Fluid monitoring apparatus

• US 4,922,922 A
• Filed: 04/12/1988
• Issued: 05/08/1990
• Est. Priority Date: 04/12/1988
• Status: Expired due to Term

• Current Assignee: Murphy R. Edward, Richard A. Pollock
• Original Assignee: Murphy R. Edward, Richard A. Pollock
• Inventors: Murphy, R. Edward, Pollock, Richard A.
• Primary Examiner(s): Hindenburg, Max
• Application Number:
  US07/180,453
• Time in Patent Office: 756 Days
• Field of Search: 128/632, 128/633, 128/635, 128/760, 128/771, 128/744, 128/779, 604/317-320, 604/404, 604/407, 312/209, 312/211
• US Class Current: 600/573
• CPC Class Codes: A61B 2090/0805 automatically, e.g. by means of magnetic, optical or photoelectric detectors
• CPC Class Codes: A61B 2217/005 with suction drainage system
• CPC Class Codes: A61B 2217/007 with irrigation system
• CPC Class Codes: A61B 5/02042 Determining blood loss or bleeding, e.g. during a surgical procedure
• CPC Class Codes: A61B 50/37 for absorbent articles, e.g. bandages, garments, swabs or towels
• CPC Class Codes: A61B 90/90 Identification means for patients or instruments, e.g. tags
• CPC Class Codes: A61M 1/777 Determination of loss or gain of body fluids due to suction-irrigation, e.g. during surgery
• CPC Class Codes: G01G 17/04 for weighing fluids, e.g. gases, pastes
• CPC Class Codes: G01G 19/414 using electronic computing means only
• CPC Class Codes: G16H 20/40 relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture
• CPC Class Codes: G16H 40/63 for local operation
• CPC Class Codes: Y02A 90/10 Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Abstract

Apparatus for accurately and more safely monitoring blood and bodily fluids in a patient. In one embodiment, at least one load cell supports a container for receiving various sizes of sponges that hold such fluids. The sponges may be sorted into the container utilizing a sorting grip located above or forming a part of the container, and photoelectric or other sensors detect the number of sponges placed into the container via each opening in the grid. The load cells and sensors are connected to controller circuitry which counts, tracks and displays the number of each size of sponges in the container and the weight of fluid in the sponges. The weighing apparatus may be connected to a computer that is programed to read information from the weighing apparatus and from its own keyboard to calculate, update, store, display and print values corresponding to amounts of suction products, urine, crystalloids, irrigation, miscellaneous blood products including whole blood, fresh frozen plasma, packed red blood cells, platelets, cryoprecipitates and stimates introduced to or removed from the patient. The processor of the weighing apparatus may be adapted to perform the computer'"'"'s functions in order to reduce the size of the apparatus. Alternatively, a computer without a weighing apparatus may be used to account for the values mentioned above, in which case the operator manually enters information relating to numbers and weights of sponges.

Claims

1. Apparatus for monitoring body fluids from a patient, comprising,

(a) at least one container for receiving materials that contain body fluids from the patient;

(b) a sorting grid located above the container and forming a plurality of openings corresponding to predetermined sizes of the materials;

(c) at least one load cell supporting the container for weighing the materials;

(d) at least one sensor for each opening in the grid for sensing placement of materials into the container;

(e) input/output means connected to the load cells and sensors for receiving information produced by the load cells and sensors;

(f) storage means for storing information received from the processor means and the input/output means;

(g) processor means connected to the input/output means and the storage means for processing information received from the input/output means and the storage means; and

(h) display means for displaying information relating to weight of fluids in the materials and counts of materials in the container.

2. Apparatus according to claim 1 in which the input/output means further comprises manual input means for entering information manually.

3. Apparatus according to claim 1 in which the sensor means comprises a plurality of photoelectric sensors, each having an optical path which intersects the space below an opening in the grid and above the container.

4. Apparatus according to claim 1 in which the storage means comprises at least one counter corresponding to each opening in the grid.

5. Apparatus according to claim 4 in which the input/output means comprises manual input means that include an on/off switch, a clear switch for resetting the counters in the storage means and at least one counter switch for altering information stored in the counters.

6. Apparatus according to claim 5 in which the manual input means further comprises a tare switch for causing the apparatus to tare the weight of the materials.

7. Apparatus according to claim 5 in which the manual input means further comprises a zero switch for causing the apparatus to account for the weight of the container.

8. Apparatus according to claim 5 in which the manual input means further comprises a span switch for causing calibration of the span of the apparatus.

