Applicator and method for dispensing a fluid and a particulate

Patent metadata

Field	Value
Publication number	US-9492646-B2
Application number	US-201313786901-A
Country	US
Kind code	B2
Filing date	Mar 6, 2013
Priority date	Mar 6, 2013
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

An applicator and method for dispensing a stream of a particulate and a fluid from a cannula and a mixing tip. The mixing tip includes a housing having an inlet, an outlet, and a mixing channel extending therebetween. A fin is positioned within the housing and extends along at least a portion of the mixing channel. The fin spirals about the mixing channel from the inlet toward the outlet for mixing and distributing the particulate generally uniformly within the fluid. The stream is directed into the mixing channel of the mixing tip and spiraled along the fin within the mixing channel. The spiraling increases turbulence and mixes the stream into a mixed stream of particulate and fluid. The mixed stream is discharged from the mixing tip for being dispensed onto an anatomical site.

First claim

What is claimed is:

1. An applicator for dispensing a uniform density of a particulate and a fluid for use during a medical procedure, the applicator comprising;
a cannula, the cannula having a distal cannula end portion and a flow channel extending therethrough;
a mixing tip, the mixing tip operatively connected to the distal cannula end portion, the mixing tip further comprising:
a housing having a proximal end portion and a distal end portion;
an inlet positioned at the proximal end portion of the housing, the inlet fluidly connected to the flow channel for receiving a stratified particulate and fluid;
an outlet positioned at the distal end portion of the housing;
a mixing channel extending through the housing from the inlet to the outlet; and
a first fin positioned within the housing and extending along at least a portion of the mixing channel, the first fin having a triangular cross sectional profile that receives a laminar flowing stream of the fluid and the particulate therealong and extending in a spiral shape about the mixing channel and positioned between the inlet and the outlet to increase turbulence within the stream for mixing the particulate and the fluid and distributing the particulate uniformly within the fluid for discharge from the outlet, wherein the triangular cross sectional profile includes a convex face, wherein the convex face extends along a longitudinal length of the first fin,

wherein the applicator is discharges the particulate and the fluid during the medical procedure.

2. The applicator of claim 1 further comprising:
a hub having a fluid inlet port and a particulate inlet port, the fluid inlet port and the particulate inlet port extending through the hub to a fluidizing chamber for receiving the fluid and the particulate; and
the cannula having a proximal cannula end portion, the flow channel extending from the proximal cannula end portion to the distal cannula end portion, the proximal cannula end portion connected to the hub and fluidly connected to the fluidizing chamber for receiving a fluidized particulate and fluid.

3. The applicator of claim 1 wherein the mixing tip further comprises a second fin, the second fin positioned within the housing and extending along at least the portion of the mixing channel, the second fin configured in the spiral shape about the mixing channel and positioned between the inlet and the outlet for mixing the particulate and the fluid and distributing the particulate uniformly within the fluid for discharge from the outlet.

4. The applicator of claim 3 wherein the mixing tip further comprises a third fin, the third fin positioned within the housing and extending along at least the portion of the mixing channel, the third fin configured in the spiral shape about the mixing channel and positioned between the inlet and the outlet for mixing the particulate and the fluid and distributing the particulate uniformly within the fluid for discharge from the outlet,
wherein the first, second, and third fins spiral approximately 120 degrees about the mixing channel from the inlet toward the outlet.

5. The applicator of claim 1 wherein the first fin extends along generally the entire length of the mixing channel from the inlet to the outlet.

6. The applicator of claim 1 wherein the first fin defines at least one groove within the mixing channel, the groove spiraling about the mixing channel adjacent to the first fin for receiving a laminar flowing rivulet of stratified particulate and directing the laminar flowing rivulet into a turbulent flow of fluid, wherein the laminar flowing rivulet mixes with the turbulent flow of fluid to distribute the particulate uniformly within the fluid.

7. The applicator of claim 1 wherein the cannula further includes a malleable distal tube, the mixing tip fluidly connected to the malleable distal tube for bending the malleable distal tube and aiming the mixing tip.

8. The applicator of claim 1 , wherein the triangular cross-sectional profile includes a concave face, the concave face extending along the first fin between the inlet and the outlet such that a groove defined by the concave face is configured to guide and lift the particulate into the increased turbulence within the stream.

9. A mixing tip for generating uniform density of a particulate and a fluid from an applicator for use in a medical procedure, the mixing tip comprising:
a housing having a proximal end portion and a distal end portion;
an inlet positioned at the proximal end portion of the housing, the inlet configured for attaching to the applicator and receiving a stratified particulate and fluid;
an outlet positioned at the distal end portion of the housing;
a mixing channel extending through the housing from the inlet to the outlet; and
a first fin positioned within the housing and extending along at least a portion of the mixing channel, the first fin having a triangular cross sectional profile that receives a laminar flowing stream of the fluid and the particulate therealong and extending in a spiral shape about the mixing channel and positioned between the inlet and the outlet to increase turbulence within the stream for mixing the particulate and the fluid and distributing the particulate uniformly within the fluid for discharge from the outlet, wherein the triangular cross sectional profile includes a convex face, wherein the convex face extends along a longitudinal length of the first fin,
wherein the applicator is discharges the particulate and the fluid during the medical procedure.

10. The mixing tip of claim 9 further comprising a second fin, the second fin positioned within the housing and extending along at least the portion of the mixing channel, the second fin configured in the spiral shape about the mixing channel and positioned between the inlet and the outlet for mixing the particulate and the fluid and distributing the particulate uniformly within the fluid for discharge from the outlet.

11. The mixing tip of claim 10 further comprising a third fin, the third fin positioned within the housing and extending along at least the portion of the mixing channel, the third fin configured in the spiral shape about the mixing channel and positioned between the inlet and the outlet for mixing the particulate and the fluid and distributing the particulate uniformly within the fluid for discharge from the outlet,
wherein the first, second, and third fins spiral approximately degrees about the mixing channel from the inlet toward the outlet.

12. The mixing tip of claim 9 wherein the first fin extends along generally the entire length of the mixing channel from the inlet to the outlet.

13. The mixing tip of claim 9 wherein the first fin defines at least one groove within the mixing channel, the groove spiraling about the mixing channel adjacent to the first fin for receiving a laminar flowing rivulet of stratified particulate and directing the laminar flowing rivulet into a turbulent flow of fluid, wherein the laminar flowing rivulet mixes with the turbulent flow of fluid to distribute the particulate uniformly within the fluid.

14. The mixing tip of claim 9 , wherein the triangular cross-sectional profile includes a concave face, the concave face extending along the first fin between the inlet and the outlet such that a groove defined by the concave face is configured to guide and lift the particulate into the increased turbulence within the stream.

15. A method of dispensing a stream of fluid and a particulate from a cannula during a medical procedure, the stream having a particulate portion having a higher concentration of particulate t

Assignees

• Nordson Corp

Inventors

• Hoogenakker Jon E
• Lou Huadong
• Robb Bradley D

Classifications

• A61M2206/14

  Static flow deviators in tubes disturbing laminar flow in tubes, e.g. archimedes screws · CPC title

• B05B7/1486

  for spraying particulate material in dry state · CPC title

• A61M13/00

  Insufflators for therapeutic or disinfectant purposes {, i.e. devices for blowing a gas, powder or vapour into the body (hand-held units in which gas flow is produced by muscular energy at the moment of use B05B11/062)} · CPC title

• A61M2202/064

  Powder · CPC title

• A61M11/06 Primary

  of the injector type · CPC title