초록 ▼

A reusable cannula that supports minimally invasive surgical procedures, such as endoscopic and thorascopic procedures, fabricated from a composition including polyarylsulfone material that is non-conductive, radiolucent, and sterilizable. The cannula is compatible with endoscopic devices as well as

A reusable cannula that supports minimally invasive surgical procedures, such as endoscopic and thorascopic procedures, fabricated from a composition including polyarylsulfone material that is non-conductive, radiolucent, and sterilizable. The cannula is compatible with endoscopic devices as well as standard housing/seal and trocar systems.

대표청구항 ▼

1. A reusable nonmetallic cannula assembly comprising a cannula sleeve fabricated from a composition which includes a nonconductive, sterilizable polyarylsulfone. 2. The cannula assembly according to claim 1, wherein the polyarylsulfone comprises repeating units of the formula:&Parenopenst;&Brketclo

1. A reusable nonmetallic cannula assembly comprising a cannula sleeve fabricated from a composition which includes a nonconductive, sterilizable polyarylsulfone. 2. The cannula assembly according to claim 1, wherein the polyarylsulfone comprises repeating units of the formula:&Parenopenst;&Brketclosest;Ar(E) 4—SO2—Ar(E)4—O&Brketopenst;&Brketclosest;Ar(E)4—{—D—Ar(E)4—}m—O&Brketopenst;n&Parenclosest;pwhere Ar is a 6 to 20 carbon aromatic radical; D is (a) a divalent hydrocarbyl radical, of which all or different portions can be (i) linear, branched, cyclic or bicyclic, (ii) aliphatic or aromatic, and/or (iii) saturated or unsaturated, said divalent hydrocarbyl radical being composed of 1-35 carbon atoms together with up to five oxygen, nitrogen, sulfur and/or halogen atoms; or (b) a divalent S, S 2, SO, SO2, O or CO radical; or (c) a single bond; each E is independently hydrogen, a halogen, a C1-C12, hydrocarbyl radical or a nitro or nitrile radical; m is 0 or 1; and n is from 0 to about 3, and p is from 1 to about 500.3. The cannula assembly according to claim 2, wherein Ar is phenylene, D is a single bond or a divalent hydrocarbyl radical and each E is independently hydrogen, halogen or C1-C12hydrocarbyl radical.4. The cannula assembly according to claim 1, wherein the composition further comprises one or more polymeric materials.5. The cannula assembly according to claim 4, wherein the polymeric materials are selected from the group consisting of polyesters, styrene polymers and elastomers.6. The cannula assembly according to claim 1, wherein the composition further comprises one or more additives selected from the group consisting of antimicrobial agents, antioxidants, opacifying agents, antistatic agents, fillers, reinforcing agents, hydrolytic stabilizers, stabilizers against basic impurities, lubricants, mold release agents, pigments, dyes, colorants, plasticizers, heat stabilizers, and ultraviolet light stabilizers.7. A cannula assembly according to claim 1, wherein the cannula can withstand in excess of 100 sterilization cycles without substantially degrading its structural integrity.8. The cannula assembly according to claim 1, further including a cannula housing mounted to the cannula.9. The cannula according to claim 1, wherein the cannula contains a proximal end comprising an attachment mechanism and a sheath connected to the proximal end.10. The cannula according to claim 9, wherein the proximal end comprises a monolithically formed housing.11. A reusable nonmetallic cannula assembly comprising a cannula sleeve fabricated from a composition which includes a nonconductive, sterilizable polyarylsulfone and one or more additives admixed with the polyarylsulfone singly or in combination selected from the group consisting of antimicrobial agents and mold release agents. 12. A reusable nonmetallic cannula assembly comprising a cannula sleeve fabricated from a composition which includes a nonconductive, sterilizable polyarylsulfone and one or more additives admixed with the polyarylsulfone singly or in combination selected from the group consisting of antioxidants and ultraviolet light stabilizers.