DE704186C - Device for determining relationships between at least two pulse curves, in particular for measuring the pulse wave speed using a single measuring mechanism - Google Patents
Device for determining relationships between at least two pulse curves, in particular for measuring the pulse wave speed using a single measuring mechanismInfo
- Publication number
- DE704186C DE704186C DEE52328D DEE0052328D DE704186C DE 704186 C DE704186 C DE 704186C DE E52328 D DEE52328 D DE E52328D DE E0052328 D DEE0052328 D DE E0052328D DE 704186 C DE704186 C DE 704186C
- Authority
- DE
- Germany
- Prior art keywords
- pulse
- measuring
- curves
- pulse wave
- wave speed
- 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
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F10/00—Apparatus for measuring unknown time intervals by electric means
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Hematology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Cardiology (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physiology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Description
Gerät zur Bestimmung von Beziehungen zwischen wenigstens zwei Pulskurven, insbesondere zur Messung der Pulswellengeschwindigkeit unter Verwendung eines einzigen Meßwerkes Zur Ermittlung des sogenannten Schlagvolumens des Herzens wird neben anderen Größen die Pulswellengeschwindigkeit be stimmt.Device for determining relationships between at least two pulse curves, especially for measuring the pulse wave velocity using a single Measuring mechanism To determine the so-called stroke volume of the heart is besides others The pulse wave velocity is determined by quantities.
Diese Bestimmung wurde bisher so ge macht, daß Pulskurven von zwei in verschiedenen Abständen vom Herzen gelegenen Ar terienpunkten gleichzeitig auf demselben Papierstreifen registriert wurden. This determination has so far been made so that pulse curves of two artery points located at different distances from the heart at the same time registered on the same strip of paper.
Die Registrierung wird oft mit Hilfe von zwei piezoelektrischen Gebern gemacht, deren Ausgangsspannungen in je einem Verstärker verstärkt werden, um dann zu zwei Meßschleifen geleitet zu werden. Eine Zeitschrei bung wird gleichzeitig mitregistriert. Fig. 1 zeigt einen Papierstreifen mit zwei solchen Pulskurven und Zeitschreibung. The registration is often done with the help of two piezoelectric sensors made whose output voltages are each amplified in an amplifier to then to be routed to two measuring loops. A time record is made at the same time registered. Fig. 1 shows a paper strip with two such pulse curves and Time recording.
Die Zeitdifferenz T zwischen zwei einander entsprechenden Punkten der beiden Kurven, z. B. den beiden Anfangspunkten 1 und 2, nennt man Pulsverzögerung. Die Pulsverzöge. rung zeigt, wie lange Zeit die Pulswelle braucht, um einen Weg zurückzulegen, der gleich der Differenz zwischen den Abständen der beiden Arterienpunkte von dem Her zen ist. The time difference T between two corresponding points of the two curves, e.g. B. the two starting points 1 and 2 are called pulse delay. The pulse delays. tion shows how long it takes the pulse wave to travel which is equal to the difference between the distances between the two arterial points from the heart is.
Die Pulsverzögerung wird auf der Kurve gemessen und die Differenz der Abstände der beiden Arterienpunkte durch sie dividiert. The pulse delay is measured on the curve and the difference the distances between the two arterial points divided by them.
Der Quotient gibt die Pulswellengeschwindigkeit an.The quotient indicates the pulse wave speed.
Das Merkmal des erfindungsgemäßen Ge rätes besteht darin, daß wenigstens zwei elektnsche vorzugsweise piezoelektrische Pulsgeber in ihrem Ausgang unmittelbar oder über einen gemeinsamen bzw. über getrennte Verstärker mit entgegengesetzter Polung verbunden sind und an ein gemeinsames Meß werk angeschaltet sind. The feature of the Ge inventive device is that at least two electrical, preferably piezoelectric, pulse generators in your Output directly or via a common or separate amplifier with opposite polarity are connected and connected to a common measuring unit are.
