CN114176642A - Intravascular deflection angle testing device - Google Patents
Intravascular deflection angle testing device Download PDFInfo
- Publication number
- CN114176642A CN114176642A CN202111633212.XA CN202111633212A CN114176642A CN 114176642 A CN114176642 A CN 114176642A CN 202111633212 A CN202111633212 A CN 202111633212A CN 114176642 A CN114176642 A CN 114176642A
- Authority
- CN
- China
- Prior art keywords
- fixing
- intravascular
- transducer catheter
- testing device
- deflection angle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/12—Diagnosis using ultrasonic, sonic or infrasonic waves in body cavities or body tracts, e.g. by using catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
- A61B8/0883—Detecting organic movements or changes, e.g. tumours, cysts, swellings for diagnosis of the heart
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
- A61B8/0891—Detecting organic movements or changes, e.g. tumours, cysts, swellings for diagnosis of blood vessels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/48—Diagnostic techniques
- A61B8/488—Diagnostic techniques involving Doppler signals
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/58—Testing, adjusting or calibrating the diagnostic device
- A61B8/587—Calibration phantoms
Abstract
The invention discloses a device for testing an intravascular deflection angle, and relates to the technical field of vascular imaging. The ultrasonic transducer catheter fixing device comprises a phantom fixing member for fixing a phantom, an ultrasonic transducer catheter fixing assembly for fixing an ultrasonic transducer catheter and enabling a probe of the ultrasonic transducer catheter to be located in the phantom, and an angle adjusting member arranged on the phantom fixing member and enabling the probe and the phantom axis to form any angle. Aims to provide an imaging device which can be used for adjusting the eccentric angle between an intravascular ultrasonic transducer catheter and the axis of a blood vessel.
Description
Technical Field
The invention relates to the technical field of blood vessel imaging, in particular to a device for testing an intravascular deflection angle.
Background
Aiming at some special application scenes such as critical illness and the like in clinic, the traditional gold standard 'thermodilution method' for clinically measuring cardiac output has larger trauma and certain danger. The ultrasonic Doppler technology and the ultrasonic cross section measuring technology of the inner wall of the blood vessel are combined with the ultrasonic transducer catheter in the blood vessel, so that the heart discharge value of a patient in the operation can be monitored in real time more directly, accurately and safely.
In the process of measuring the blood flow velocity by applying the Doppler principle in an actual blood vessel, the ultrasonic transducer catheter reaches the measurement position of the cardiac artery by a far-end catheter placement technology, a certain deflection included angle is inevitably formed between an ultrasonic beam and the central axis of the blood vessel, the position of the catheter cannot be adjusted at the near end, and the deflection angle is a main error source of the flow velocity measurement value. Therefore, in order to accurately monitor real-time cardiac output values of critically ill patients during surgery, the flow rate measurement error caused by the deflection angle must be compensated. When the intravascular ultrasonic transducer catheter is used for imaging blood vessels, when the blood vessels are deflected by one angle, the corresponding images change from the area, the long axis of the circle and the gray value of each point of the images, and if the characteristic relations between different deflection angles and the corresponding images can be obtained, an angle-characteristic function curve can be fitted, so that the compensation of the deflection angles is realized, and the central discharge capacity of a special patient can be accurately monitored.
However, in the existing testing device, there is no related imaging device for adjusting the eccentric angle between the intravascular ultrasound transducer catheter and the axis of the blood vessel, so that the corresponding characteristics and relationships of the obtained intravascular ultrasound images at different deflection angles cannot be determined, and the accurate real-time cardiac output measurement value obtained subsequently is influenced.
Disclosure of Invention
The invention mainly aims to provide a device for testing the deflection angle in a blood vessel, and aims to provide an imaging device which can be used for adjusting the eccentric angle between an ultrasonic transducer catheter in the blood vessel and the axis of the blood vessel.
