CN2766776Y - Computerized visionary esophagus varicose veins pressure measuring apparatus - Google Patents

Abstract

The utility model relates to a computerized type vision esophagus varicose veins pressure measuring apparatus. The utility model is characterized in that a guide tube can thread out of a biopsy pore canal of an electronic gastroscope and can be fixed in the top end of the biopsy pore canal. The guide tube and the top end of the biopsy pore canal are sealed and sheathed in a transparent plastic air bag of which the surface is provided with graduation lines. The transparent plastic air bag is connected with an electronic inflation pump and a pressure sensor by a three-way pipe. A serial communication interface of the pressure sensor is connected with a serial port of a computer. A video output line of the gastroscope is connected with a video collection card of the computer. A camera head which is led in the esophagus and is arranged at the top end of the gastroscope can record the configuration of the air bag and can transmit the configuration of the air bag to the computer. Simultaneously, the computer can synchronously collect and analyze the relationship between the pressure of the air bag and the dynamic image from pressed and recessed variation of the esophagus varicose veins. When the height variation of the esophagus varicose veins lies in the relative stable platform, the pressure in the air bag is equal to the pressure of the esophagus varicose veins. Thus, the pressure of the esophagus varicose veins can be measured. The utility model can use computer vision to be instead of artificial vision so as to overcome the subjective error and the insufficient condition of artificial vision. The utility model can measure different degrees of the light, moderate and serious pressure in the esophagus varicose vein.

Description

Esophagus in computer vision cirso-piezometry instrument

Technical field:

This utility model belongs to the medical detecting Instrument technical field, particularly relates to by the form of computer system identification esophageal manometry air bag and the esophageal variceal vein internal pressure analyzer of pressure change.

Background technology:

The esophageal variceal vein internal pressure is considered to the most important index of predicting that rupture of esophageal varices is hemorrhage, thereby comes into one's own day by day." JAMA " (JAMA, 1951; 147:570～571) at first reported the direct puncture pressure measuring method of esophageal variceal vein, but venipuncture easily causes massive hemorrhage and secondary infection.Britain's " digestive tract " magazine [Gut, 1987; 28 (9): 1162～1165] reported the non-invasive esophageal variceal vein air bag manometry of utilizing cuff pressure measurement principle utility model.Germany " scope " magazine [Endoscopy, 1998; 30 (4): 326～332] introduced " esophageal variceal vein measuring cell " that Switzerland Te Er (Treier) company utilizes the air bag manometry to produce." Chinese digestive endoscopy magazine " [2002 19 volume (4) 74～76] page or leaf has been introduced a large amount of experiment in vivo and vitro results that first this esophageal variceal vein measuring cell that domestic utilization in 1999 introduces carries out, prove that measured esophageal variceal vein internal pressure and clinical manifestation dependency are good, and important value arranged the prediction rupture of esophageal varices is hemorrhage; But find also that in use the air bag manometry is measured esophageal variceal vein pressure according to air gauge, exists the artificial vision to judge the subjective deviation of vascular pressure, especially the cirso-pressure measurement deviation to little is bigger, has limited its scope of application.

Technology contents:

This utility model provides a kind of esophageal variceal vein internal pressure analyzer, measure esophageal variceal vein pressure by the form of computer system identification esophageal manometry air bag and the change of pressure, there is the deficiency of subjective error that the artificial vision is produced in existing to overcome " esophageal variceal vein measuring cell ", can measure light, in, heavy esophageal variceal vein internal pressure in various degree.

Esophagus in computer vision cirso-piezometry instrument of the present utility model, conduit 1 is passed in the biopsy duct 3 of electronic gastroscope 2, one end of conduit 1 is fixed in the top in biopsy duct 3 of electronic gastroscope 2, and the plastics esophageal manometry air bag 5 that has a graduation mark with a transparent surface with the top of electronic gastroscope 2 and conduit 1 cover within it and sealing and fixing again; The ventilating control switch 9 of electronics inflator pump 8 is tied up in electronic gastroscope 2 handle portion; It is characterized in that: on another end of conduit 1, connect tee T 7, one end of tee T 7 is connected with electronics inflator pump 8, the terminal pressure transducer 10 that connects of another of tee T 7, the serial communication interface of this pick off 10 links to each other with the serial ports of computer 11 by the RS232 universal serial bus, simultaneously the video output cable of electronic gastroscope 2 is inserted the video acquisition card plug of computer 11.

