JP2003235846A - Pulmonary thrombus/embolism detection monitoring device utilizing doppler echo - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultrasonic Doppler echo device with alarm for detecting the occurrence of a pulmonary thrombus/embolism since there is no detector for such a disease to occur after a surgical operation at present. <P>SOLUTION: An ultrasonic echo sensor installed on the walls of the chest of a patient is altered into form to be turned toward a direction where the pulmonary artery can be observed at all times. Then, the blood velocity of the pulmonary artery in the trunk of the pulmonary artery is continuously measured by this ultrasonic Doppler echo device, the deceleration of the blood velocity caused by the occurrence of the thrombus in the pulmonary artery is sensed, an alarm is sounded and a caution is raised to a medical worker. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[Field of Industrial Application] This invention is used during surgery.
The present invention relates to a monitor device using a Doppler echo device which is specified for detection of fatal pulmonary thrombosis and embolism occurring in post-operative patients (especially cancer patients and obese patients).

[Prior Art] Conventionally, it has not been known that pulmonary thrombosis / embolism frequently occurs during and after surgery. Therefore, there is a medical device as a monitoring monitor for pulmonary thrombosis / embolism. Not not.

[Problems to be Solved by the Invention] First,
In order to use the ultrasonic Doppler / echo device as a monitor for detection of pulmonary thrombosis / embolism, it is necessary to keep the sensor (ultrasonic wave oscillating / receiving part) of the ultrasonic Doppler / echo disconnect device at the patient's pulmonary artery. .. For this reason, the receiving area of the sensor in the patient's esophagus is designed as shown in FIG. 3 so as to face the pulmonary artery.

Second, in order to use the ultrasonic Doppler / echo device as a monitor for detecting pulmonary thrombosis / embolism, it is provided with a calculation / display part for detecting the velocity of blood in the main trunk of the pulmonary artery and displaying it as a numerical value on an indicator. Need to be.

Thirdly, since this monitor for detecting pulmonary thrombosis / embolism is more useful clinically, this monitor is used when a blood clot / embolus enters (flies) around the pulmonary artery of a patient and the pulmonary artery blood velocity decreases. Recognizes this and issues an alarm sound when the blood velocity decreases by about 30%.

[Means for Solving the Problem] A person breathes. Since the air-filled lungs enter between the ultrasonic Doppler echo sensor and the pulmonary artery, the blood flow in the pulmonary artery becomes temporarily undetectable when the patient inhales. On the other hand, it is assumed that the pulmonary thrombosis / embolism detection monitor remains displaying the pulmonary arterial blood flow velocity value detected during expiration during inspiration.

This pulmonary thrombosis / embolism detection monitor stores the blood flow velocity of the pulmonary artery when it is installed in a patient as a 100% value, and compares the measured value after that with this initial measured value to obtain the initial value. When it becomes 70% or less, an alarm shall sound.

Since the main trunk of the pulmonary artery is located under the chest wall at the left edge of the third intercostal sternum, the ultrasonic Doppler sensor is placed at the left edge of the third intercostal sternum.

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, an ultrasonic Doppler echo sensor placed on the left edge of the third intercostal sternum of the patient's chest wall measures the moving speed of blood in the main trunk of the pulmonary artery to obtain pulmonary arterial blood. It is a pulmonary artery thrombosis / embolism monitoring device that uses an ultrasonic Doppler echo device that warns the presence of thrombus / embolus in the pulmonary artery by the flow velocity.

The pulmonary arterial blood flow velocity measured at the time of exhalation and the production of the ratio to the initial value shall be produced by a built-in computer installed with appropriate software.

This machine considers a decrease in pulmonary artery blood flow to about 70% as occurrence of pulmonary thrombosis / embolism, and sounds an appropriate audio alarm when the ratio value falls below 70%. To do.

[Embodiment] An embodiment will be described with reference to the drawings. FIG. 1 is an overall view of an actual specification in which an ultrasonic sensor of an ultrasonic Doppler echo device is mounted on the anterior chest wall of a patient.

FIG. 2 shows the relationship between the anterior chest wall sensor installed so as to face the pulmonary artery and the pulmonary artery.

FIG. 3 shows a state in which the ultrasonic waves emitted from the ultrasonic wave oscillating source in the ultrasonic sensor are projected onto the blood flowing in the pulmonary artery. The moving speed of the blood is known by being reflected by red blood cells in the blood and returning to the sensor.

[Effects of the Invention] The present invention is carried out in the form described above, and has the effects described below.

Until now, no monitor for pulmonary thrombosis / embolism has been reported. The course of pulmonary thrombosis / embolism is unknown. This disease is known to occur suddenly and is often fatal, but details are unknown. The device of this monitor can be diagnosed with the onset of this disease and the treatment can be started, so that it can be expected to significantly improve the postoperative life prognosis of the patient.

Pulmonary thrombosis / embolism suddenly develops and changes rapidly with chest pain / breathing difficulty, but since this monitor sounds an alarm with the onset of pulmonary thrombosis / embolism, the onset of this disease can be immediately diagnosed and treatment is started. it can.

[Brief description of drawings]

FIG. 1 is an overall image of a pulmonary thrombosis / embolism monitor in which the ultrasonic sensor of the present invention is applied to the chest wall of a patient. A modified ultrasonic sensor is attached to the left margin of the third intercostal sternum on the chest wall. Overall, it is very similar to an ultrasonic Doppler echo device, except that the sensor faces the main trunk of the pulmonary artery and has an alarm speaker attached.

FIG. 2 is a diagram in which the ultrasonic sensor of the present invention is applied to the chest wall and the sensor is directed to the pulmonary artery in the patient's body.

FIG. 3 is a longitudinal cross-sectional image of a pulmonary artery main trunk showing how red blood cells in blood in the pulmonary artery main trunk are exposed to ultrasonic waves under ultrasonic search.

[Explanation of symbols]

(1) Pulmonary thrombosis / embolism detection monitor main body (consisting of ultrasonic Doppler / echo device main body and internal computer) (2) Wiring connecting ultrasonic sensor to main body (3) Ultrasonic sensor (ultrasonic oscillation Part and the reflected ultrasonic wave detection part.) (4) is a display plate (made of liquid crystal) attached to the main body of pulmonary thrombosis / embolism (5) is a speaker (for alarm sounding) (6) is an ultrasonic sensor The patient's chest wall to be installed (position: left margin of the third intercostal sternum) (7) The patient's pulmonary artery main trunk (8) is the patient's heart (9) The ultrasonic waves emitted from the ultrasonic sensor (actually invisible) (10) The blood vessel wall (11) of the pulmonary artery is red blood cells flowing in the blood in the pulmonary artery.

Claims (4)

[Claims] 1. A Doppler echo device for measuring the pulmonary blood flow velocity by observing the main trunk of the pulmonary artery with a topler echo sensor on the chest wall. 2. A Doppler echo sensor portion which can be installed on the chest wall of a patient and whose sensing direction can be directed to the main trunk of the pulmonary artery. 3. A memory device for storing the previous value when the sensor cannot measure the blood flow in the pulmonary artery due to the breathing of the patient. 4. Software that warns an alarm when the blood flow velocity in the pulmonary artery is reduced due to a thrombus / embolus flying to the periphery of the pulmonary artery.