In order to achieve the purpose, the invention provides an intravascular deflection angle testing device, which comprises a dummy fixing piece used for fixing a dummy, an ultrasonic transducer catheter fixing assembly used for fixing an ultrasonic transducer catheter and enabling a probe of the ultrasonic transducer catheter to be located in the dummy, and an angle adjusting piece arranged on the dummy fixing piece and enabling the probe and the axis of the dummy to form any angle.
In an embodiment of the application, the dummy fixing part includes a first fixing portion connected to the angle adjustment part and having a semicircular notch, and a second fixing portion press-fitted on the first fixing portion and having a semicircular notch, and the semicircular notch of the first fixing portion and the semicircular notch of the second fixing portion are mutually matched to form a blind hole for fixing the dummy.
In an embodiment of the present application, the ultrasound transducer catheter securing assembly includes a lift for driving a probe of an ultrasound transducer catheter up and down.
In an embodiment of the present application, the ultrasound transducer catheter fixing assembly further includes a traverse portion connected to the lifting portion for driving a probe of an ultrasound transducer catheter to move along a horizontal radial direction of the phantom.
In an embodiment of the present application, the ultrasound transducer catheter fixing assembly further includes a horizontal moving portion connected to the traverse portion and driving the probe of the ultrasound transducer catheter to approach or move away from the phantom.
In an embodiment of the present application, the ultrasound transducer catheter fixing assembly further includes a fixing block connected to the horizontal moving part for fixing a probe of an ultrasound transducer catheter.
In an embodiment of the present application, the fixing block is provided with a plurality of via holes arranged in a vertical direction.
In an embodiment of the present application, the diameters of the plurality of vias are different.
In one embodiment of the present application, the mimetic comprises at least one of a tungsten filament target mimetic, a biological tissue mimetic made with porcine cardiovascular, and a PVA mimetic containing cellulytic cellulose.
In an embodiment of the present application, the number of the vias is three.
By adopting the technical scheme, the phantom is fixed through the phantom fixing piece, then the ultrasonic transducer catheter is fixed through the ultrasonic transducer catheter fixing assembly, and the probe of the ultrasonic transducer catheter is aligned to the phantom fixed by the phantom fixing piece, so that imaging between the probe of the ultrasonic transducer catheter and the phantom is facilitated. The bottom of the imitation body fixing piece is provided with the angle adjusting piece, and the deflection angle of the imitation body is adjusted through the angle adjusting piece, so that different included angles are formed between the imitation body and the probe of the ultrasonic transducer catheter, and the probe of the ultrasonic transducer catheter acquires images of the ultrasonic transducer in the imitation body at different deflection angles. The characteristic relation analysis between the deflection angle and the corresponding image is conveniently completed.
Drawings
The invention is described in detail below with reference to specific embodiments and the attached drawing figures, wherein:
fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the first embodiment of the present invention in another direction.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and examples. It should be understood that the following specific examples are only for illustrating the present invention and are not to be construed as limiting the present invention.
As shown in fig. 1 to fig. 2, in order to achieve the above object, the present invention provides an intravascular deflection angle testing device, which includes a phantom fixture for fixing a phantom, an ultrasound transducer catheter 20 fixing assembly for fixing an ultrasound transducer catheter 20 and positioning a probe of the ultrasound transducer catheter 20 in the phantom, and an angle adjusting member 14 disposed on the phantom fixture so that the probe forms an arbitrary angle with an axis of the phantom.
Specifically, the intravascular deflection angle testing device comprises a dummy fixing piece, an ultrasonic transducer catheter 20 fixing assembly and an angle adjusting piece 14.
The phantom fixture, the ultrasound transducer catheter 20 fixing component and the angle adjusting component 14 are made of metal materials, such as aluminum alloy materials, alloy steel materials and the like, and the components made of the metal materials have the advantages of strong supporting capability, wear resistance and the like. Of course, according to the design requirement, the plastic material can be adopted for manufacturing, and the parts made of the plastic material have the advantages of low cost, light weight, easiness in manufacturing and the like.
