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 Title: |
US5135003:
Automatic sphygmomanometer
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Souma, Takahiro; Kanagawa, Japan
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| Assignee: |
Terumo Kabushiki Kaisha, Tokyo, Japan
other patents from TERUMO KABUSHIKI KAISHA (TERUMO CORPORATION) (569190) (approx. 767)
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| Published / Filed: |
1992-08-04
/ 1990-02-09
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| Application Number: |
US1990000460110
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| IPC Code: |
Advanced:
A61B 5/0215;
A61B 5/022;
Core:
more...
IPC-7:
A61B 5/02;
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| U.S. Class: |
Current:
600/493;
600/495;
Original:
128/680;
128/682;
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| Field of Search: |
128/672,677,680-685,687,691
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| Priority Number: |
| 1987-08-11 |
JP1987000199155 |
| 1987-08-11 |
JP1987000199156 |
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| Abstract: |
An automatic sphygmomanometer for measuring the blood pressure of a subject based on Korotkoff sounds is adapted to analyze the transition of the pulse signal amplitude of a detected cuff pressure signal, set a range in which systolic blood pressure of the subject is capable of residing and a range in which diastolic blood pressure of the subject is capable of residing, and evaluate, based on appearance and disappearance of the Korotkoff sounds, whether the blood pressures that have determined reside in the set ranges. Preferably, the sphygmomanometer is provided with two amplifying/filtering circuits and two discriminating circuits using threshold values suited to each of the frequency characteristics of Korotkoff sound signals in the vicinity of the systolic and diastolic blood pressures. This improves the precision with which each blood pressure is determined. Preferably, the amplified/filtered signals and threshold signals of the two sets of circuits are capable of being externally extracted, and these signals are capable of being externally adjusted so that the electronic sphygmomanometer may be calibrated by making joint use of an auscultation method.
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| Attorney, Agent or Firm: |
Staas & Halsey ;
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| Primary / Asst. Examiners: |
Howell, Kyle L.; Nasser, Jr., Robert L.
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| INPADOC Legal Status: |
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| Designated Country: |
BE DE FR GB IT NL SE EP JP US
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| Family: |
Show 8 known family members
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First Claim:
Show all 9 claims |
What is claimed is:
1. An automatic sphygmomanometer for measuring blood pressure of a subject based on Korotkoff sound signals generated during pressurization using a cuff, comprising:
- cuff pressure detecting means for detecting cuff pressure and outputting a cuff pressure signal including a pulse signal component;
- Korotkoff sound detecting means for detecting Korotkoff sounds and outputting Korotkoff sound signals;
- Korotkoff sound signal processing means for performing amplifying and filtering processing based on the Korotkoff sound signals to produce processed Korotkoff sound signals and for comparing the processed Korotkoff sound signals with a predetermined threshold value to obtain extracted Korotkoff sound signals which exceed the predetermined threshold value;
- blood pressure determining means for determining systolic blood pressure and diastolic blood pressure based on the extracted Korotkoff sound signals;
- range setting means for setting ranges based on a transition of the pulse signal component of the cuff pressure signal, the ranges including a range in which systolic blood pressure of the subject is capable of residing and a range in which diastolic blood pressure of the subject is capable of residing;
- evaluating means for providing an indication of whether the systolic and diastolic blood pressures determined by said blood pressure determining means reside in the ranges set by said range setting means; and
- display means for displaying information indicative of the systolic and diastolic blood pressures determined by said blood pressure determining means and the indication made by said evaluating means.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| PCT Number: |
PCT/JP88/00801
WO8901310
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| PCT Pub./Filed Dates: |
1989-02-23 / 1988-08-11
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| § 371 / 102(e) Dates: |
1990-02-09 / 1990-02-09
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| Forward References: |
Show 33 U.S. patent(s) that reference this one
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