CN217931604U

CN217931604U - Continuous carbon dioxide measuring device at outlet of membrane oxygenator

Info

Publication number: CN217931604U
Application number: CN202222182327.8U
Authority: CN
Inventors: 孙斌; 王立伟; 甄宁; 周美艳; 王荣国; 刘倩
Original assignee: Xuzhou Central Hospital
Current assignee: Xuzhou Central Hospital
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2022-11-29
Anticipated expiration: 2032-08-18

Abstract

The utility model discloses a membrane oxygenator export carbon dioxide continuous measurement device relates to membrane oxygenator technical field. The measuring device comprises a connecting pipe assembly, a dehumidifier, a carbon dioxide sensor and a processor; the dehumidifier is connected to an exhaust port below the membrane oxygenator main body, the carbon dioxide sensor is connected to one side, away from the membrane oxygenator, of the dehumidifier, and the carbon dioxide sensor is electrically connected with the processor. The utility model discloses an use carbon dioxide sensor measurable quantity exhaust port department carbon dioxide partial pressure to calculate carbon dioxide yield, have better advantage in the aspect of detecting the oxygen deficiency, can predict the homolacticacemia in the extracorporeal circulation earlier, be the critical low important index who fills in judging the extracorporeal circulation, to the high VCO2i patient of extracorporeal circulation, clinician can earlier intervene in, reach and reduce patient's complication, improve patient's prognostic purpose.

Description

Continuous carbon dioxide measuring device at outlet of membrane oxygenator

Technical Field

The utility model relates to a membrane oxygenator technical field, concretely relates to membrane oxygenator export carbon dioxide continuous measurement device.

Background

In recent years, complications of the central nervous system, acute kidney injury and the like of extracorporeal circulation patients remain common and serious complications after surgery, and directly affect the recovery of patients. To this end, experts have proposed a goal-directed perfusion (GDP) to maintain adequate and reasonable perfusion in the extracorporeal circulation, reducing cardiac surgical mortality and postoperative complications. The GDP is based on the indexes of perfusion flow, perfusion index, hematocrit, mean arterial pressure, oxygen partial pressure, carbon dioxide partial pressure, mixed venous oxygen saturation, lactic acid, near infrared spectrum and the like, and combines oxygen metabolism indexes of oxygen supply (DO 2), oxygen consumption (VO 2), carbon dioxide generation index (VCO 2 i) and the like to guide extracorporeal circulation perfusion flow, blood pressure management and the like, and is a refined and individualized perfusion strategy integrating various monitoring means.

The measurement of the VCO2i has better advantages in the aspect of detecting hypoxia, and is an important index for judging the critical hypoperfusion in the extracorporeal circulation. VCO2i [ ml/(m) ² ·min)]= [ expiratory CO2 (eCO 2, mm Hg) × gas flow (Ve, L/min) × 1000/760]/BSA(m ² ). However, no device is available for measuring the amount of carbon dioxide produced at the outlet of the membrane oxygenator.

In view of the above, it is necessary to provide a device capable of continuously measuring the amount of carbon dioxide produced at the outlet of the membrane oxygenator.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model discloses a membrane oxygenator export carbon dioxide continuous measurement device measures exhaust mouth department carbon dioxide partial pressure through using the carbon dioxide sensor, calculates the carbon dioxide yield to in early prediction homolactic acidemia in extracorporeal circulation is favorable to earlier intervention of clinician, reaches the purpose that reduces patient's complication, improves patient's prognosis.

According to the utility model discloses a membrane oxygenator export carbon dioxide continuous measurement device that purpose provided, including the dehumidifier that is used for getting rid of interior vapor of pipeline or liquefaction water droplet, the carbon dioxide sensor that is used for measuring the interior carbon dioxide partial pressure of pipeline and be used for calculating the treater of taking the display screen of carbon dioxide yield according to carbon dioxide partial pressure data; the dehumidifier is connected to an exhaust port below the membrane oxygenator main body, the carbon dioxide sensor is connected to one side, away from the membrane oxygenator, of the dehumidifier, and the carbon dioxide sensor is electrically connected with the processor.

Preferably, the measuring device is still including setting up in the connecting tube subassembly of gas vent and dehumidifier junction, the connecting tube subassembly includes plastic hose and adapter tube, plastic hose one end cup joints on the gas vent, and the other end cup joints on the adapter tube, the one end that plastic hose was kept away from to the adapter tube is pegged graft in the dehumidifier air inlet.

Preferably, two ends of the plastic hose are respectively bound and fixed by a binding belt.

Preferably, the carbon dioxide sensor is in threaded connection with the air outlet of the dehumidifier.

Preferably, the dehumidifier is a single-use breathing filter.

