DE845379C - Device for recording the pulse wave speed - Google Patents
Device for recording the pulse wave speedInfo
- Publication number
- DE845379C DE845379C DE1948P0003299 DEP0003299D DE845379C DE 845379 C DE845379 C DE 845379C DE 1948P0003299 DE1948P0003299 DE 1948P0003299 DE P0003299 D DEP0003299 D DE P0003299D DE 845379 C DE845379 C DE 845379C
- Authority
- DE
- Germany
- Prior art keywords
- counter
- pulse wave
- pulse
- wave speed
- electrical
- 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.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/026—Measuring blood flow
- A61B5/0285—Measuring or recording phase velocity of blood waves
Description
Für die ärztliche Diagnose ist es vielfach von großer Wichtigkeit, die sog. Pulswellengeschwindigkeit zu ermitteln. Zu diesem Zweck wird nach bekanntem Verfahren die durchlaufende Puiswelle an zwei gewünschten Stellen des Körpers mittels geeigneter Geber, z. B. Frankscher Kapseln, abgenommen und mittels einer Registriervorrichtung aufgezeichnet. Man mißt dann die Entfernung zwischen den beiden Abnahmestellen und die Zeitdifferenz der aufgezeichneten Vorgänge und errecihnet aus den ermittelten Werten die gesuchte Geschwindigkeit. For the medical diagnosis it is often of great importance to determine the so-called pulse wave velocity. For this purpose it is known Move the continuous Puiswelle at two desired points on the body by means of suitable encoder, e.g. B. Frankscher capsules, removed and by means of a registration device recorded. The distance between the two tapping points and is then measured the time difference between the recorded processes and obtained from the determined Values the speed you are looking for.
Es erweist sich, daß dieser Weg zur Bestimmung der Pulswellengeschwindigkeit für den Arzt verhältnismäßig umständlich und zeitraubend ist. It turns out that this way of determining the pulse wave velocity is relatively cumbersome and time-consuming for the doctor.
Auch sind hierbei Reohenfehler zu besorgen. Die Aufgabe der Erfindung ist es deshalb, dem Arzt ein Mittel an die Hand zu geben, das es ihm erlaubt, die Zeit zwischen dem Durchlaufen der Pulswelle an den beiden Ahnahmestellen bzw. die Gesc.hwindigkeit der Welle an Meßinstrumenten un mittelbar und exakt abzulesen.There are also misalignments to worry about. The object of the invention it is therefore to give the doctor a means at hand that will allow him to do the Time between the passage of the pulse wave at the two receiving points or the The speed of the shaft can be read directly and precisely on measuring instruments.
Die erfindungsgemäße Aufgabe wird dadurch gelöst, daß man aus den durch Umwandlung der Pulswellen gewonnenen Spannungen zwecks genauer Ermittlung der Zeitdifferenz mittels Differentiation zwei scharfe Impulse erzeugt. The object of the invention is achieved in that from the voltages obtained by converting the pulse waves for the purpose of precise determination the time difference generates two sharp impulses by means of differentiation.
Zur Verwirklichung kann man sich einer Einrichtung ähnlich derjenigen bedienen, wie sie gelegentlich zur Messung der Geschwindigkeit von Schallwellen benutzt werden und bei welcher der zeitliche Abstand zwischen zwei Impulsen mittels eines Zählwerks gemessen wird. To achieve this one can look to a facility similar to the one operate as they are occasionally used to measure the speed of sound waves are used and at which the time interval between two pulses by means of a counter is measured.
Zur Erläuterung einer solchen Einrichtung sei darauf verwiesen, daß von einem Quarzgenerator sinusförmige Spannungen erzeugt werden, die eine Kippschaltung steuern. Die letztere besteht aus mehreren Stufen, wobei in jeder Stufe eine Frequenzhalbierung stattfindet, so daß in den letzten Stufen mit normalen mechanischen Zählwerk gezählt werden kann, wogegen in den ersten Stufen Meßinstrumente, die jeweils um einen Teilstrich weiter zeigen, die Zahl der Schwingungen mit hoher Genauigkeit abzulesen gestatten. To explain such a device, it should be noted that Sinusoidal voltages are generated by a quartz generator using a trigger circuit steer. The latter consists of several stages, with a frequency halving in each stage takes place so that in the last stages counted with normal mechanical counter can be, whereas in the first stages measuring instruments, each by a division further show, allow the number of oscillations to be read with high accuracy.
Die Freigabe der quarzgesteuerten Zähleinrichtung erfol.gt durch den ersten Impuls, die Sperrung durch den zweiten. The quartz-controlled counter is released by the first impulse, the blocking by the second.