The imitation body fixing part is a cube, a round blind hole for placing the imitation body is formed in the cube, and the round blind hole can be conveniently attached to the appearance of the imitation body, so that the imitation body is fixed conveniently.
The ultrasonic transducer catheter 20 fixing component is used for fixing the ultrasonic transducer catheter 20, and a probe of the ultrasonic transducer catheter 20 is opposite to the center position of the phantom, so that imaging between the probe and the phantom is facilitated.
The angle adjusting part 14 is connected to the body-imitating fixing part, the angle adjusting part 14 is a manually adjusted angle adjusting part 14 with accurate scales, and the angle adjusting part 14 is adjusted manually, so that the angle control of the angle adjusting part 14 is facilitated. The angle adjusting piece 14 is connected with the body simulating fixing piece in a fixed connection mode, and the stability of connection between the angle adjusting piece 14 and the angle adjusting piece 14 can be improved by adopting the fixed connection mode. Of course, the angle adjusting member 14 and the dummy fixture may be detachably connected, such as by snapping, screwing, etc., according to the design requirement. The detachable connection is adopted, so that the angle adjusting piece 14 and the imitation fixing piece can be conveniently mounted and dismounted, and the later maintenance is facilitated.
The intravascular deflection angle testing device further comprises a bottom plate 15 arranged at the bottom, and an ultrasonic transducer catheter 20 fixing assembly and an angle adjusting piece 14 are connected to the bottom plate 15.
By adopting the technical scheme, the phantom is fixed through the phantom fixing piece, then the ultrasonic transducer catheter 20 is fixed through the ultrasonic transducer catheter 20 fixing assembly, and the probe of the ultrasonic transducer catheter 20 is aligned with the phantom fixed by the phantom fixing piece, so that imaging between the probe of the ultrasonic transducer catheter 20 and the phantom is facilitated. The bottom of the phantom fixing part is provided with the angle adjusting part 14, and the deflection angle of the phantom is adjusted through the angle adjusting part 14, so that different included angles are formed between the phantom and the probe of the ultrasonic transducer catheter 20, and the probe of the ultrasonic transducer catheter 20 acquires images of the ultrasonic transducer in the phantom at different deflection angles. The characteristic relation analysis between the deflection angle and the corresponding image is conveniently completed.
In an embodiment of the present application, the dummy fixing member includes a first fixing portion 12 connected to the angle adjusting member 14 and having a semicircular notch, and a second fixing portion 11 press-fitted on the first fixing portion 12 and having a semicircular notch, wherein the semicircular notch of the first fixing portion 12 and the semicircular notch of the second fixing portion 11 cooperate with each other to form a blind hole for fixing the dummy.
Specifically, the dummy fixture includes a first fixing portion 12 and a second fixing portion 11.
The first fixing portion 12 is connected to an angle adjusting member 14 and is rotatable under the control of the angle adjusting member 14. The first fixing portion 12 is provided with a semicircular notch, and the semicircular notch is arranged on one side far away from the angle adjusting member 14.
The second fixing portion 11 is pressed on the first fixing portion 12, a semicircular notch is formed in the second fixing portion 11, and the semicircular notch of the first fixing portion 12 and the semicircular notch of the second fixing portion 11 are matched with each other to form a blind hole for fixing the dummy.
Through dividing into first fixed part 12 and second fixed part 11 with imitative body mounting, 11 detachable connections of second fixed part are on first fixed part 12, when needs are fixed imitative body, demolish second fixed part 11 earlier, then place imitative body in the semicircle breach department of first fixed part 12, treat to place the back that finishes, then with 11 pressfittings of second fixed part on first fixed part 12 to the completion is to the fixed of imitative body, simple structure, the implementation of being convenient for.
It is conceivable that a pad 22 may be further provided between the first fixing portion 12 and the angle adjusting member 14, and the height of the first fixing portion 12 may be adjusted by providing the pad 22.