During detection, the transparent gasbag 5 that utilizes electronic gastroscope 2 that the surface is had a graduation mark earlier imports in the esophaguses 13 and makes the bottom of air bag 5 be positioned at the expensive door of stomach top, it is opened gradually and be close to esophageal wall toward air bag 5 interior slowly gas injections, see through the varicose blood vessel of transparent gasbag 5 high-visible tube wall belows, the graduation mark on the air bag 5 is the arc of rule on the esophageal variceal vein surface; Inflate up to cirso-always and fallen into by pressure fully, promptly the radian to graduation mark becomes smooth fully; It is characterized in that: computer 11 utilizes the dynamic image of the sunken esophageal variceal vein of airbag aeration pressure in 12 pairs of pressure measurement processes of electronic gastroscope 2 vertical photographic head to carry out digital image recording, synchronous acquisition is analyzed the gentle intracapsular pressure variation of this dynamic image then, obtain the blowing pressure curve in esophageal variceal vein protrusion height change curve and the esophageal manometry air bag, at the corresponding relation that fills, has in the deflation course a tangible plateau and actual vascular pressure value to exist, calculate esophageal variceal vein cavity pressure in the present image according to this height change curve.

Compare with existing " esophageal variceal vein measuring cell ", esophagus in computer vision cirso-piezometry instrument of the present utility model, the reported visual sensation cirso-is pressed sunken height change curve owing to use a computer, and pressure transducer synchronous recording esophageal manometry intracapsular pressure change curve, overcome the subjective error that naked eyes are judged; According to esophagus in computer vision cirso-pressure detection method of the present utility model, can adopt the design software program to detect the esophageal manometry intracapsular pressure and change with vascular pressure and fall into functional relationship between the height change, overcome the deficiency of former " esophageal variceal vein measuring cell " dependence artificial vision subjective judgment esophagus varicose vascular pressure; Especially detection method of the present utility model falls into the height change curve according to vascular pressure and is filling, arranged in the deflation course a tangible plateau, the esophageal manometry intracapsular pressure equates with the vascular pressure value of reality during plateau, calculate esophageal variceal vein cavity pressure in the present image thus, can measure light, in, heavy esophageal variceal vein internal pressure in various degree, there is no identical or similar report in this publication and Searches of Patent Literature at home and abroad.

The instantaneous pressure that this utility model utilizes computer system real time record esophageal variceal vein internal pressure to equate with intracapsular pressure, promptly obtain the esophageal variceal vein internal pressure, and the esophageal variceal vein internal pressure is to judge liver cirrhosis esophageal variceal vein one of the hemorrhage important indicator of whether breaking, for prediction and chemoprophylaxis liver cirrhosis rupture of esophageal varices are hemorrhage very important effect arranged, have clinical widely and research application is worth.And system synthesizes in a computer, and is simple to operate.

Description of drawings:

Fig. 1 is the connection and the pressure measurement sketch map of esophagus in computer vision cirso-piezometry instrument of the present utility model.

Fig. 2 is the local connection diagram in gastroscope top

The specific embodiment:

The utility model is described in further detail below in conjunction with drawings and Examples.

Embodiment 1:

At first assemble out esophagus in computer vision cirso-piezometry instrument of the present utility model, as shown in Figure 1, 2: conduit 1 is passed in the biopsy duct 3 of electronic gastroscope 2, an end of conduit 1 is fixed on the top in the biopsy duct 3 of electronic gastroscope 2 with hollow screw 4, the transparent esophageal balloon 5 that again surface is had graduation mark is enclosed within the top of electronic gastroscope 2 and uses adhesive waterproof tape 6 sealing and fixing, wherein comprises in the top, biopsy duct with hollow screw 4 fixed conduits 1; Connect tee T 7 on conduit 1 another end, an end of tee T 7 is connected with electronics inflator pump 8, and the ventilating control switch 9 of electronics inflator pump 8 is tied up in electronic gastroscope 2 handle portion; Tee T 7 another terminal pressure transducers 10 that connect, the serial communication interface of this pick off 10 links to each other with the serial ports of computer 11 by the RS232 universal serial bus, simultaneously the video output cable of electronic gastroscope 2 is inserted the video acquisition card plug of computer 11.

The esophageal variceal vein measuring cell (EVM EsophagealVarix Manometer.Treier Endoscopic AG.Berom ü nster.Switzerland.) that adopts Switzerland Te Er (Treier) company to produce in the present embodiment, the gas return path system that provides esophageal balloon 5, conduit 1, electronics inflator pump 8 to form a sealing, filling, exitting and control with 9 pairs of air bags 5 of gauge tap; Air bag 5 selects for use the not expansible vinyon of thickness 0.013mm to make, length 5cm, diameter 3.5cm, bigger slightly than esophagus 13 diameters, so the phenomenon that air bag struts fully can not take place in esophagus, the surface of air bag 5 is labeled on parallel black horizontal line and the horizontal line graduation mark at a distance of 5mm, is beneficial to the dynamic tracking record of 11 pairs of esophageal variceal vein images of computer; Adopt Japan to produce Olympus-240 electronic gastroscope 2 distinct image is provided.The model that is provided by electronics science institute pick off development centre, Anhui is provided pressure transducer 10 is the KYB-206296 pressure transducer.What computer 11 image pick-up cards adopted is the SDK-2000 video frequency collection card of sky quick figure sign indicating number company, inserts in the computer slot.

