Wireless ventilator reporting
Systems and methods regarding ventilation of a patient, such as a victim at the scene of an emergency are described herein.
1. A medical system for assisting care of a patient experiencing respiratory distress, comprising:
a manual patient ventilation unit defining an airflow path, the unit arranged so that when the unit is applied to a conscious patient experiencing dyspnea, the airflow path is in fluid communication with the patient's airway, the manual patient ventilation unit comprising a ventilation bag configured to enable manual ventilation of the patient by a rescuer;
sensors positioned in the airflow patent of the conscious patient experiencing dyspnea, the sensors being configured to sense a presence of airflow and gas pressure in the airflow path of the conscious patient experiencing dyspnea;
a processor arranged to:
receive from the sensors the sensed gas pressure and the sensed airflow,
during administration of the manual ventilation to the patient, determine one or more quality parameters based on the received sensed gas pressure and sensed airflow from the sensors and provide manual ventilation feedback comprising instructions for performing ventilation based upon a comparison of the determined ventilation quality parameters and predetermined acceptable values for administering ventilations to the patient, and
when the patient is spontaneously breathing, determine spirometric information based on the sensed airflow and sensed gas pressure, the spirometric information comprising:
(a) a gas flow rate, and
(b) a total gas volume for inhalation and exhalation by the patient over a predetermined period of time; and
a feedback unit configured to provide the manual ventilation feedback and visual feedback for the spirometric information to a rescuer.
2. The system of claim 1 , wherein the gas flow rate and/or the gas flow volume and the total gas volume are simultaneously displayed.
3. The system of claim 1 , wherein the feedback unit is configured to display the gas flow rate and total gas volume in the form of a graphical plot.
4. The system of claim 1 , wherein the feedback unit is configured to display the gas flow rate and total gas volume in the form of side-by-side numerics.
5. The system of claim 1 , wherein the feedback unit is configured to display a single value that provides a measure of the squareness of a spirometry curve based on the spirometric information.
6. The system of claim 1 , wherein the processor is arranged to
compute a breathing pressure during the patient's inflow cycle based on the data from the sensors configured to sense gas pressure in the airflow path; and
determine that the patient is spontaneously breathing when the computed breathing pressure is a negative pressure, and
wherein the feedback unit is configured to provide an indication of spontaneous breathing when the negative pressure is identified.
7. The system of claim 6 , wherein the indication of spontaneous breathing further comprises a notification indicating a potential return of spontaneous circulation.
8. The system of claim 1 , wherein, when the patient is spontaneously breathing, the processor is arranged to compute a forced vital capacity (FVC) and forced expiratory volume (FEV) over a predetermined interval for the patient based on data received from the sensors and to calculate a ratio of FVC/FEV.
9. The system of claim 8 , wherein the feedback unit is configured to display the FVC/FEV ratio.
10. The system of claim 8 , wherein the processor is further configured to detect at least one of the following conditions based, at least in part, on the computed lung compliance: barotrauma, hemothorax, pneumothorax, intubation in the mainstem, flail chest, or pediatric lung distension.
11. The system of claim 1 , wherein the manual patient ventilation unit further comprises a handheld breathing tube, the handheld breathing tube defining, at least in part, the airflow path of the conscious patient experiencing dyspnea.
12. The system of claim 11 , wherein the handheld breathing tube comprises a gripping portion in the shape of a mouthguard.
13. The system of claim 1 , wherein, when the patient is spontaneously breathing, the processor is further configured to compute lung compliance based on the gas flow rate and the total gas volume.
14. The system of claim 1 , wherein the sensors comprise at least one of an airflow sensor, a differential pressure sensor, or a pressure sensor.
15. The system of claim 1 , wherein the processor comprises circuitry configured for delivery of electromagnetic stimulation to the patient.
16. The system of claim 1 , further comprising at least one capnography sensor in the patient's airway.
17. The system of claim 16 , wherein the spirometric information further comprises an oxygen or carbon dioxide volume based on a determined ventilation volume and data sensed by the capnography sensor.
18. The system of claim 1 , wherein the processor is arranged to determine the total gas volume of gas delivered to or expelled from the lungs of the patient over the predetermined period of time based on the gas flow rate for individual inhalations or exhalations integrated over the predetermined period of time.
19. The system of claim 18 , wherein the gas flow volume is calculated based on the gas flow rate and the sensed gas pressure for inhalations or exhalations by the patient.
20. The system of claim 1 , wherein the ventilation bag comprises a flexible reservoir containing ventilatory gases configured to enable manual ventilation of the patient by the rescuer squeezing the flexible reservoir.
21. The system of claim 1 , wherein the ventilation quality parameters comprise one or more of tidal volume, minute volume, end-inspiratory pressure, and maximum ventilation pressure.
22. The system of claim 1 , wherein the processor is remote from the sensors, and wherein the sensed gas pressure and the sensed airflow are wirelessly sent from the sensors to the processor.
23. The system of claim 1 , further comprising at least one chest compression sensor configured to detect and measure compression information when chest compressions are applied to the patient,
wherein the processor is arranged to:
receive compression data generated by the at least one chest compression sensor;
determine one or more chest compression parameters based at least in part on the measured compression information; and
provide chest compression feedback to the rescuer along with the manual ventilation feedback.
24. The system of claim 23 , wherein the chest compression feedback comprises instructions for performing chest compressions based upon a comparison of the chest compression parameters with a chest compression protocol comprising ranges of predetermined acceptable values for administering chest compressions to the patient.