Devices, systems, and methods for otology
Devices, systems, and methods can be employed to facilitate performing procedures in the outer, middle, and/or inner ear in order to diagnose and/or treat disorders including, but not limited to, hearing loss and other ear disorders. For example, this document describes devices, systems and methods that include instruments and techniques to minimize the invasiveness and/or to enhance the efficacy of procedures that are performed in the outer, middle, and/or inner ear spaces such as mastoidectomy, tympanoplasty, cholesteatoma treatments, otosclerosis treatments, and Eustachian tube treatments.
1. A method for treating cholesteatoma in a middle ear, the method comprising:
advancing, via an outer ear canal and a trans-tympanic membrane approach into the middle ear, a shaft of an instrument through a lumen in the tympanic membrane having an access diameter of 0.5 mm to 1.0 mm such that a distal tip of the instrument comes into contact with the cholesteatoma in the middle ear at a location spaced posteriorly away from a Eustachian tube, wherein the instrument is configured to provide a combination of injection and ultrasound emulsification;
while at least a portion of the shaft of the instrument is positioned in the lumen in the tympanic membrane having the access diameter of 0.5 mm to 1.0 mm, delivering a therapeutic treatment that includes both a therapeutic agent injection and ultrasound emulsification from the distal tip of the instrument to the cholesteatoma to debulk the cholesteatoma via the trans-tympanic membrane approach at a first time; and
after said delivering the therapeutic treatment that includes both the therapeutic agent injection and ultrasound emulsification to debulk the cholesteatoma at the first time, advancing at a second later time, a subsequent instrument through a subsequent lumen in the tympanic membrane having an access diameter of 0.5 mm to 1.0 mm such that a distal tip of the subsequent instrument comes into contact with a regrowth of the cholesteatoma in the middle ear at the location spaced posteriorly away from the Eustachian tube; and
while at least a portion of the shaft of the subsequent instrument is positioned in the subsequent lumen in the tympanic membrane having the access diameter of 0.5 mm to 1.0 mm, delivering a subsequent therapeutic treatment that includes both a subsequent therapeutic agent injection and ultrasound emulsification from the distal tip of the subsequent instrument to the cholesteatoma to debulk the cholesteatoma via the trans-tympanic membrane approach at the second later time.
2. The method of claim 1 , wherein the advancing at said first time comprises moving the shaft of the instrument through a perforation in the tympanic membrane.
3. The method of claim 2 , further comprising placing a port device in the perforation in the tympanic membrane such that the port device defines the access diameter of 0.5 mm to 1.0 mm.
4. The method of claim 1 , wherein the shaft of the instrument at the first time is configured to advance through the lumen in the tympanic membrane having the access diameter of 0.5 mm to 1.0 mm and comprises a steerable or deflectable shaft.
5. The method of claim 4 , wherein the therapeutic agent injected into the cholesteatoma at the first time via the trans-tympanic membrane approach comprises a sustained release formulation.
6. The method of claim 5 , wherein the therapeutic agent injected into the cholesteatoma at the first time via the trans-tympanic membrane approach comprises a keratolytic agent, an immune response modifier, or a cryotherapy agent.
7. The method of claim 6 , wherein the therapeutic agent injected into the cholesteatoma at the first time via the trans-tympanic membrane approach is administered in combination with said ultrasound emulsification for tissue removal in the middle ear.
8. The method of claim 4 , wherein said delivering the subsequent therapeutic treatment that includes both the subsequent therapeutic agent injection and ultrasound emulsification at the second later time is one or more years after the first time.
9. The method of claim 1 , wherein the instrument is configured to provide a combination of endoscopy, injection, and ultrasound emulsification.
10. The method of claim 1 , further comprising providing visual confirmation of the cholesteatoma in the middle ear prior to patient reported symptoms.