In an embodiment of the present application, the ultrasound transducer catheter 20 fixing assembly includes a lifting portion 16 for driving the probe of the ultrasound transducer catheter 20 up and down.
Specifically, the ultrasonic transducer conduit 20 fixing assembly includes a lifting portion 16 connected to the base plate 15,
one side of lift portion 16 is provided with manual knob, can adjust lift portion 16's height through manual knob to the realization is convenient for realize the counterpoint between ultrasonic transducer pipe 20's the probe and the imitative body to the regulation of ultrasonic transducer pipe 20 position in vertical direction.
In an embodiment of the present application, the ultrasound transducer catheter 20 fixing assembly further includes a traverse portion 17 connected to the lifting portion 16 for driving the probe of the ultrasound transducer catheter 20 to move along the horizontal radial direction of the phantom.
Specifically, the fixing assembly of the ultrasound transducer catheter 20 further includes a traverse portion 17, and the traverse portion 17 can drive the probe of the ultrasound transducer catheter 20 to horizontally move along the radial direction of the phantom, so as to facilitate the alignment between the probe of the ultrasound transducer catheter 20 and the phantom.
In an embodiment of the present application, the ultrasound transducer catheter 20 fixing assembly further includes a horizontal moving portion 18 connected to the traverse portion 17 and driving the probe of the ultrasound transducer catheter 20 to approach or move away from the phantom.
Specifically, the fixing assembly of the ultrasound transducer catheter 20 further comprises a horizontal moving part 18 which enables the probe of the ultrasound transducer catheter 20 to be close to or far away from the dummy, the distance between the probe of the ultrasound transducer catheter 20 and the dummy can be adjusted through the horizontal moving part 18, and the flexibility of the intravascular deflection angle testing device is improved.
In an embodiment of the present application, the ultrasound transducer catheter 20 fixing assembly further includes a fixing block 19 connected to the horizontal moving part 18 for fixing a probe of the ultrasound transducer catheter 20.
Specifically, the fixing assembly for the ultrasound transducer catheter 20 further comprises a fixing block 19 for fixing the probe of the ultrasound transducer catheter 20, the fixing block 19 is fixedly connected to the horizontal moving portion 18, and the fixing connection can improve the stability between the fixing block 19 and the horizontal moving portion 18.
By adopting the technical scheme, the fixing block 19 is arranged on the horizontal moving part 18, so that the imitation body is fixed conveniently, and the efficiency of fixing the imitation body is improved. The intravascular deflection angle testing device is convenient to use.
In an embodiment of the present application, the fixing block 19 is provided with a plurality of through holes 21 arranged in a vertical direction.
Specifically, the fixed block 19 is provided with a plurality of through holes 21 arranged in the vertical direction, and the axial direction of the through holes 21 is parallel to the axial direction of the full holes.
Through setting up a plurality of via holes 21 on fixed block 19, can realize alternate the probe of a plurality of ultrasonic transducer pipes 20 simultaneously, realize the backup of the probe of a plurality of ultrasonic transducer pipes 20, improved the suitability of endovascular deflection angle testing arrangement.
In an embodiment of the present application, the diameters of the vias 21 are different.
Specifically, the diameters of the plurality of through holes 21 are different, so that the adaptation to probes of ultrasonic transducer catheters 20 with different diameters can be realized, and the compatibility of the intravascular deflection angle testing device to the probes of different ultrasonic transducer catheters 20 is improved.
In one embodiment of the present application, the mimetic comprises at least one of a tungsten filament target mimetic, a biological tissue mimetic made with porcine cardiovascular, and a PVA mimetic containing cellulytic cellulose.
