CN107469162B - High-precision venous drainage device - Google Patents
High-precision venous drainage device Download PDFInfo
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- CN107469162B CN107469162B CN201710751008.5A CN201710751008A CN107469162B CN 107469162 B CN107469162 B CN 107469162B CN 201710751008 A CN201710751008 A CN 201710751008A CN 107469162 B CN107469162 B CN 107469162B
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- A61M1/0023—
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/71—Suction drainage systems
- A61M1/74—Suction control
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2202/00—Special media to be introduced, removed or treated
- A61M2202/04—Liquids
- A61M2202/0413—Blood
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Abstract
The invention discloses a high-precision venous drainage device which comprises an external panel, a negative pressure source access port, a pressure adjusting air passage, a negative pressure output port, an air passage control switch and a visual pressure display device, wherein the external panel is connected with the negative pressure source access port; the pressure regulating air passage can control the negative pressure with high precision; the pressure regulating air passage forms a special vortex to further regulate and control the pressure; the positive and negative pressure protection function provides positive pressure protection and high negative pressure protection, and danger is prevented from occurring in the using process. By using the invention, the venous blood drainage quantity can be increased only by loading a stable negative pressure source into the closed blood reservoir, and the method is simple and convenient. Besides the use of a small venous cannula, the tissue trauma is reduced, and the size of the extracorporeal circulation device (CPB) circuit is reduced, so that the CPB priming volume is reduced, the blood dilution is obviously reduced, and the platelet consumption is reduced.
Description
Technical Field
The invention relates to a venous drainage device, in particular to a negative pressure adjustable venous drainage device.
Background
During extracorporeal Circulation (CPB) cardiac repair, blood from the heart is drawn from the superior vena cava (VS), inferior Vena Cava (VCI), or atrium by negative pressure through one or more venous catheters into an oxygenator and a blood pump back to the aorta. In practice, because different arterial blood flows and reflux amounts are different, the fixed value negative pressure provided by the negative pressure source is not enough to meet the individual requirements in the current operation, and it is necessary to design and manufacture a negative pressure adjusting device for venous drainage.
Patent CN202143745U is a transparent negative pressure drainage device for arteriovenous flap, which uses medical self-adhesive and medical sponge to form a negative pressure drainage area, and after a negative pressure source is connected, the negative pressure is extremely high. The device adopts low negative pressure drainage, realizes accurate pressure control, avoids the damage of high negative pressure to the operation, and prevents the possibility of danger in the operation.
Patent CN202376607U provides a sustainable device that washes of low negative pressure, and the device design is pressed close to clinically, relies on multi-pipeline partial pressure, intercommunication atmosphere to realize negative pressure control, has avoided the damage that artificial improper operation brought to a certain extent, and the negative pressure is adjusted the degree of difficulty big, and pressure control is accurate inadequately, and application scope is restricted in aspects such as hydrops, wound surface attract. The device can accurately set an extremely low negative pressure value, and can be quickly used for various operations, particularly for the operations requiring venous drainage in cardiac surgery.
Patent CN204582083 is a drainage device that negative pressure is adjustable, facilitates the use, and the device is used for bearing liquid from taking two drainage bags, and whole equipment is miniaturized to be provided with and prevent suck-back device. Compared with the device for controlling the negative pressure, the device of the invention is more stable and accurate, not only can be used for absorbing the effusion, but also can be applied to the extracorporeal circulation in the operation.
Patent CN105169508A is a device for determining venous inflow to a blood reservoir of an extracorporeal blood circulation. The device controls various instruments in extracorporeal circulation through a singlechip, and is clamped by a throttling device to limit the flow area of an inlet so as to realize pressure regulation. Patent CN101862497B is a cylindrical pressure control valve, which is inserted into a spiral groove by means of up-and-down adjustment of a spiral rod, i.e. the inlet flow area controls the pressure. The device of the invention designs and manufactures two air passages of vortex pressure reduction and rotational flow pressure reduction, and simultaneously completes the adjustment of negative pressure in the aspects of air passage structure, air passage flow area and inlet flow area, and the pressure control is more accurate and stable.
Disclosure of Invention
In order to overcome the defects mentioned in the background technology and perfect various functions, the invention provides the venous drainage device which can accurately adjust negative pressure, has wide application range and convenient use and has positive pressure and super-negative pressure protection. The negative pressure can be precisely adjusted, and the pressure adjusting air passage is designed.
