Methods and Systems for Treating Intracranial Hypertension and Related Indications Using An Optic Nerve Stent or Shunt

Abstract

Embodiments of the present specification provide surgical methods and apparatuses to deploy at least one stent through an optic nerve sheath in order to maintain an opening/fenestration for intracranial fluid egress. The surgical method creates a fenestration, an opening, a slit, or a hole, through an optic nerve sheath of a human patient. The fenestration is created in a minimally invasive manner using an applicator, such as an endoscopic visualization apparatus, that includes a stent or shunt for deploying through the fenestration. The presently disclosed specification is indicated to treat papilledema and/or intracranial hypertension and to deliver therapeutic compositions through the optic nerve sheath.

We claim: 
     
         1 . A surgical method for treating at least one of intracranial hypertension and papilledema in a patient, comprising:
 navigating an applier device along a curvature of an eye of the patient without removing a medial rectus muscle associated with said eye;   injecting a viscoelastic between the sclera of said eye and a Tenon's capsule associated with said eye;   inserting at least one stent into an optic nerve sheath associated with the eye;   observing an amount of fluid egress from the at least one stent; and   removing the viscoelastic.   
     
     
         2 . The method of  claim 1  further comprising creating a conjunctival access behind said eye. 
     
     
         3 . The method of  claim 2  comprising performing at least one of a medial peritomy on said eye prior to injecting said viscoelastic and a conjunctival incision on said eye prior to injecting said viscoelastic. 
     
     
         4 . The method of  claim 3 , wherein the medial peritomy is performed in a direction from 12 o'clock to 6 o'clock. 
     
     
         5 . The method of  claim 2  comprising performing a conjunctival incision. 
     
     
         6 . The method of  claim 1  further comprising dissecting bluntly to bare the sclera prior to injecting said viscoelastic. 
     
     
         7 . The method of  claim 6 , wherein the dissecting is performed with Westcott scissors. 
     
     
         8 . The method of  claim 1  further comprising isolating the medial rectus muscle prior to injecting said viscoelastic. 
     
     
         9 . The method of  claim 1  further comprising identifying an insertion site on an optic nerve associated with the eye. 
     
     
         10 . The method of  claim 9  wherein the insertion site is at a distance of at least 1.5 mm from a globe of said eye. 
     
     
         11 . The method of  claim 9  comprising inserting the at least one stent at the insertion site, wherein said insertion site is at least 1.5 mm posterior to the optic nerve. 
     
     
         12 . The method of  claim 1  comprising inserting the at least one stent having a length between 3 mm and 6 mm. 
     
     
         13 . The method of  claim 12  comprising inserting the at least one stent having a diameter of 6 mm or less. 
     
     
         14 . The method of  claim 1  wherein the at least one stent comprises material with properties that are a combination of one or more of: bio-degradable, heparin-coated, non-ferromagnetic Titanium, polyamide, super-elastic, bio-compatible, an alloy of Nickel-Titanium, rigid, flexible, expandable, and non-expandable. 
     
     
         15 . The method of  claim 1  wherein the at least one stent has as an elongated tube. 
     
     
         16 . The method of  claim 15  wherein the at least one stent has a flat structure. 
     
     
         17 . The method of  claim 1  wherein the at least one stent shaped is J shaped, wherein a longer side of the J-shaped stent is longitudinally placed within the optic nerve sheath, and wherein the curved, shorter side maintains an opening to an outside of said optic nerve sheath. 
     
     
         18 . The method of  claim 1  wherein the at least one stent further comprises one or more sensors. 
     
     
         19 . The method of  claim 1  wherein the at least one stent further comprises one or more therapeutic compositions. 
     
     
         20 . The method of  claim 1  further comprising inspecting the site of inserting for fluid egress.