Stactometric apparatus

• US 4,286,590 A
• Filed: 07/19/1979
• Issued: 09/01/1981
• Est. Priority Date: 07/24/1978
• Status: Expired due to Term

• Current Assignee: Terumo Corporation
• Original Assignee: Terumo Corporation
• Inventors: Murase, Masakazu
• Primary Examiner(s): Hart, Charles N.
• Assistant Examiner(s): Sadowski, David R.
• Application Number:
  US06/058,932
• Time in Patent Office: 775 Days
• Field of Search: 128/214 E, 128/295, 128/771, 128/DIG. 13, 222/52, 222/55, 222/63, 222/76, 137/486, 137/487.5, 340/606, 340/609, 235/92 FL
• US Class Current: 604/30
• CPC Class Codes: A61B 5/20 for measuring urological functions restricted to the evaluation of the urinary system A61B5/4375 takes precedence
• CPC Class Codes: A61B 5/201 Assessing renal or kidney functions
• CPC Class Codes: A61M 1/00 Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems catheters A61M25/00; tube connectors, tube couplings, valves or branch units specially adapted for medical use A61M39/00; devices for taking samples of blood A61B5/15; filters implantable into blood vessels A61F2/01
• CPC Class Codes: A61M 5/1689 Drip counters
• CPC Class Codes: G01F 3/00 Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow measuring a proportion of the volume flow G01F5/00
• CPC Class Codes: Y10S 128/13 Infusion monitoring

Abstract

A counter counts the time intervals of falling instilled drops in response to a signal issued each time a falling instilled drop is detected. A memory is supplied with data representing the quantities of a falling instilled drop corresponding to the time intervals at which the drops fall. The data corresponding to the time intervals thereof which have been counted by the counter are read out of the memory. The data thus read out are accumulated to determine the total quantities of the drops.

Claims

1. A stactometric apparatus comprising:

instilled drop-detecting means for generating a signal each time an instilled drop falls;

a counter coupled to said instilled drop-detecting means for measuring a time interval between falling instilled drops in response to output signals from said instilled drop-detecting means;

memory means having a plurality of memory addresses at which are respectively stored a plurality of drop volume data representing different volumes of drops corresponding to different time intervals between falling instilled drops;

reading means coupled to said memory means and to said counter for reading out the drop volume data from a memory address of said memory means which is specified by the contents of said counter;

moving average measuring means coupled to said memory means for measuring a moving average of at least the drop volume data successively read out by said reading means; and

a display device coupled to said moving average measuring means for displaying the moving average of the drop volume data which has been measured by said moving average measuring means.

2. The stactometric apparatus of claim 1, further comprising an accumulator for successively summing the drop volume data read out of said memory means.

3. The stactometric apparatus of claim 2, further comprising a drop volume display device coupled to said accumulator to display the amount of the drop volumes successively summed thereby.

4. The stactometric apparatus of claim 1, wherein said moving average measuring means comprises:

a random access memory (RAM) having a plurality of specified addresses for storing the drop volume data successively read out of said memory means in said specified addresses of said RAM; and

means coupled to said RAM for reading out the total volume of a prescribed number of falling instilled drops from said RAM, each time data on the latest instilled drop is stored therein and for determining a moving average of the amount of volumes of the prescribed number of falling instilled drops for each reading cycle.

5. A stactometric apparatus comprising:

urine drop-detecting means adapted to be coupled to a urethral catheter and arranged to generate an output signal each time a drop of coeliac urine of a human body falls;

a counter connected to said urine drop-detecting means for measuring a time interval between falling coeliac urine drops in response to output signals from said urine drop-detecting means;

a first memory having a plurality of memory addresses at which are respectively stored a plurality of urine drop volume data representing different urine drop volumes corresponding to different time intervals between falling urine drops;

reading means coupled to said first memory and to said counter for reading out the urine drop volume data from a memory address of said first memory which is specified by the count contents of said counter;

a weight data input means for producing weight data representing a weight of the human body;

a divider coupled to said weight data input means and to said first memory for calculating a urine drop volume per unit weight of the human body from the weight data and the urine drop volume data;

a second memory coupled to said divider for storing data representing the urine drop volume per unit weight;

second reading means coupled to said second memory for reading out a predetermined number of successive data representing urine drop volume per weight from said second memory, each time the latest data on the urine drop volume per weight is stored into said second memory;

calculating means coupled to said second reading means for calculating a moving average of the urine drop volumes from said successive data of urine drop volume per weight; and

a display device coupled to said calculating means for displaying the moving average of urine drop volume.

6. The stactometric apparatus of claim 5, further comprising a counter for summing the urine drop volume data read out of said first memory to determine the total amount of urine drops collected for a given length of time.

7. The stactometric apparatus of claim 5, wherein said first memory is a read only memory (ROM), and said second memory is a random access memory (RAM).

8. A stactometric apparatus comprising:

a medicinal solution feed pump for instilling a medicinal solution into a human body;

an instilled drop-detector coupled to said medicinal solution feed pump and arranged to generate an output signal each time a drop of instilled medicinal solution falls;

a first counter coupled to said instilled drop-detector for measuring a time interval between the instilled medicinal solution drops in response to the output signals from said instilled drop-detector;

memory means having a plurality of memory addresses at which are respectively stored a plurality of drop volume data representing different volumes of instilled medicinal solution drops corresponding to different time intervals between the falling of instilled medicinal solution drops;

reading means coupled to said memory means and to said first counter for reading out drop data from a memory address of said memory means which is specified by the count contents of said first counter;

comparison means coupled to said memory means for comparing the drop data read out from said memory means and a predetermined volume of the instilled medicinal solution to determine the excess or deficiency of a volume of actually instilled medicinal solution and for generating an output signal showing the result of said comparison;

a second counter coupled to said memory means for counting drop data read out from said memory means;

a display device coupled to said second counter for displaying the count contents of said second counter; and

means for coupling said output signal of said comparison means to said medicinal solution feed pump for controlling said medicinal solution feed pump as a function of said output signal of said comparison means to feed a proper amount of the medicinal solution to the human body.