Treatment of acute medical conditions

Patent metadata

Field	Value
Publication number	US-11724108-B2
Application number	US-202217872703-A
Country	US
Kind code	B2
Filing date	Jul 25, 2022
Priority date	Dec 20, 2017
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

Electrical stimulation of neural activity in the neural innervation of the spleen provides a useful way to treat acute medical conditions. The disclosed systems and methods stimulate the neural activity of a nerve supplying a spleen, wherein the nerve is associated with a neurovascular bundle, such that the electrical signal produces an improvement in a physiological parameter indicative of treatment of an acute medical condition.

First claim

The invention claimed is:

1. A system for stimulating the neural activity of a nerve supplying a spleen for treating an acute medical condition, wherein the acute medical condition is trauma, shock, allograph/graph rejection, or an effect of a bacterial endotoxin, wherein the nerve is associated with a neurovascular bundle, preferably a splenic arterial nerve, the system comprising:
at least one electrode in signaling contact with the nerve; and
at least one controller electrically coupled to the at least one electrode, the at least one controller configured to control operation of the at least one electrode to apply an electrical signal to the nerve,
wherein the electrical signal has a waveform that comprises one or more pulse trains, wherein a charge density per phase applied to the nerve by the electrical signal is ≥70 μC per cm 2 per phase and ≤1300 μC per cm 2 per phase,
wherein the electrical signal produces an improvement in a physiological parameter indicative of treatment of the acute medical condition,
wherein the improvement in the physiological parameter is any of the group consisting of: restoring a body temperature to between 36° C. and 38° C., restoring a heart rate to 60-100 bpm, restoring a systemic arterial pressure to between 90/60 mmHg and 150/90 mmHg, restoring a systemic venous pressure to about 5 mmHg in a right atrium and about 8 mmHg in a left atrium, restoring a pulmonary pressure to about 15 mmHg, restoring a central venous pressure to in a range of about 3 to 8 mmHg, restoring a breathing rate to 8-14 breaths per minute, an increase in oxygen saturation to ≥94%, an increase in an arterial partial pressure of oxygen to 12-15 kPa, restoring an arterial partial pressure of carbon dioxide to 4.4-6.1 kPa, a reduction of pain sensation, restoring urine output to ≥0.5 ml/kg/hr, increasing a level of consciousness, a reduction in a level of lactate, a change in a level of blood glucose, a change in a level of base deficit in blood and a change in a level of arterial pH, restoring lower levels of pulmonary vascular resistance while increasing systemic vascular resistance and increasing pulmonary capillary wedge pressure, reducing high levels of lipases, and reducing high levels of amylases.

2. The system of claim 1 , wherein the trauma is blunt trauma, penetrating trauma, blast injury or burns.

3. The system of claim 1 , wherein the shock is anaphylactic shock, toxic shock syndrome, cardiogenic shock, hypovolemic shock, neurogenic shock, or endotoxic shock.

4. The system of claim 1 , wherein the acute medical condition is an effect of a bacterial endotoxin.

5. The system of claim 1 , further comprising a neural interface, the neural interface comprising the at least one electrode.

6. The system of claim 5 , wherein the neural interface is placed around at least one splenic arterial nerve.

7. The system of claim 5 , wherein the neural interface is placed around a splenic artery.

8. The system of claim 5 , wherein the neural interface is placed on at least one splenic arterial nerve.

9. The system of claim 5 , wherein the neural interface is placed on a splenic artery.

10. A method of reversibly stimulating neural activity in a nerve supplying a spleen, wherein the nerve is associated with a neurovascular bundle, the method comprising:
providing the system of claim 1 ;
positioning the at least one electrode in signaling contact with the nerve; and
controlling the operation of the at least one electrode with the at least one controller to apply the electrical signal to at least one splenic arterial nerve to stimulate neural activity.

11. The method of claim 10 , further comprising a neural interface, the neural interface comprising the at least one electrode.

12. The method of claim 11 , wherein the neural interface is placed around the at least one splenic arterial nerve.

13. The method of claim 11 , wherein the neural interface is placed around a splenic artery.

14. The method of claim 11 , wherein the neural interface is placed on the at least one splenic arterial nerve.

15. The method of claim 11 , wherein the neural interface is placed on a splenic artery.

16. A method for treating an acute medical condition, wherein the acute medical condition is trauma, shock, allograph/graph rejection, or an effect of a bacterial endotoxin, the method comprising applying an electrical signal with a waveform that comprises one or more pulse trains, to stimulate the neural activity of a nerve supplying a spleen, wherein the nerve is associated with a neurovascular bundle, wherein a charge density per phase applied to the nerve by the electrical signal is ≥70 μC per cm 2 per phase and ≤1300 μC per cm 2 per phase, such that the electrical signal produces an improvement in a physiological parameter indicative of treatment of an acute medical condition, wherein the improvement in the physiological parameter is any of the group consisting of: restoring a body temperature to between 36° C. and 38° C., restoring a heart rate to 60-100 bpm, restoring a systemic arterial pressure to between 90/60 mmHg and 150/90 mmHg, restoring a systemic venous pressure to about 5 mmHg in a right atrium and about 8 mmHg in a left atrium, restoring a central venous pressure to in a range of about 3-8 mmHg, restoring a pulmonary pressure to about 15 mmHg, restoring a breathing rate to 8-14 breaths per minute, an increase in oxygen saturation to ≥94%, an increase in an arterial partial pressure of oxygen to 12-15 kPa, restoring an arterial partial pressure of carbon dioxide to 4.4-6.1 kPa, a reduction of pain sensation, restoring urine output to ≥0.5 ml/kg/hr, increasing a level of consciousness, a reduction in a level of lactate, a change in a level of blood glucose, a change in a level of base deficit in blood and a change in a level of arterial pH, restoring lower levels of pulmonary vascular resistance while increasing systemic vascular resistance and increasing pulmonary capillary wedge pressure, reducing high levels of lipases, and reducing high levels of amylases.

17. The method of claim 16 , wherein the trauma is blunt trauma, penetrating trauma, blast injury or burns.

18. The method of claim 16 , wherein the shock is anaphylactic shock, toxic shock syndrome, cardiogenic shock, hypovolemic shock, neurogenic shock, or endotoxic shock.

19. The method of claim 16 , wherein the acute medical condition is an effect of a bacterial endotoxin.

20. The method of claim 16 , wherein the acute medical condition is allograph/graph rejection.

Assignees

• Galvani Bioelectronics Ltd

Inventors

• Chew Daniel John
• Donega Matteo
• Gupta Isha

Classifications

• A61N1/36071 Primary

  Pain · CPC title

• A61N1/0553

  Paddle shaped electrodes, e.g. for laminotomy · CPC title

• A61N1/0556

  Cuff electrodes · CPC title

• A61N1/205

  for promoting a biological process · CPC title

• A61N1/3616

  Voltage density or current density · CPC title