In an embodiment of the present application, the number of the vias 21 is three.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The intravascular deflection angle testing device is characterized by comprising a dummy fixing piece used for fixing a dummy, an ultrasonic transducer catheter fixing assembly used for fixing an ultrasonic transducer catheter and enabling a probe of the ultrasonic transducer catheter to be located in the dummy, and an angle adjusting piece arranged on the dummy fixing piece and enabling the probe and the axis of the dummy to form any angle.
2. The intravascular deflection angle testing device of claim 1, wherein the dummy fixture includes a first fixture portion connected to the angle adjustment member and having a semicircular notch, and a second fixture portion press-fitted onto the first fixture portion and having a semicircular notch, wherein the semicircular notch of the first fixture portion and the semicircular notch of the second fixture portion cooperate to form a blind hole for fixing the dummy.
3. The intravascular deflection angle testing device of claim 1, wherein the ultrasound transducer catheter securement assembly includes a lift for driving a probe of the ultrasound transducer catheter up and down.
4. The intravascular deflection angle testing device of claim 3, wherein the ultrasound transducer catheter securement assembly further includes a traversing portion coupled to the lifting portion for driving a probe of an ultrasound transducer catheter to move along the horizontal radial direction of the phantom.
5. The intravascular deflection angle testing device of claim 4, wherein the ultrasound transducer catheter securement assembly further includes a horizontally movable portion coupled to the traversing portion and driving a probe of the ultrasound transducer catheter closer to or away from the phantom.
6. The intravascular deflection angle testing device of claim 5, wherein the ultrasound transducer catheter securement assembly further comprises a securement block coupled to the horizontally movable portion for securing a probe of an ultrasound transducer catheter.
7. The intravascular deflection angle testing device of claim 6, wherein the fixing block is provided with a plurality of through holes arranged along a vertical direction.
8. The intravascular deflection angle testing device of claim 7, wherein the plurality of vias are all of different diameters.
9. The intravascular deflection angle testing device of claim 1, wherein the mimic comprises at least one of a tungsten filament target mimic, a biological tissue mimic made of porcine cardiovascular, and a PVA mimic containing cellullose.
10. The intravascular deflection angle testing device of claim 7, wherein the number of vias is three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111633212.XA CN114176642B (en) | 2021-12-29 | 2021-12-29 | Intravascular deflection angle testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111633212.XA CN114176642B (en) | 2021-12-29 | 2021-12-29 | Intravascular deflection angle testing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114176642A true CN114176642A (en) | 2022-03-15 |
| CN114176642B CN114176642B (en) | 2022-08-12 |
Family
ID=80606371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111633212.XA Active CN114176642B (en) | 2021-12-29 | 2021-12-29 | Intravascular deflection angle testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114176642B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101106589B1 (en) * | 2010-05-14 | 2016-06-22 | 국방과학연구소 | The Launcher of Parachute Assembly that Can Control Fire Angle Degree and the Testing Technique that Deploy Parachute |
| WO2018043788A1 (en) * | 2016-09-05 | 2018-03-08 | (주)품질안전기술원 | Flexible variable angle wedge for ultrasonic wave inspection, and ultrasonic guided wave inspection system using same |
| CN209043602U (en) * | 2018-12-07 | 2019-06-28 | 中国航发沈阳发动机研究所 | The test probe of angle adjustable |
| US20200241041A1 (en) * | 2019-01-29 | 2020-07-30 | Kuan-Hung Chen | Deflecting Device for A Probe |
| WO2020181388A1 (en) * | 2019-03-13 | 2020-09-17 | Exact Imaging Inc. | Needle guide for an angled endocavity transducer |