In order to achieve the purpose, the invention adopts the technical scheme that:
a high-precision venous drainage device comprises an external panel, a negative pressure source access port, a pressure adjusting air passage, a negative pressure output port, an air passage control switch and a visual pressure display device;
the negative pressure output port is fixedly provided with a pressure sensor, a positive pressure protector and an overpressure protector and is connected to the blood reservoir;
the air passage control switch is arranged at the joint of the pressure reducing air passage and the negative pressure output port, a control slide block used for limiting the size of the outlet of the vortex pressure reducing air passage is arranged inside the air passage control switch, an adjusting block is arranged outside the air passage control switch, and the adjusting block drives the control slide block to move through movement;
the visual pressure display device is connected with the pressure adjusting air passage and has a pressure display function, a positive and negative pressure protection function and a feedback function. The external panel is connected with the visual pressure display device.
The pressure regulating air passage 1 is divided into a vortex pressure reducing air passage 4 or a rotating flow pressure reducing air passage 6. Be equipped with a plurality of rectangles on the inner wall of vortex decompression air flue 4 and block the piece, the rectangle blocks one-to-one about the piece, forms unsmooth complex vortex decompression air flue from this, and the upper portion of vortex decompression air flue is equipped with external regulating block, adjusts the height of vortex decompression air flue through adjusting external regulating block, and the altitude variation of vortex decompression air flue changes the size of vortex decompression air flue, and then changes vortex pressure size.
The rotational flow pressure reduction air passage 6 comprises a hollow cylinder and an inner cylinder, the inner cylinder is placed in the hollow cylinder, the outer surface of the inner cylinder is provided with an irregular stop block, and the inner surface of the hollow cylinder is provided with hollow teeth; the hollow teeth are used as gas buffering gaps of the air passages, and the blocking blocks are matched with the hollow teeth to form the rotational flow pressure reduction air passages.
The technical scheme of the invention has the following advantages: 1. the invention is provided with the pressure adjusting air passage, adopts the scheme that the vortex pressure reducing air passage or the rotational flow pressure reducing air passage realizes accurate adjustment on the negative pressure, improves the stability and the accuracy of the use of the negative pressure, and is beneficial to preventing the danger caused by the pressure; 2. the invention adopts low negative pressure drainage, avoids the damage of high negative pressure to the operation process and prevents danger; 3. the device is simpler to operate, only needs to be connected with the inlet and the outlet as required in use, is convenient and can be put into use quickly; 4. the application range is wide.
The device is miniaturized, and the operation required for drainage and perfusion is less, so that the development trend of the miniaturization of the CPB pipeline can be met, the CPB precharge volume is reduced, the blood dilution is obviously reduced, and the platelet consumption is reduced, thereby reducing the blood consumption and improving the economic benefit. A high-precision venous drainage device is designed according to a central negative pressure source of a hospital, the central negative pressure is about-0.08 MPa, the total regulation range is set to be 0-100 mmHg, and over-100 mmHg is protected by overpressure. Blood destruction may be increased by negative pressures exceeding-80 mmHg. The negative pressure is controlled between minus 30 and minus 70mmHg, and the error value is in the range of plus or minus 0.1 mmHg. And is designed with positive pressure protection to prevent blood reverse perfusion.
Drawings
The drawings illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. The components in the drawings are not necessarily to scale, and each identical component is designated by an identical reference numeral.
FIG. 1 is a schematic view of a high precision venous drainage device;
FIG. 2 is a top view of a vortex pressure reducing airway of the pressure regulating airway in accordance with embodiment 1 of the present invention;
FIG. 3 is a sectional view of a vortex pressure reducing airway of the pressure regulating airway according to embodiment 1 of the present invention;
fig. 4 is a schematic view of a rotational flow decompression airway of the pressure regulating airway according to embodiment 2 of the present invention.
In the figure: 1. a pressure regulating airway; 2. negative pressure source access port a; 3. a negative pressure output port a; 4. a vortex pressure reducing airway; 5. an airway control switch; 6. a rotational flow pressure reducing airway; 7. a negative pressure source access port b; 8. a negative pressure output port b; 9. a central cylinder; 10. a pressure regulating airway; 11. a blocking block; 12. empty teeth.
Detailed Description
The invention will be described in more detail below with reference to an exemplary embodiment and the accompanying drawings.
Two embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As used herein, a "rectangular blocker" refers to one or more blockers that may be the same or different in length or height; as used herein, "upper side" and "lower side" are used for descriptive purposes only and do not specifically refer to a particular direction, and "upper side" may also be lower, left, right, etc.
In the high-precision venous drainage device of the embodiment, the design is mainly started by functional design, positive pressure protection and overpressure protection are guaranteed, especially, a pressure regulation air passage is realized, a vortex pressure reduction air passage or a rotating flow pressure reduction air passage is realized, the accurate regulation of negative pressure is guaranteed, and the stability and the accuracy of negative pressure use are improved.
vortex decompression air flue 4 is inside to contain the rectangle and blocks the piece, totally one, two or many teeth, and the one-to-one about the intertooth tooth forms a peculiar vortex decompression air flue, and its height can be adjusted through external adjust knob to the piece on the vortex decompression air flue, and altitude variation changes air flue passage structure size, and when the passageway that gas flow formed through the maze piece, through many times right angle turn, the speed flow direction changes, forms the vortex and causes energy loss, and then changes the pressure size.
The air passage control 5 is connected with the vortex pressure reducing air passage and the negative pressure output port a3, the external adjusting block moves and drives the control slide block inside the device to move, and the size of the outlet of the vortex pressure reducing air passage moved by the slide block is limited by the position of the slide block, so that the auxiliary pressure control function is realized. The whole body is matched to realize the accurate adjustment of the negative pressure.
The blood storage device is used for entering the blood storage device after blood enters the negative pressure channel when connection problems occur, and the blood is prevented from entering an air passage or a negative pressure source.
The starting of switch module control instrument is closed, and the function that the switch was opened or was closed relies on the rotation to block the piece and realizes, blocks the piece and includes baffle, rotating member, relies on the different air flue exports of baffle intercommunication, realizes the switch function. And when the switch is in an open state, the connection between the negative pressure outlet and the atmosphere is closed, and at the moment, the negative pressure outlet is output according to the display value of the pressure value.
The positive and negative pressure protection is realized by the fact that one section of the air passage is internally connected with two one-way valves to realize functions, the other side of the one-way valve is connected with the atmosphere, and when positive pressure or overpressure occurs, the one-way valve is communicated with the atmosphere to change the pressure in the air passage and realize the pressure protection function.
The negative pressure value is displayed by connecting the barometer with the air passage to obtain the pressure value, so that the real-time display of the negative pressure and the output of the regulated pressure are realized. The pressure display has a feedback function, and the set pressure value is consistent with the output pressure value through the electric control adjusting device. The negative pressure input can be directly connected to a negative pressure source of a hospital or a small negative pressure machine.
Example 2 is independent of example 1. The difference is that in embodiment 2, the pressure regulating airway 1 adopts a spiral airway, namely the rotational flow pressure reducing airway 6, to realize negative pressure control, a negative pressure source is connected to the inlet of the rotational flow pressure reducing airway 6, namely the negative pressure source inlet b7, and gas is output through the negative pressure output port b8 after passing through the rotational flow pressure reducing airway 6 and the central cylinder 9 region. The output port is connected with a blood storage device which is connected with a negative pressure interface when the human body is in venous drainage. And a pressure sensor and positive and negative pressure protection are fixed at the negative pressure output port, and the pressure sensor transmits the acquired pressure to a panel for display.
The rotating flow pressure reduction air passage 6 is wrapped by a hollow cylinder structure, a central cylinder 9 capable of moving up and down is placed inside the cylinder, a designed blocking block rotating around the cylinder is arranged on the surface of the cylinder, the rotating flow pressure reduction air passage is formed, an irregular blocking block 11 is arranged on the outer thread part of the central cylinder 9, irregular hollow teeth 12 are formed on the inner wall of the hollow cylinder, and the hollow teeth 12 serve as air buffering gaps of the air passages to form the rotating flow pressure reduction air passage. The central cylinder 9 changes the vertical position and the inlet area, thereby realizing the adjustment of the pressure. When the inner cylinder is completely sunk into the bottom, the rotating flow pressure reduction air passage just covers the bottom to the lower edge of the inlet of the first air passage, the inlet is in contact with the smooth plane on the upper part of the inner cylinder to form a closed state, and at the moment, the air cannot circulate. When the internal cylinder moves upwards to the position of the air passage inlet, the air passage inlet and outlet are in a communicated state, gas is decompressed to the air passage outlet through the rotational flow, and negative pressure is output from the air passage outlet. The connection and function of the blood reservoir and other components are the same as those of embodiment 1.
The device can be applied to venous blood drainage in the operation only by loading a stable negative pressure source, the method is simple and convenient, and the negative pressure can be accurately adjusted. Besides the use of a small venous cannula, the tissue trauma is reduced, and the size of the extracorporeal circulation device (CPB) circuit is reduced, so that the CPB priming volume is reduced, the blood dilution is obviously reduced, and the platelet consumption is reduced. The device is designed according to a central negative pressure source of a hospital, the central negative pressure is about-0.08 MPa, the total regulation range is set to be 0-100 mmHg, and over-pressure protection is realized when the central negative pressure exceeds-100 mmHg. Blood destruction may be increased by negative pressures exceeding-80 mmHg. The negative pressure is controlled between minus 30 and minus 70mmHg, and the error value is in the range of plus or minus 0.1 mmHg.