9. Apparatus according to claim 1 in which the display means comprises a fluorescent display.

10. Apparatus for monitoring body fluids from a patient, comprising:

(a) a container for receiving sponges that contain body fluids from the patient;

(b) a sorting grid located above the container and forming a plurality of openings corresponding to predetermined sizes of sponges;

(c) at least one load cell supporting the container for weighing the sponges in the container;

(d) at least one photoelectric sensor corresponding to each opening in the grid, whose optical path intersects the space below the opening and above the container;

(e) input/output means connected to the load cells and sensors for receiving information produced by the load cells and sensors as well as manually entered information;

(f) storage means for storing information received from processor means and from the input/output means, which storage means includes at least one counter corresponding to each opening in the grid;

(g) processor means connected to the input/output means and the storage means for processing information received from the input/output means and the storage means; and

(h) display means for displaying information relating to weight of fluids in the sponges and number of sponges in the container.

11. Apparatus according to claim 10 in which the input/output means further comprises an on/off switch, a clear switch for resetting the counters in the storage means and at least one counter switch for altering information stored in the counters.

12. Apparatus according to claim 11 in which the input/output means further comprises a tare switch for causing the apparatus to tare the weight of the sponges.

13. Apparatus according to claim 11 in which the input/output means further comprises a zero switch for causing the processor to account for the weight of the container.

14. Apparatus according to claim 11 in which the input/output means further comprises a span switch for causing the processor to calibrate the span of the apparatus.

15. Apparatus for monitoring weight and volume of body fluids in a patient, comprising:

(a) at least one container for receiving materials that contain body fluids from the patient;

(b) a sorting grid located above the container and containing a plurality of openings corresponding to predetermined sizes of materials;

(c) at least one load cell supporting the container for weighing the materials;

(d) at least one sensor corresponding to each opening in the grid for sensing placement of materials into the container;

(e) input/output means connected to the load cells and sensors for receiving information produced by the load cells and sensors;

(f) storage means for storing information received from processor means and the input/output means;

(g) processor means connected to the input/output means and the storage means for processing information received from the input/output means and the storage means;

(h) a keyboard connected to the input/output means for manual entry of information and commands into the apparatus;

(i) a printer connected to the input/output means for printing information relating to weight and volume of fluids in the patient; and

(j) a display connected to the input/output means for displaying information relating to weight and volume of fluids in the patient.

16. Apparatus for monitoring weight and volume of body fluids in a patient, comprising:

I. Apparatus for weighing body fluids taken from the patient, comprising;

(a) a container for receiving sponges that contain body fluids from the patient;

(b) a sorting grid located above the container and forming a plurality of openings corresponding to the predetermined sizes of sponges;

(c) at least one load cell supporting the container for weighing the sponges in the container;

(d) at least one photoelectric sensor corresponding to each opening in the grid, whose optical path intersects the space below the opening and above the container;

(e) input/output means connected to the load cells and sensors for receiving information produced by the load cells and sensors as well as manually entered information;

(f) storage means for storing information received from processor means and from the input/output means, which storage means includes at least one register corresponding to each opening in the grid;

(g) processor means connected to the input/output means and the storage means for processing information received from the input/output means and the storage means; and

(h) display means for displaying information relating to weight of fluids in the sponges and number of sponges in the container; and

II. A computer for receiving information from the weighing apparatus and from a keyboard and for calculating, updating, storing and displaying information relating to weight and volume of body fluids in the patient, comprising;

(a) processor means for processing information received from the weighing apparatus and from an input/output means and storage means;

(b) storage means for storing information received from the processor means and from an input/output means;

(c) input/output means connected to the processor which input/output means includes a keyboard; and

(d) display means connected to the input/output means for displaying information relating to weight and volume of body fluids in the patient.

17. Apparatus according to claim 16 further comprising a printer connected to the computer input/output means for printing information relating to weight and volume of body fluids in the patient.

18. Apparatus according to claim 16 in which the computer further comprises program means for causing the computer to perform the following steps:

(a) read patient'"'"'s blood quantity values from the keyboard;

(b) read hematocrit values from the keyboard;

(c) read fluid weight values transmitted by the weighting apparatus;

(d) read sponge count values transmitted by the weighing apparatus;

(e) read sponge tare weight values transmitted by the weight apparatus;

(f) read suction values from the keyboard;

(g) read urine removed values from the keyboard;

(h) read crystalloid quantity infused values from the keyboard;

(i) read irrigation solution used values from the keyboard;

(j) read quantity of miscellaneous blood products used values from the keyboard;

(k) read quantity of fresh frozen plasma used values from the keyboard;

(l) read packed red blood cells used values from the keyboard;

(m) read platelets used values from the keyboard;

(n) read cryoprecipitate used values from the keyboard;

(o) read stimate used values from the keyboard; and

(p) update, store and display the values read in the steps recited above.