| CN113532857A (en) * | 2021-07-29 | 2021-10-22 | 山东凯美瑞轴承科技有限公司 | Self-aligning rolling bearing performance test device and rigidity test method |
| CN113820399A (en) * | 2021-09-23 | 2021-12-21 | 鹰视(廊坊)科技有限公司 | Probe adjusting device and ultrasonic detection device |
-
2021
- 2021-12-29 CN CN202111633212.XA patent/CN114176642B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101106589B1 (en) * | 2010-05-14 | 2016-06-22 | 국방과학연구소 | The Launcher of Parachute Assembly that Can Control Fire Angle Degree and the Testing Technique that Deploy Parachute |
| WO2018043788A1 (en) * | 2016-09-05 | 2018-03-08 | (주)품질안전기술원 | Flexible variable angle wedge for ultrasonic wave inspection, and ultrasonic guided wave inspection system using same |
| CN209043602U (en) * | 2018-12-07 | 2019-06-28 | 中国航发沈阳发动机研究所 | The test probe of angle adjustable |
| US20200241041A1 (en) * | 2019-01-29 | 2020-07-30 | Kuan-Hung Chen | Deflecting Device for A Probe |
| WO2020181388A1 (en) * | 2019-03-13 | 2020-09-17 | Exact Imaging Inc. | Needle guide for an angled endocavity transducer |
| CN113532857A (en) * | 2021-07-29 | 2021-10-22 | 山东凯美瑞轴承科技有限公司 | Self-aligning rolling bearing performance test device and rigidity test method |
| CN113820399A (en) * | 2021-09-23 | 2021-12-21 | 鹰视(廊坊)科技有限公司 | Probe adjusting device and ultrasonic detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114176642B (en) | 2022-08-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ANGELSEN et al. | Transcutaneous measurement of blood flow velocity in the human aorta | |
| Rees et al. | Coarctation of the aorta: MR imaging in late postoperative assessment. | |
| US20030055336A1 (en) | Method and apparatus for measuring volume flow and area for a dynamic orifice | |
| JP3303056B2 (en) | Pressure waveform monitoring device | |
| Rackley | Quantitative evaluation of left ventricular function by radiographic techniques. | |
| Xu et al. | Intravascular ultrasound assessment of regional aortic wall stiffness, distensibility, and compliance in patients with coarctation of the aorta | |
| WO2017097074A1 (en) | Method for calculating blood flow volume of blood vessel per unit time and blood flow velocity | |
| CN108472012B (en) | Multi-site continuous ultrasound flow measurement for hemodynamic management | |
| JPS60185538A (en) | Calibration method and apparatus of biopsy apparatus for ultrasonic imaging apparatus | |
| US20070060818A1 (en) | Blood-vessel-endothelium-function inspecting apparatus | |
| Chirillo et al. | Assessment of internal mammary artery and saphenous vein graft patency and flow reserve using transthoracic Doppler echocardiography | |
| Ackroyd et al. | Duplex scanning of the portal vein and portasystemic shunts | |
| CN114176642B (en) | Intravascular deflection angle testing device | |
| JP2012061131A (en) | Fluid pressure measuring apparatus, fluid pressure measuring method, blood pressure measuring apparatus, and blood pressure measuring method | |
| JPH0417843A (en) | Ultrasonic diagnostic apparatus | |
| Zhou et al. | Velocity distributions in the left ventricular outflow tract and the aortic anulus measured with Doppler colour flow mapping in normal subjects | |
| CN204839442U (en) | Look net film positioning device based on eye ground imaging system | |
| Schober et al. | Transesophageal Doppler devices: a technical review | |
| WO2010147055A1 (en) | Ultrasonic image pickup apparatus and ultrasonic image pickup method | |
| Beard et al. | A Doppler flowmeter for use in theatre | |
| Clifford et al. | The role of pulsatility index in the clinical assessment of lower limb ischaemia | |
| CN113476080A (en) | Ejection fraction calibration method based on ultrasonic medical image and special equipment | |
| Bude et al. | Stenosis of the main artery supplying an organ: effect of end‐organ vascular compliance on the poststenotic peak systolic velocity. | |
| REDWOOD et al. | Design and function of a mechanical assembly for recording echocardiograms during upright exercise | |
| Keagy et al. | A removable extraluminal Doppler probe for continuous monitoring of changes in cardiac output. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |