US3302638A - Mercury sphygmomanometers - Google Patents

Mercury sphygmomanometers Download PDF

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Publication number
US3302638A
US3302638A US310438A US31043863A US3302638A US 3302638 A US3302638 A US 3302638A US 310438 A US310438 A US 310438A US 31043863 A US31043863 A US 31043863A US 3302638 A US3302638 A US 3302638A
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US
United States
Prior art keywords
tube
mercury
compression chamber
housing
inlet
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 - Lifetime
Application number
US310438A
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English (en)
Inventor
Parera Pedro Pere
Llaurado David Fabra
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Individual
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Individual
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Filing date
Publication date
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Publication of US3302638A publication Critical patent/US3302638A/en
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    • 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 for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
    • A61B5/021—Measuring pressure in heart or blood vessels
    • A61B5/022—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
    • A61B5/023—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers the pressure transducers comprising a liquid column
    • 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 for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
    • A61B5/021—Measuring pressure in heart or blood vessels

Definitions

  • the present invention refers to improvements in or relating to mercury sphygmomanometers, and more particularly to an apparatus for measuring arterial tension.
  • An important object of the present invention is to provide a sphygmomanometer of such dimensions as to be readily carried on the physicians person vand which in use assures an easy and accurate reading.
  • the invention comprises a housing constituting a compression chamber having in its base a mercury supply, a measuring tube located within the housing and tapering upwardly from its lower end which is in communication with the mercury supply, With the upper end of the tube being provided with a semi-filter through which the tube communicates with the interior of the compression chamber, an inlet for the housing in communication with the mercury supply and with a compressor armlet via a suitable connection such las a hose, a semi-filter located within the inlet, ia further inlet in the housing communicating with the interior of the tube at a position slightly above the zero level of the mercury column and a semi-filter positioned in the latter inlet with such latter inlet serving to equalize the atmospheric pressure with that of the interior of the tube and the compression chamber for obtaining absolute precision in the measurement ⁇ of the arterial tension.
  • FIGURE 1 is a vertical sectional view of an apparatus embodying the present invention.
  • FIGURE 2 is an elevational view on a reduced scale of the apparatus shown in FIGURE 1.
  • FIGURES 1 and 2 show a manometer upwardly tapered tube 15 which d-ue to its form regularizes the manometric scale, reducing it and making it proportional.
  • the lower part of the tube 15 is introduced in a syphon fashion within la mercury receptacle 16.
  • the upper part of the tube 15 carries a semi-filter 17 which functions as a stopper for the tube.
  • a housing 18 surrounds the tube and forms the compression chamber which embraces the full length of the tube. Hence, the chamber is of the same length as the tube or centimeters, thus reducing the size of the apparatus to a minimum.
  • a cylindrical lens or prism 19 having Ia scale thereon is placed at the front or inside the compression chamber -to facilitate the reading of the mercury column.
  • the base of the housing serves as a mercury receptacle 20 which is ⁇ completely filled without a single air bubble and which only communicates with 4the exterior through an inlet 21 in which a semilter 22 is placed to avoid spilling of the mercury exteriorly of the apparatus.
  • a fitting 23 is provided for the inlet 21 and the tting is in communication with a compressor armlet (not shown) by way of a flexible conduit such asa tube associated with the fitting.
  • the mercury rises in the tapered tube 15 indicating the pressure and forces the air situated -above the mercury column through the semiiilter 17 towards the compression chamber 18 in which the air possesses similar characteristics to those of ambient conditions due to the fact that prior to using the apparatus, the interior of the chamber was placed in communication with the ambient atmosphere through a semifilter 24 the mouthpiece of which is obstructed by the mercury when the latter rises in the manometric tube 15.
  • the dimensions of the casing holding the various components of the apparatus are approximately x 112 X 3() mm.
  • the height obtained by the mercury column at the same exterior pressure will 'be in inverse relation to the section of the mercury column.
  • the graduation of the column will be closer the higher the point of measurement or, when approaching 300 mm. of mercury, there can ⁇ be obtained a completely regularly marked scale.
  • An ,apparatus for measuring ⁇ arterial tension comprising a housing constituting a compression cham-ber and having upper and lower ends, a mercury supply in the lower end of the housing, an upwardly tapering tube having upper and Ilower ends within the compression chamber communicating at its lower end with the mercury supply and at its upper end to the compression chamber, and a semi-filter yclosure means communicating exteriorly of the housing and with the interior of the tube in proximity to the zero level of the mercury column in the tube.
  • the apparatus for measuring arterial tension as References Cited by the Examiner in claim 1 in which said housing and tube are UNITED STATES PATENTS 3.
  • the apparatus for measuring arterial tension as 1671785 9/1875 Pond 128 ⁇ 2-05 claimed in claim 1 including a semilter c-losure means 5 1,245,559 11/1917 Booth 12S-'205 X for the upper end of the tube constituting a fluid im- 21669125 2/1954 Hesse 73-402 pervious connection between the compression chamber FOREIGN PATENTS and the interior ⁇ of the tube.
  • the apparatus for measuring larterial tension as claimed in claim 3 including an inlet communicating With 10 RICHARD A G AUDET prima Examiner the mercury supply and With a compression armlet, rery spectively, and a semi-filter located in said inlet. SIMON BRODEKEXHMIIQI'.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Cardiology (AREA)
  • Vascular Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Surgery (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Physiology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Ophthalmology & Optometry (AREA)
  • Measuring Fluid Pressure (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
US310438A 1962-09-24 1963-09-20 Mercury sphygmomanometers Expired - Lifetime US3302638A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES28102262 1962-09-24

Publications (1)

Publication Number Publication Date
US3302638A true US3302638A (en) 1967-02-07

Family

ID=8431828

Family Applications (1)

Application Number Title Priority Date Filing Date
US310438A Expired - Lifetime US3302638A (en) 1962-09-24 1963-09-20 Mercury sphygmomanometers

Country Status (7)

Country Link
US (1) US3302638A (OSRAM)
BE (1) BE637780A (OSRAM)
CH (1) CH398872A (OSRAM)
DK (1) DK106359C (OSRAM)
FR (1) FR1370978A (OSRAM)
GB (1) GB1054326A (OSRAM)
NL (1) NL298241A (OSRAM)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US167785A (en) * 1875-09-14 Improvement in sphygmoscopes
US1245559A (en) * 1917-03-02 1917-11-06 Thomas Smith Booth Liquid micrometer-indicator.
US2669125A (en) * 1952-09-09 1954-02-16 Hesse Holger Closed mercury manometer
FR1192165A (fr) * 1957-03-08 1959-10-23 Sphygmomanomètre à mercure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US167785A (en) * 1875-09-14 Improvement in sphygmoscopes
US1245559A (en) * 1917-03-02 1917-11-06 Thomas Smith Booth Liquid micrometer-indicator.
US2669125A (en) * 1952-09-09 1954-02-16 Hesse Holger Closed mercury manometer
FR1192165A (fr) * 1957-03-08 1959-10-23 Sphygmomanomètre à mercure

Also Published As

Publication number Publication date
CH398872A (fr) 1966-03-15
DK106359C (da) 1967-01-23
NL298241A (OSRAM)
FR1370978A (fr) 1964-08-28
BE637780A (OSRAM)
GB1054326A (OSRAM)

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