When implementing esophageal variceal vein pressure measurement operation, earlier gastroscope 2 is inserted to gastric, press the gas injection knob on the remote switch 9, transparent plastic esophageal manometry air bag 5 parts that make folding surface have graduation mark are earlier launched, make by the button of bleeding again and stay a small amount of gas in the air bag 5, gastroscope 2 back retreats to the hypomere of esophagus 13 then, make the bottom of air bag 5 be positioned at stomach cardia top, select the cirso-of maximum gauge as the detected pressures blood vessel by perusal, it is opened gradually and be close to esophageal wall toward air bag 5 interior slowly gas injections, see through the varicose blood vessel of transparent gasbag 5 high-visible tube wall belows, the graduation mark on the air bag 5 is the arc of rule on the esophageal variceal vein surface; Inflate up to cirso-always and press to be fallen into fully, promptly the radian to graduation mark becomes smooth fully, closes the gas valve of remote switch 9 this moment, stops and moments later presses evacuating valve again, takes out the air in the most air bag 5 fully, finishes gaging operating process.

Computer pressure measurement process is divided into intravital gastroscope image and pressure data acquisition phase and external offline image and two stages of pressure treatment; Computer 11 is intactly noted down whole pressure measurement process, this computer 11 is gathered the electronic gastroscope Digital Image Data by video frequency collection card, be compressed into video file, by pressure transducer 10 just the pressure utilization that provides of electronics inflator pump 8 convert corresponding digital signal to, gather pressure value by serial ports again, and utilize a sound channel in the video signal to be saved in the video image synchronously; In the body acquisition phase as mentioned above, in the external processed offline stage, computer system has adopted Computer Processing algorithms such as rim detection, viewpoint tracking, curve fitting to the black line on esophageal balloon surface.

Computer can select compression and non-compress mode to preserve video information in image and pressure acquisition process, and the file of being set up of looking tired utilizes offline inspection to handle for next step computer.The computer offline detector provides a close friend's user interface, and the user at first selects the bigger video segment of esophagus varicose amplitude in the video signal of complete preservation testing process, comprises one to twice fill, deflation course usually.After the user set beginning and end position, program was read each width of cloth image and the corresponding intracapsular pressure value in the video file, and all images are carried out background extracting, obtains the background picture of esophagus; Each frame in this background picture of reuse and the video file is done computing, obtains the foreground picture of each width of cloth picture, mainly comprises the black line part of air bag in this foreground picture; Again foreground image is carried out denoising, corrosion and Refinement operation, obtain black line comparatively clearly.After this user selects the bigger blood vessel of varicose amplitude, with click 3 points, is two starting points and peak of sign varicose part blood vessel; When the user selected to handle beginning, the position of identification point in the width of cloth image calculated the height value of reflection varicosis degree and the force value of this frame simultaneously under program was determined according to the position of three identification points in the last piece image.

In real video, owing to reasons such as esophageal peristalsis, breathings, make the video image appearance shake by a relatively large margin of collection, the identification point of piece image can appear can not determine down in trace routine like this, in this case, the user utilizes observation once more, again determine the position of new identification point with click, continue said process, just can obtain to fill, the deflation course medium vessels is subjected to its height in the air bag extrusion process (being above-mentioned varicose two starting points partly and the vertical dimension of peak) and the change procedure of pressure.L-G simulation test shows, the height change curve is filling, is having a tangible plateau in the deflation course, the esophageal manometry intracapsular pressure equates with the vascular pressure value of reality during this plateau, program is wholely filled, behind the pressure curve and altitude curve of deflation course, is calculated esophageal variceal vein cavity pressure in the present image obtaining.

Claims (1)

1, a kind of esophagus in computer vision cirso-piezometry instrument, conduit is passed in the biopsy duct of electronic gastroscope, one end is fixed in the top in biopsy duct of electronic gastroscope, and the plastics esophageal manometry air bag that has a graduation mark with a transparent surface with the top of electronic gastroscope and sheathed catheter within it and sealing and fixing again; It is characterized in that: on another end of conduit, connect tee T, one end of tee T is connected with the electronics inflator pump, the terminal pressure transducer that connects of another of tee T, the serial communication interface of this pick off links to each other with computer by serial by the RS232 universal serial bus, simultaneously the video output cable of electronic gastroscope is inserted the video acquisition card plug of computer.

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