Blood loss monitor

• US 4,583,546 A
• Filed: 11/18/1983
• Issued: 04/22/1986
• Est. Priority Date: 11/18/1983
• Status: Expired due to Fees

• Current Assignee: Patria P. Garde
• Original Assignee: Patria P. Garde
• Inventors: Garde, Patria P.
• Primary Examiner(s): Coven, Edward M.
• Application Number:
  US06/553,291
• Time in Patent Office: 886 Days
• Field of Search: 128/638, 128/639, 128/138 A, 128/736, 128/742, 128/771, 128/635, 128/419 R, 340/604, 604/358, 604/361
• US Class Current: 600/371
• CPC Class Codes: A61B 5/02042 Determining blood loss or bleeding, e.g. during a surgical procedure
• CPC Class Codes: A61F 15/00 Auxiliary appliances for wound dressings; Dispensing containers for dressings or bandages packaging of absorbent articles such as diapers, feminine hygiene absorbing pads or tampons A61F13/551; packaging of wound dressings A61F13/00072

Abstract

A blood loss monitor which signals blood loss and profuse bleeding utilizing the physical characteristics of blood to indicate bleeding and wetness in different levels of a pad.

Claims

1. A monitor of blood loss from a patient comprising the combination of a pad having a means for detecting blood presence and means for detecting wetness which indicates wetness from blood and non-blood fluids, and means associated with said pad for indicating the presence of blood and wetness from said detecting means, and providing an electrical signal for each indication, whereby the activation of all signals indicates profuse blood loss.

2. The monitor according to claim 1 wherein said means for detecting means comprises electrical contacts which are activated by a fluid bridge formed by blood or other fluids.

3. The monitor according to claim 1 wherein said means for detecting wetness and the means for detecting blood are each pH indicators and are activated when the pH of blood can be detected.

4. The monitor of claim 3 wherein said pH indicators are placed at different positions in the pad so as to indicate a degree of fluid penetration in the pad.

5. The monitor of claim 3 including light means associated with said blood detecting means and said wetness detecting means for providing a visual signal upon activation of the blood detecting means and the wetness detecting means.

6. The monitor of claim 5 including a means associated with said blood detecting means and said wetness detecting means for providing an audio signal upon activation of the blood detecting means and the wetness detecting means.

7. The monitor of claim 1 including means for resetting signal readings which indicate the presence of wetness.

8. The monitor of claim 1 including temperature indicating means in said pad.

9. The monitor of claim 1 wherein the blood presence detecting means is a glucose measuring meter.

10. The monitor of claim 1 wherein the wetness detecting means is a glucose measuring meter.

11. The monitor of claim 1 wherein the blood presence and wetness detecting means are each glucose measuring meters.

12. A method for detecting profuse blood loss from a patient comprising providing means for measuring the presence of blood only, measuring the presence of blood at a predetermined position with said means, electrically signalling the presence of blood at said predetermined position, providing means for measuring wetness by all fluids at another predetermined position, measuring the presence of wetness with said wetness measuring means, electrically signalling the presence of wetness, and distinguishing blood wetness from other wetness from the combined signals so as to indicate profuse blood loss.

13. The method of claim 12 wherein the presence of blood at said predetermined position is electrically signalled a pH indicator.

15. The method of claim 12 wherein the wetness measuring means indicates the formation of an electrical fluid bridge.

16. The method of claim 12 wherein the blood presence and wetness is measured by pH.

14. A method for detecting profuse blood loss from a patient and simultaneously distinquishing blood loss from other body fluids which comprises providing a fluid absorbent pad having at a first predetermined position means for measuring the pH of blood, measuring for the pH of blood at said first position, providing signal generating means in association with said blood pH measuring means, signalling the presence of blood with said signal generating means, providing wetness indicator means at a second predetermined position in said pad for indicating wetness and signal generating means in association with said wetness indicator means, signalling wetness at said second predetermined position, whereby the simultaneously activation of the signal means for blood and the wetness indicates profuse blood loss.

17. A method for detecting profuse blood loss from a patient and simultaneously distinguishing blood loss from other body fluids which comprises providing a fluid absorbent pad having at a first predetermined position means for measuring the pH of blood and signal generating means associated with said blood pH measuring means for signalling the presence of blood, providing wetness indicator means at a second predetermined position in said pad for indicating wetness and signal generating means associated with said wetness indicator means for signalling wetness, whereby the simultaneously activation of the signal means for blood and the wetness indicates profuse blood loss.