the blood withdrawal cannula 31 with the flexible sheath 8 is inserted into the arterial vessel. The soft material is merely exemplified as an example, and is not limited to one, such as silicone, polyvinyl chloride, and the like.
Fig. 5 shows a schematic sectional structure of the blood transfusion cannula of the present invention. As shown in fig. 5, a plurality of second bleeding holes 321 are provided on the fourth port of the blood transfusion cannula 32, and the fourth port of the blood transfusion cannula 32 is provided with a curved surface which is smoothed. When the fourth port of the blood drawing cannula 2 is inserted into an arterial blood vessel, the smooth curved surface can reduce the damage of the blood drawing cannula 2 to the inner wall of the arterial blood vessel. Illustratively, the aperture of the second bleeding hole 321 may be defined. That is, when the blood pump 1 delivers blood at a certain flow rate, the aperture of the second bleeding hole 321 is too small, and the flow rate of the blood sprayed through the second bleeding hole 321 is increased, thereby causing blood vessel damage; if the diameter of the second bleeding holes 321 is too large, the arterial blood cannot be uniformly discharged into the artery through all the second bleeding holes 321. Under the circulation's of normal people's blood circulation of blood pump 1 transportation, adjust the aperture of the hole 321 that bleeds to the second, when making things convenient for the normal transportation of blood, also increase the diffusion effect of blood in the inside arterial blood pipe, and then blood passes through the branch road on the arterial blood vessel and carries on the health four limbs, accomplishes the transport work of blood.
The working process of the double-channel arterial cannula comprises the following steps:
1. inserting a cannula into the body: a wound is made in the arterial vessel of the patient and a blood withdrawal cannula 31 with a flexible sheath 8 is inserted into the vessel until a second port with a second access hole 313 is inserted into the left ventricle. Another wound is made on the arterial blood vessel, and then the fourth port of the transfusion cannula 32 is inserted into the arterial blood vessel through the other wound until the fourth port with the second bleeding hole 321 completely enters the other wound;
2. blood circulation: blood pump 1 directly extracts the blood of left ventricle through the intubate of drawing blood 31, takes out the blood that silts up in the left ventricle, utilizes blood transfusion intubate 32 to return the patient arterial system after the extrinsic cycle again, and the left ventricle body circulation pump blood is assisted through blood pump 1, compares in ECMO, has promoted cardiopulmonary system blood circulation.
Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (13)
1. A left ventricular assist device system,
comprises a cannula and a blood pump (1), wherein the cannula is connected with the blood pump (1);
the cannula comprises a single-channel cannula (2) and a double-channel cannula (3);
the single-channel cannula (2) comprises a blood drawing pipeline (21), a blood transfusion pipeline (22) and a combination tee joint (4), the combination tee joint (4) is sleeved outside the circumference of the blood drawing pipeline (21), and one end of the blood transfusion pipeline (22) is nested inside the combination tee joint (4);
the blood drawing pipeline (21) is nested in the blood transfusion pipeline (22), the inner diameter of the blood transfusion pipeline (22) is larger than the outer diameter of the blood drawing pipeline (21), and a cavity is arranged between the blood transfusion pipeline (22) and the blood drawing pipeline (21);
the two-channel cannula (3) comprises a blood drawing cannula (31) and a blood transfusion cannula (32);
the blood drawing cannula (31) comprises a first port and a second port, a first connecting part (311) is fixed at the first port, and the first connecting part (311) is communicated with the input end of the blood pump (1);
the blood transfusion cannula (32) comprises a third port and a fourth port, the third port is fixed with a second connecting part (312), and the second connecting part (312) is communicated with the output end of the blood pump (1).
2. A lv auxiliary device system according to claim 1, wherein two ports of the combining tee (4) are arranged in a straight line to form a straight tube with two open ends, and a third port is arranged at the outer side of the circumference of the straight tube and is communicated with the straight tube, the third port is used for externally connecting the blood pump (1), and a port of the blood transfusion pipeline (22) is communicated with the third port of the combining tee (4).
3. A left ventricular assist device system according to claim 2, wherein the blood transfusion line (22) is provided with a plurality of first bleeding holes (221) in the side wall, the blood drawing line (21) is provided with a plurality of first blood inlet holes (5) in the side wall at one end, and the blood drawing line (21) is provided with a soft tip (6) at the end close to the first blood inlet holes (5).
4. A left ventricular assist device system according to claim 3, wherein a connection portion (7) is provided at an end of the blood drawing line (21) away from the soft tip (6), the blood drawing line (21) is connected to an input end of the blood pump (1) through the connection portion (7), and a third port of the combining tee (4) is externally connected to an output end of the blood pump (1).
5. A left ventricular assist device system according to claim 1, wherein the second port of the blood drawing cannula (31) is provided with a plurality of second blood inlet holes (313) on one end side wall, and a flexible sleeve (8) is fixed on the second port.
6. A left ventricular assist device system according to claim 5, wherein the flexible sleeve (8) comprises an outer annular sleeve (81) and an inner annular sleeve (82), the outer annular sleeve (81), the inner annular sleeve (82) and the flexible sleeve (8) being provided as one piece.
7. A left ventricular assist device system according to claim 5, wherein the flexible sleeve (8) is provided with a first opening (811) and a second opening (812), the first opening (811) communicating with the second opening (812), the second opening (812) being connected correspondingly with the second port.
8. A left ventricular assist device system according to claim 6, wherein the blood drawing cannula (31) is provided with a first annular groove on the outer circumferential side, the blood drawing cannula (31) is provided with a second annular groove on the inner circumferential wall, and the first annular groove and the second annular groove are both provided on the blood drawing cannula (31) near the second port.
9. A lv assist device system according to claim 8, wherein a first ring strip is disposed on the inner circumference of one end of the outer ring sleeve (81), a second ring strip is disposed on the outer circumference of one end of the inner ring sleeve (82), the first ring strip and the second ring strip are snap-fitted, the first ring strip and the first ring groove are snap-fitted, and the second ring strip and the second ring groove are snap-fitted.
10. A lv assist device according to claim 9, wherein a side of the inner loop (82) distal from the second loop and a side of the outer loop (81) distal from the first loop are fixedly connected to a side of the flexible sheath (8), the inner loop (82) is longer than the outer loop (81), and the first and second loops are offset from each other.
11. A lv assist device according to claim 10, wherein the outer annular sleeve (81) and the inner annular sleeve (82) are fixedly connected to one end surface of the flexible sleeve (8), the outer circumferential side of the outer annular sleeve (81) coincides with the outer circumferential side of the flexible sleeve (8), the inner circumferential side of the inner annular sleeve (82) coincides with the inner circumferential side of the flexible sleeve (8), and a gap is formed between the outer annular sleeve (81) and the inner annular sleeve (82).
12. A left ventricular assist device system according to claim 11, wherein the inner diameter of the outer annular sleeve (81) is larger than the outer diameter of the blood withdrawal cannula (31), the outer diameter of the inner annular sleeve (82) is smaller than the inner diameter of the blood withdrawal cannula (31), and the clearance corresponds to match the wall of the blood withdrawal cannula (31).
13. A left ventricular assist device system according to claim 1, wherein a plurality of second bleeding holes (321) are provided on the fourth port of the transfusion cannula (32), and the fourth port of the transfusion cannula (32) is provided with a curved surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921351627.6U CN211434650U (en) | 2019-08-20 | 2019-08-20 | Left ventricle auxiliary device system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921351627.6U CN211434650U (en) | 2019-08-20 | 2019-08-20 | Left ventricle auxiliary device system |
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| CN211434650U true CN211434650U (en) | 2020-09-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110559541A (en) * | 2019-08-20 | 2019-12-13 | 安徽通灵仿生科技有限公司 | Single-channel arterial cannula for left heart assistance |
| CN110559540A (en) * | 2019-08-20 | 2019-12-13 | 安徽通灵仿生科技有限公司 | Left ventricle auxiliary device system |
-
2019
- 2019-08-20 CN CN201921351627.6U patent/CN211434650U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110559541A (en) * | 2019-08-20 | 2019-12-13 | 安徽通灵仿生科技有限公司 | Single-channel arterial cannula for left heart assistance |
| CN110559540A (en) * | 2019-08-20 | 2019-12-13 | 安徽通灵仿生科技有限公司 | Left ventricle auxiliary device system |
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