CN104382628B - Invitro abdominal aorta distal end blocking device - Google Patents

Abstract

The invention discloses an external abdominal aorta distal blocking device for improving the success rate of cardiopulmonary resuscitation after cardiac arrest. The device for blocking the distal abdominal aorta in vitro of the present invention comprises: a horizontal base plate, which is set under the lower back of a human body in a supine position when in use; on the fixed point on the side; the movable pillar, the bottom of which is equipped with an abdominal pressure head, which is used to contact and compress the abdomen of the human body in the supine position; the arc-shaped pressure arm, one end of which is adjustable and connected to the fixed pillar through the first joint , and the other end is adjustably connected with the movable support through the second joint. The in vitro distal abdominal aorta blocking device of the present invention can quickly and effectively block the blood flow of the distal abdominal aorta from outside the body during cardiopulmonary resuscitation, effectively increase the coronary artery perfusion pressure, and improve heart and brain function. , kidney and other important organs to continue blood perfusion, in order to improve the success rate of rescue and resuscitation of patients with cardiac arrest.

Description

In vitro distal abdominal aortic occlusion device

technical field

The invention belongs to the field of cardiopulmonary resuscitation, and relates to an external abdominal aorta distal blocking device for improving the success rate of cardiopulmonary resuscitation after cardiac arrest.

Background technique

When a sudden cardiac arrest (CA) occurs, due to time constraints, it is often too late to perform complex internal resuscitation measures. Therefore, cardiopulmonary resuscitation (CPR) has become the standard measure for rescuing cardiac arrest during first aid, and is widely used clinically. However, the low success rate of cardiopulmonary resuscitation has always posed severe challenges to emergency medicine and cardiopulmonary resuscitation workers. Early, timely and effective CPR is the basic rescue measure for CA. Coronary perfusion pressure (CPP) is the most important hemodynamic index to evaluate the effect of CPR. In order to improve CPP, the measures currently used to assist CPR include: (1) using chest compression equipment; (2) injecting epinephrine; (3) abdominal compression with bare hands, and so on. However, these measures may not be effective in improving hemodynamics, or have large side effects, and cannot effectively recover CPP, resulting in continuous hypoperfusion of important organs such as the heart and brain during cardiopulmonary resuscitation. How to improve the success rate of CPP and CPR under a more reasonable hemodynamic mechanism by intervening new technologies and methods during CPR is a technical problem that needs to be solved urgently.

Contents of the invention

In order to overcome the shortcomings of the current treatment measures in improving the CPP of patients with cardiac arrest, the purpose of the present invention is to provide an external abdominal aorta distal blocking device.

The in vitro distal abdominal aorta occlusion device of the present invention comprises: a horizontal base plate, which is set under the lower back of a human body in a supine position when in use; a fixed pillar, which is vertically fixed on the On the fixed point on one side of the base plate; the movable pillar is equipped with an abdominal pressure head at the bottom, which is used to contact and compress the abdomen of the human body in the supine position; the arc-shaped pressure arm, one end of which can be adjusted to connect with the body through the first joint The fixed strut is connected, and the other end is adjustably connected with the movable strut through a second joint.

According to a further feature of the in vitro distal abdominal aorta occlusion device of the present invention, the shape of the base plate is selected from the group consisting of: rectangle, square, rhombus, polygon, circle, and ellipse.

According to a further feature of the in vitro distal abdominal aorta occlusion device of the present invention, the first joint is equipped with a first joint knob, so that when the first joint knob is loosened, the arc-shaped pressure arm Open upward with the first joint as the axis, so that the base plate can be inserted under the lower back of the human body in a supine position, and align the movable pillar and the abdominal pressure head with the body surface landmarks.

According to a further feature of the in vitro distal abdominal aorta occlusion device of the present invention, the second joint is equipped with a second joint knob, so that when the abdominal indenter presses the abdomen downward, through the first The deviation of the position of the abdominal indenter is adjusted by the tightness of the knobs of the two joints, and the abdominal indenter is fine-tuned left and right with the second joint as the axis, so as to ensure the accuracy of external pressure on the abdominal aorta.

According to a further feature of the in vitro distal abdominal aorta occlusion device of the present invention, the range of motion of the first joint is 0° to 180°.

According to a further feature of the in vitro distal abdominal aorta occlusion device of the present invention, the range of motion of the second joint is 0° to 180°.

