Methods and systems for measuring and communicating pain and distress level
Systems and methods are described for communicating the distress or pain experienced by an infant or a non-communicative patient. The systems and methods can provide an objective quantification of pain and/or distress in conjunction with, e.g., various distressing procedures commonly found in the newborn intensive care unit (NICU). The systems may include a processor in communication with a distress level input device and a display configured to provide a representation of a pain or distress score calculated in the processor. The processor may include executable code to translate data from the distress level input into the distress score.
1. A method of communicating a pain level of a patient, comprising:
acquiring objective measurements of two parameters of the patient associated with the pain level and a first procedure, the parameters selected from the group consisting of heart rate variability, facial grimacing, and hand flexing;
scaling the objective measurements, according to magnitude estimation or a generalized labeled magnitude scale, to obtain logarithmically scaled scores;
determining, by a processor and based on the scaled scores, a pain score;
displaying a representation of the pain score;
calculating, by a processor, a future pain score by applying a decay rate according to a procedure load index based on data from another patient; and
displaying a representation of the future pain score.
2. The method of claim 1 , wherein acquiring the objective measurements of the two parameters associated with the pain level further comprises acquiring a signal corresponding to heart rate variability of the patient.
3. The method of claim 1 , wherein acquiring the objective measurements of the two parameters associated with the pain level further comprises acquiring a signal corresponding to facial grimacing of the patient.
4. The method of claim 1 , wherein acquiring the objective measurements of the two parameters associated with the pain level further comprises acquiring a signal corresponding to hand flexing of the patient.
5. The method of claim 1 , wherein determining a pain score comprises one of adding the two parameters, applying Boolean logic to the two parameters, or processing the two parameters with a neural network.
6. The method of claim 1 , wherein the representation of the pain score comprises a visual representation.
7. The method of claim 6 , wherein the visual representation comprises visible light.
8. The method of claim 7 , wherein the visible light is emitted from a ball or orb.
9. The method of claim 1 , further comprising: calculating a time when a combination of the future pain score and a second pain score associated with a second procedure will fall below a predetermined limit, wherein the second pain score is determined according to the procedure load index.
10. A system for measuring and communicating pain level comprising:
a sensory level input device configured to acquire objective measurements of two parameters selected from the group consisting of heart rate variability, facial grimacing, and hand flexing;
a processor communicably coupled to the sensory level input device, the processor having executable code configured to (i) scale the objective measurements, according to magnitude estimation or a generalized labeled magnitude scale, to obtain logarithmically scaled scores, (ii) determine, based on the scaled scores, a pain score, and (iii) calculate a future pain score by applying a decay rate according to a procedure load index based on data from another patient; and
a display configured to provide a representation of the pain score and a representation of the future pain score.
11. The system of claim 10 , wherein the sensory level input device is configured to provide data about the parameters.
12. The system of claim 11 , wherein the sensory level input device comprises two of an electrocardiogram monitor configured to provide data about heart rate variability, a facial electromyography monitor configured to provide data about facial grimacing, or a hand flexure sensor to provide data about hand flexing.
13. The system of claim 10 , wherein the sensory level input device is further configured to acquire an objective measurement of, a galvanic skin response, an electroencephalography signal, or a near-infrared spectroscopy signal.
14. The system of claim 10 , wherein the processor utilizes the procedure load index to determine the pain score.
15. The system of claim 10 , wherein the display provides a visual representation of the pain score.
16. The system of claim 15 , wherein the display comprises a ball or orb, and the visual representation comprises a colored light emitted from the ball or orb.
17. The system of claim 10 , wherein the processor is further configured to calculate a time when a combination of the future pain score and a second pain score associated with a second procedure will fall below a predetermined limit, wherein the second pain score is determined according to the procedure load index.
18. A method of measuring distress in a patient, comprising:
acquiring objective indications of two parameters associated with a distress level of the patient, the parameters being selected from the group consisting of heart rate of the patient, facial electromyography of the patient, and hand flexing of the patient;
scaling the objective indications, according to magnitude estimation or a generalized labeled magnitude scale, to obtain logarithmically scaled scores;
determining, based on the scaled scores, a distress score;
displaying a representation of the distress score on a display;
calculating, by a processor, a future distress score by applying a decay rate according to a procedure load index based on data from another patient; and
displaying a representation of the future distress score.
19. The method of claim 18 , wherein acquiring the objective indications of the distress level of the patient comprises assigning the distress level based on selection of a particular distressing procedure.
20. The method of claim 19 , wherein translating data from the objective indications of the distress level into the distress score comprises looking up a pre-determined distress level associated with the particular distressing procedure in the procedure load index.
21. The method of claim 18 , further comprising: calculating a time when a combination of the future distress score and a second distress score associated with a second procedure will fall below a predetermined limit, wherein the second distress score is determined according to the procedure load index.