Compared with the prior art, the utility model discloses a membrane oxygenator export carbon dioxide continuous measurement device's advantage is:

(1) The measuring device can measure the partial pressure of carbon dioxide at an exhaust port by using the carbon dioxide sensor, so that the generated amount of carbon dioxide is calculated, the measuring device has better advantage in the aspect of detecting hypoxia, can predict the hyperlactacidemia in the extracorporeal circulation earlier, is an important index for judging the critical hypoperfusion in the extracorporeal circulation, and can intervene earlier for a patient with high VCO2i in the extracorporeal circulation so as to achieve the purposes of reducing the complication of the patient and improving the prognosis of the patient.

(2) The dehumidifier arranged in the measuring device can effectively remove water vapor or liquefied water drops which are often accompanied in the exhaust gas of the membrane oxygenator, so that the measuring result of the carbon dioxide sensor is more accurate.

Drawings

For a clear explanation of the embodiments or prior art solutions of the present invention, the drawings that are needed in the description of the embodiments or prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for a person skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a structural diagram of a continuous carbon dioxide measuring device at the outlet of a membrane oxygenator disclosed by the utility model.

In the figure: 1-membrane oxygenator body; 2-an exhaust port; 3-a plastic hose; 4-a transfer tube; 5-a dehumidifier; 6-carbon dioxide sensor.

Detailed Description

The following description briefly describes embodiments of the present invention with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present invention all belong to the protection scope of the present invention.

Fig. 1 shows a preferred embodiment of the present invention, which is analyzed in detail.

The continuous carbon dioxide measuring device at the outlet of the membrane oxygenator shown in figure 1 comprises a connecting pipe component, a dehumidifier 5, a carbon dioxide sensor 6 and a processor which are connected in series in sequence.

Wherein, the connecting pipe subassembly sets up in gas vent 2 and 5 junctions of dehumidifier, including plastic hose 3 and adapter tube 4, 3 one ends of plastic hose cup joint on gas vent 2, and the other end cup joints on adapter tube 4, and both ends are all binded fixedly with the ribbon. One end of the adapter tube 4 far away from the plastic hose 3 is inserted into an air inlet of the dehumidifier 5.

The dehumidifier 5 is a disposable breathing filter, is connected to the exhaust port 2 below the membrane oxygenator main body 1 through a connecting pipe assembly, and is used for removing water vapor or liquefied water drops in a pipeline, so that the accuracy of the measurement result of the carbon dioxide sensor 6 is improved. And the carbon dioxide sensor 6 is in threaded connection with the air outlet of the dehumidifier 5 and is used for measuring the partial pressure of carbon dioxide in the pipeline. The processor is electrically connected with the carbon dioxide sensor 6 and is used for calculating the generation amount of carbon dioxide according to the partial pressure data of the carbon dioxide, and the data can be displayed and exported through the display screen to facilitate later-stage scientific research.

The measuring device uses the carbon dioxide sensor 6 to measure the partial pressure of carbon dioxide at the exhaust port 2, and the processor calculates the generated amount of carbon dioxide according to the measured partial pressure of carbon dioxide and displays the generated amount of carbon dioxide through the display screen, so that a clinician can intervene earlier conveniently, and the purposes of reducing complications of patients and improving the prognosis of the patients are achieved.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The device for continuously measuring the carbon dioxide at the outlet of the membrane oxygenator is characterized by comprising a dehumidifier (5) for removing water vapor or liquefied water drops in a pipeline, a carbon dioxide sensor (6) for measuring the partial pressure of the carbon dioxide in the pipeline and a processor with a display screen for calculating the generation amount of the carbon dioxide according to the partial pressure data of the carbon dioxide; the dehumidifier (5) is connected to an exhaust port (2) below the membrane oxygenator main body (1), the carbon dioxide sensor (6) is connected to the dehumidifier (5) on the side away from the membrane oxygenator, and the carbon dioxide sensor (6) is electrically connected with the processor.

2. The membrane oxygenator outlet carbon dioxide continuous measuring device as claimed in claim 1, wherein the measuring device further comprises a connecting pipe assembly arranged at the joint of the exhaust port (2) and the dehumidifier (5), the connecting pipe assembly comprises a plastic hose (3) and an adapter pipe (4), one end of the plastic hose (3) is sleeved on the exhaust port (2), the other end of the plastic hose is sleeved on the adapter pipe (4), and one end of the adapter pipe (4) far away from the plastic hose (3) is inserted into the air inlet of the dehumidifier (5).

3. The membrane oxygenator outlet carbon dioxide continuous measuring device of claim 2, wherein the two ends of the plastic hose (3) are respectively bound and fixed by a binding belt.

4. The membrane oxygenator outlet carbon dioxide continuous measurement device of claim 1, wherein the carbon dioxide sensor (6) is in threaded connection with the air outlet of the dehumidifier (5).

5. Membrane oxygenator outlet carbon dioxide continuous measurement device as in any of claims 1-4, characterized in that the dehumidifier (5) is a single-use breathing filter.