Indem man nach der Erfindung die beiden von der Pulswelle gesteuerten Impulse auf ein solches Zählwerk gibt, welches den Zeitabstand zwischen den Impulsen abzulesen gestattet, kann man einen weiteren Fortschritt dadurch erzielen, daß man die Steuerspannung von einem Generator großer Cz nauigkeit, aber vefänderliohen Frequenzen abnimmt und die Frequenz der Entfernung der Meßstellen am Körper des Patienten derart anpaßt, daß man unmittelbar auch die Geschwindigkeit der Pulswelle ablesen kann. By having the two controlled by the pulse wave according to the invention It gives impulses to such a counter, which determines the time interval between the impulses Permitted to read, one can make further progress by having the control voltage from a generator with great accuracy, but changing Frequencies decreases and the frequency of the distance of the measuring points on the body of the Adjusts the patient in such a way that the speed of the pulse wave is also immediately available can read.
Der Erfindungsgedanke ist in der Zeichnung beispielhaft erläutert. Fig. 1 stellt den Verlauf zweier vom Puls abgenommener Sclhwingunjgen I und 2 dar, deren Beginn, wie man erkennt, nur schwer meßbar ist. Dagegen stellen die erfinldiungsgemäß durch Differentiation daraus gewonnenen Impulse3 und 4 gemäß Fig. 2 zeitlich genau definierte Augenblicke dar. The idea of the invention is exemplified in the drawing. Fig. 1 shows the course of two oscillations I and 2 taken from the pulse, the beginning of which, as can be seen, is difficult to measure. On the other hand, according to the invention Pulses 3 and 4 obtained therefrom by differentiation according to FIG. 2 are precisely timed defined moments.
In Fig. 3 ist eine mögliche Anordnung zur Verwirklichung der Erfindung im Prinzip dargestellt. In Fig. 3 is a possible arrangement for realizing the invention shown in principle.
Am Arm 5 des Patienten wird der Puls an Stellen 6 und 7 mittels dser Gel>er 8 und 9 abgenommen. Über Differenzierglieder Io und ii werden die Impulse auf Verstärker I2 und I3 gegeben, die die Freigabe und Spannung des Zählwerks 14 steuern. An den Instrumenten 15 und I6 kann die Zeit bzw. die Gesch\vindigkeit unmittelbar abgelesen werden.On the patient's arm 5, the pulse is measured at points 6 and 7 by means of dser Gel> er 8 and 9 removed. Via differentiators Io and ii, the impulses given to amplifiers I2 and I3, which enable and voltage the counter 14 steer. The time or the speed can be measured directly on instruments 15 and 16 can be read.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1948P0003299 DE845379C (en) | 1948-10-02 | 1948-10-02 | Device for recording the pulse wave speed |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1948P0003299 DE845379C (en) | 1948-10-02 | 1948-10-02 | Device for recording the pulse wave speed |
Publications (1)
Publication Number | Publication Date |
---|---|
DE845379C true DE845379C (en) | 1952-07-31 |
Family
ID=579965
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1948P0003299 Expired DE845379C (en) | 1948-10-02 | 1948-10-02 | Device for recording the pulse wave speed |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE845379C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1039947B (en) * | 1953-08-12 | 1958-09-25 | Dr Franz Fenyves | Method for measuring the time difference between the occurrence of two electrically detectable events |
EP1060705A1 (en) * | 1999-06-16 | 2000-12-20 | Global Link Finance | Method for determination of the pulse wave velocity and estimation of aortic pressure |
-
1948
- 1948-10-02 DE DE1948P0003299 patent/DE845379C/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1039947B (en) * | 1953-08-12 | 1958-09-25 | Dr Franz Fenyves | Method for measuring the time difference between the occurrence of two electrically detectable events |
EP1060705A1 (en) * | 1999-06-16 | 2000-12-20 | Global Link Finance | Method for determination of the pulse wave velocity and estimation of aortic pressure |
FR2794961A1 (en) * | 1999-06-16 | 2000-12-22 | Global Link Finance | PROCESS FOR DETERMINING THE TIME OFFSET BETWEEN THE INSTANTS OF PASSING OF A SAME PULSE WAVE IN TWO DISTINCT MEASUREMENT POINTS OF AN ARTERIAL NETWORK OF A LIVING BEING AND ESTIMATING ITS AORTIC PRESSURE |
US6511436B1 (en) | 1999-06-16 | 2003-01-28 | Roland Asmar | Device for assessing cardiovascular function, physiological condition, and method thereof |
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