The above description is two embodiments of the present invention, and is not limited to the present invention. Variations and modifications of the above would occur to those skilled in the art, but are within the scope of the invention as defined by the appended claims.
Claims (1)
1. The utility model provides a high accuracy venous drainage device which characterized in that: the device comprises an external panel, a negative pressure source access port, a pressure adjusting air passage, a negative pressure output port, an air passage control switch and a visual pressure display device; the pressure regulating air passage is a vortex pressure reducing air passage; the negative pressure output port is fixedly provided with a pressure sensor, positive pressure protection and negative pressure protection and is connected to the blood reservoir; the air passage control switch is arranged at the joint of the vortex pressure-reducing air passage and the negative pressure output port, a control slide block used for limiting the size of the outlet of the vortex pressure-reducing air passage is arranged inside the air passage control switch, an adjusting block is arranged outside the air passage control switch, and the adjusting block drives the control slide block to move through movement;
the visual pressure display device is connected with the pressure adjusting air passage; the external panel is connected with the visual pressure display device;
be equipped with a plurality of rectangles on the inner wall of vortex decompression air flue and block the piece, the rectangle blocks the piece one-to-one from top to bottom, forms unsmooth complex vortex decompression air flue from this, and the upper portion of vortex decompression air flue is equipped with external regulating block, adjusts the height of vortex decompression air flue through adjusting external regulating block, and the altitude variation of vortex decompression air flue changes the size of vortex decompression air flue, changes vortex pressure size.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710751008.5A CN107469162B (en) | 2017-08-28 | 2017-08-28 | High-precision venous drainage device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710751008.5A CN107469162B (en) | 2017-08-28 | 2017-08-28 | High-precision venous drainage device |
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| CN107469162A CN107469162A (en) | 2017-12-15 |
| CN107469162B true CN107469162B (en) | 2020-10-27 |
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| CN201930420U (en) * | 2011-01-26 | 2011-08-17 | 中国人民解放军第三军医大学第二附属医院 | Portable pressurization system for inhaling air |
| CN102430492A (en) * | 2011-09-22 | 2012-05-02 | 清华大学 | Gas ejector pair capable of restraining high pressure gas from leakage and working method thereof |
| CN104399134A (en) * | 2014-11-20 | 2015-03-11 | 樊理华 | Pressure control pipe for autologous blood transfusion and use method for pressure control pipe |
| CN104997550A (en) * | 2015-02-15 | 2015-10-28 | 首都医科大学宣武医院 | Automatic thrombolysis system for blood vessels |
| WO2016070147A1 (en) * | 2014-10-31 | 2016-05-06 | Cerevasc, Llc | Methods and systems for treating hydrocephalus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2303624Y (en) * | 1997-01-13 | 1999-01-13 | 中国石化齐鲁石油化工公司 | Venous blood-taking apparatus |
| JP3534058B2 (en) * | 1999-10-29 | 2004-06-07 | 株式会社ジェイ・エム・エス | Suction connector and suction catheter using the same |
| JP2006272131A (en) * | 2005-03-29 | 2006-10-12 | Fuji Photo Film Co Ltd | Method and apparatus for reaction |
| CN205055150U (en) * | 2015-10-12 | 2016-03-02 | 李卫校 | Vein thrombus suction device and use device's intake system |
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2017
- 2017-08-28 CN CN201710751008.5A patent/CN107469162B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1033605A (en) * | 1987-07-01 | 1989-07-05 | 格布鲁特-布勒公司 | Pneumatic conveyor system |
| CN201516231U (en) * | 2009-09-08 | 2010-06-30 | 宋九宏 | Drainage tube and glue film arrangement structure |
| CN201930420U (en) * | 2011-01-26 | 2011-08-17 | 中国人民解放军第三军医大学第二附属医院 | Portable pressurization system for inhaling air |
| CN102430492A (en) * | 2011-09-22 | 2012-05-02 | 清华大学 | Gas ejector pair capable of restraining high pressure gas from leakage and working method thereof |
| WO2016070147A1 (en) * | 2014-10-31 | 2016-05-06 | Cerevasc, Llc | Methods and systems for treating hydrocephalus |
| CN104399134A (en) * | 2014-11-20 | 2015-03-11 | 樊理华 | Pressure control pipe for autologous blood transfusion and use method for pressure control pipe |
| CN104997550A (en) * | 2015-02-15 | 2015-10-28 | 首都医科大学宣武医院 | Automatic thrombolysis system for blood vessels |
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| CN107469162A (en) | 2017-12-15 |
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