The in vitro distal abdominal aorta blocking device of the present invention can quickly, timely, conveniently and effectively block blood flow at the distal abdominal aorta from outside the body during cardiopulmonary resuscitation (CPR), increasing the Increase the afterload of the left ventricle, thereby effectively increasing the coronary perfusion pressure (CPP), to improve the continuous blood perfusion of the heart, brain, kidney and other important organs, so as to improve the success rate of rescue and resuscitation of patients with cardiac arrest.

Description of drawings

Fig. 1 is a schematic structural view of the in vitro distal abdominal aorta occlusion device according to the present invention.

Reference signs:

1: base plate; 2 is the fixed point of the pillar on the base plate; 3: fixed pillar: 4: the first joint; 5: the knob of the first joint; 6: arc pressure arm; 7: the knob of the second joint; 8: the second joint Two joints; 9: movable pillar; 10: abdominal pressure head.

detailed description

Example 1: Preparation of the in vitro distal abdominal aorta occlusion device according to the present invention

The in vitro distal abdominal aorta blocking device of the present invention, as shown in Figure 1, comprises: a horizontal base plate 1, which is set under the lower back of a human body in a supine position when in use; The pillar 3 is vertically fixed on the fixed point 2 on one side of the base plate 1; the movable pillar 9 is equipped with an abdominal pressure head 10 at its bottom, which is used to contact and compress the abdomen of the human body in a supine position; the arc pressure arm 6, one end of which is adjustably connected to the fixed strut 3 through the first joint 4, and the other end is adjustably connected to the movable strut 9 through the second joint 7.

The working principle of the in vitro distal abdominal aorta occlusion device of the present invention is: when the patient lies supine on the operating table or hospital bed to perform cardiopulmonary resuscitation (CPR), the first joint 4 on the fixed pillar 3 is opened to Place the horizontal base plate 1 under the lower back of the patient in a direction perpendicular to the long axis of the patient with the navel as the landmark. Then, the indenter 10 is placed on the abdomen of the human body in the supine position through the movable pillar 9, and then the first joint 4 on the fixed pillar 3 and the second joint 8 on the movable pillar 9 are adjusted, and the arc pressure is adjusted. The radian and length of the arm can adjust the position of the indenter 10 on the abdomen on the body surface of the human body accordingly for the size, position and action direction of the abdominal aorta pressure, so that the abdominal indenter is on the body surface corresponding to the abdominal aorta in vitro The best skin contact is achieved to achieve the purpose of temporary occlusion of the distal abdominal aorta in vitro. Therefore, it can effectively temporarily block the blood flow of the distal abdominal aorta in vitro, increase the resistance of the distal aorta, increase the afterload of the left ventricle, and effectively increase the coronary perfusion pressure (CPP) to improve the heart, brain, Sustained blood perfusion to important organs such as the kidneys improves the success rate of rescue and resuscitation of patients with sudden cardiac arrest.

During specific manufacture, the shape of the base plate can be made into the following shapes as required: rectangle, square, rhombus, polygon, circle, ellipse, etc.

In order to facilitate manipulation and adjustment of the abdominal aortic distal blocking device in vitro of the present invention, as shown in FIG. Two joint knobs7.

Implementation method: When the human body is in a supine position (for example, when lying on the ground or a bed), insert the base plate (1) into the lower back of the human body lying on the ground (bed) in a direction perpendicular to the long axis of the body Between the ground (or bed surface). Loosen the first joint knob 5, align the abdominal pressure head 10 with the body surface mark (for example, take the human navel as the body surface mark), press down the pressure arm 6, and press the abdominal pressure head 10 toward the lumbar spine, such as abdominal pressure If there is a slight deviation in the position where the head touches the navel, adjust the direction and position of the second joint 8 to keep the movable pillar (9) perpendicular to the coronal plane of the human body, so as to ensure that the distal end of the abdominal aorta is pressed against the lumbar vertebral body to achieve external resistance. The purpose of cutting off blood flow in the distal abdominal aorta.

Due to individual differences in human obesity or emaciation, when using the abdominal aorta distal blocking device described in the present invention for obese people, the two joints can be opened simultaneously, so that the gap between the base plate and the movable pillar and the abdominal pressure head The "opening" of the device is large enough to allow the device to be placed in place quickly and accurately when in use.

Example 2: Application test experiment of the in vitro distal abdominal aorta occlusion device according to the present invention

Experimental materials: 6 healthy adult mixed-breed dogs, provided by the Experimental Animal Center of Nanfang Hospital, Southern Medical University, male or female, weighing (13.7±2.3) kg.

The experimental operation method is as follows: the animals were fasted for 12 hours before operation, weighed, infused through the superficial vein of the forelimb, and anesthetized by injecting pentobarbital sodium (30 mg/kg). After successful anesthesia, the trachea was intubated to maintain a patent airway. The animal dog was fixed on the operating table supine, the vascular puncture site was shaved, the radial artery pressure was dynamically monitored by the forelimb arterial puncture tube, and the central venous pressure was dynamically monitored by the forelimb venous puncture tube. The femoral artery and femoral venous pressure were dynamically monitored by catheterization in the hindlimb arteries and veins. After the animals were in a stable state, the arterial blood pressure of the fore and hind limbs, central venous pressure, and femoral venous pressure were recorded synchronously. The monitor is a Hewlett-Packard 1186A multifunctional physiological monitor, which is connected to the front and rear limb monitoring channels respectively; various physiological indicators are monitored.

When the above preparatory work is completed and the dog is fixed on the operating table lying supine, the base plate 1 of the device of the present invention is placed on the lower back of the test dog in a direction perpendicular to the long axis of the dog's body. Loosen the first joint knob 5, aim the abdominal pressure head 10 at the distal segment of the abdominal aorta on the midline of the dog’s abdomen, and the most prominent part of the arterial pulse (as a body surface mark), press down the pressure arm 6, and move the abdominal pressure head 10 toward the lumbar spine Pressurize, if there is a slight deviation in the position where the abdominal pressure head touches the abdomen, adjust the direction and position of the second joint 8 to keep the movable pillar 9 perpendicular to the operating table, so as to ensure that the distal segment of the canine abdominal aorta is pressed against the lumbar vertebral body Above, squeeze the abdominal aorta toward the lumbar vertebral body until the pulsation of the bilateral femoral arteries disappears. At this time, the blood flow of the abdominal aorta is successfully blocked. The first joint knob 5 and the second joint knob 7 are tightened and fixed to achieve the purpose of blocking the blood flow at the distal end of the abdominal aorta in vitro. Blocking time≦30 minutes.

The experimental results are as follows:

1. In vivo test after anesthesia: the average coronary perfusion pressure (CPP) before and after abdominal aorta occlusion in vitro increased from 99.84 to 107.54mmHg.

2. In cardiac arrest caused by asphyxiation after anesthesia: during cardiopulmonary resuscitation by hand chest compression, the average coronary perfusion pressure (CPP) before and after abdominal aortic occlusion in vitro increased from 22.68 to 40.71mmHg.

Claims (4)

1. a kind of external ventral aorta far-end blocking vessel is it is characterised in that include:

The bedplate of level, when deployed described bedplate be arranged on below the lower back of the human body of horizontal position；

Fixing pillar, on the fixing point of the side being vertically fixed on described bedplate；

Portable stanchion, its bottom equipped with abdominal part pressure head, for contacting and oppressing the abdominal part of the human body in horizontal position；

Arching pressure arm, its one end is connected with described fixing pillar by the first joint adjustable ground, and the other end passes through second Joint adjustable ground is connected with described portable stanchion；

Equipped with the first joint knob on described first joint, so that when described first joint knob unclamps, by described arc pressure The arm of force is opened up with described first joint for axle, to cause described bedplate can be inserted into the lower back of the human body of horizontal position Below, and make described portable stanchion and abdominal part pressure head be aligned body surface symbol；

Equipped with second joint knob on described second joint, so that when described abdominal part pressure head is downwards to abdominal compressions, by institute State the elastic deviation to adjust abdominal part ram position of second joint knob, described abdominal part pressure head is made for axle with described second joint Left and right fine setting is it is ensured that the accuracy of the ventral aorta that presses in vitro.

2. external ventral aorta far-end blocking vessel according to claim 1 it is characterised in that: the shape of described bedplate It is to be selected from: rectangle, square, rhombus, polygon, circle, ellipse.

3. external ventral aorta far-end blocking vessel according to claim 1 it is characterised in that: the work in described first joint Dynamic scope is 0 degree to 180 degree.

4. external ventral aorta far-end blocking vessel according to claim 1 it is characterised in that: the work of described second joint Dynamic scope is 0 degree to 180 degree.