Wenn mit dieser Anordnung eine Registrierung des Pulses an zwei Arterienpunkten in ähnlicher Weise, wie oben beschrieben, vorgenommen wird, erhält man eine Kurve etwa gemäß Fig. 2, wobei der Zeitabstand zwischen den beiden Punkten 3 und 4 die Pulsverzögerung angibt. Hieraus kann in oben angegeb ener Weise die P ulswellengeschwind igkeit berechnet werden. Mit diesem Gerät ist es also gelungen, mit Hilfe nur eines Verstärkers und eines Meßwerkes die Pulswellengeschwindigkeit zu bestimmen. If with this arrangement a registration of the pulse at two arterial points in a manner similar to that described above, a curve is obtained approximately according to FIG. 2, the time interval between the two points 3 and 4 being the Indicating pulse delay. The pulse wave speed can be derived from this in the manner indicated above ity can be calculated. So, with this device, we succeeded with the help of just one Amplifier and a measuring mechanism to determine the pulse wave speed.
Fig. 3 zeigt ein Ausführungsbeispiel des Gerätes. Die beiden Geber 5 und 6 sind über hochohmige Potentiometer 7 .und 8 zur unabhängigen Regelung der Empfindlichkeit an den Eingang des Verstärkers 9 geschaltet. Fig. 3 shows an embodiment of the device. The two donors 5 and 6 are via high-resistance potentiometers 7 and 8 for independent control of the Sensitivity switched to the input of amplifier 9.
In der Zeichnung ist eine Reihenschaltung dargestellt, jedoch kann eine Parallelschaltung mit ungleichnamigen Polen ebensogut verwendet werden.In the drawing, a series connection is shown, but can a parallel connection with unlike poles can be used just as well.
Die beiden Geber können auch über zwei getrennte Verstärker die gemeinsame Oszillographenmeßschleife 14 speisen, oder es können getrennte Vorstufen und eine gemeinsame Ausgangsstufe verwendet werden. The two encoders can also share the common via two separate amplifiers Oszillographenmeßschleife 14 feed, or there can be separate preliminary stages and one common output stage can be used.
Um die piezoelektrischen Geber an die zu registrierenden Frequenzen anzupassen, sind zusätzliche Kapazitäten 10 und 1l vorgesehen. To the piezoelectric transmitter to the frequencies to be registered adapt, additional capacities 10 and 1l are provided.
Mit den Kurzschlußschaltern 12 und 13 können beide Geber oder es kann auch nur einer von den Gebern abgestellt werden.With the short-circuit switches 12 and 13, both transmitters or it can even one of the donors can be turned off.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEE52328D DE704186C (en) | 1939-03-14 | 1939-03-14 | Device for determining relationships between at least two pulse curves, in particular for measuring the pulse wave speed using a single measuring mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEE52328D DE704186C (en) | 1939-03-14 | 1939-03-14 | Device for determining relationships between at least two pulse curves, in particular for measuring the pulse wave speed using a single measuring mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE704186C true DE704186C (en) | 1941-03-25 |
Family
ID=7081567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEE52328D Expired DE704186C (en) | 1939-03-14 | 1939-03-14 | Device for determining relationships between at least two pulse curves, in particular for measuring the pulse wave speed using a single measuring mechanism |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE704186C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE824823C (en) * | 1946-03-08 | 1951-12-13 | Bosch & Speidel | Device for examining vascular damage |
| US4066066A (en) * | 1975-07-01 | 1978-01-03 | Hee Soo Paek | Electronic pulse feeling device for practice of diagnosis in oriental medicine |
| EP1060705A1 (en) * | 1999-06-16 | 2000-12-20 | Global Link Finance | Method for determination of the pulse wave velocity and estimation of aortic pressure |
-
1939
- 1939-03-14 DE DEE52328D patent/DE704186C/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE824823C (en) * | 1946-03-08 | 1951-12-13 | Bosch & Speidel | Device for examining vascular damage |
| US4066066A (en) * | 1975-07-01 | 1978-01-03 | Hee Soo Paek | Electronic pulse feeling device for practice of diagnosis in oriental medicine |
| 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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