# US 8,540,745 B2 · Balloon dissector with cannula

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- Number: US 8,540,745 B2
- Document ID: US8540745B2
- Status: Granted
- Kind: B2
- Application number: 13/716,571
- Filed: 2012-12-17
- Published: 2013-05-02
- Granted: 2013-09-24
- Earliest claimed: 2002-10-04
- Assignees: Covidien LP
- Applicants: Covidien LP
- Inventors: Christopher Criscuolo; Brian Creston; Ernest Aranyi; Robert Geiste
- Web page: https://patentgrep.com/patent/US8540745B2

## CPC

- A61B 17/32: Surgical cutting instruments ({A61B18/042 takes precedence; suture cutters A61B17/0467;} implements for ligaturing and cutting {A61B17/122, A61B17/12; instruments for rupturing the amniotic membrane A61B17/4208; specially adapted knives for eye surgery A61F9/0133})
- A61B 17/0218: {for minimally invasive surgery (A61B17/0281, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence)}
- A61B 17/3417: {Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating (syringe needles A61M5/32; dilators A61M29/00)}
- A61B 17/3474: {Insufflating needles, e.g. Veress needles}
- A61B 17/3496: {Protecting sleeves or inner probes; Retractable tips (for protecting body piercing guide needles A61M25/0612)}
- A61B 2017/00477: {Coupling (A61B2017/0046 takes precedence)}
- A61B 2017/00557: {inflatable (A61B2017/22051 takes precedence)}
- A61B 2017/320048: {Balloon dissectors}
- A61B 2017/347: {Locking means, e.g. for locking instrument in cannula}
- A61B 2017/3486: {Balloon}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

There are disclosed various embodiments of a balloon dissector and balloon tip cannula assembly which are provided to facilitate forming an anatomical space within the body, such as, for example, an anatomical space in the abdominal cavity or extraperitoneal space for facilitating hernia repair surgeries. The balloon dissector and balloon tip cannula assembly generally includes a balloon tip cannula assembly for anchoring the device to the abdominal wall and a balloon dissector assembly having a dissection balloon at a distal end for separating apart tissue layers and forming an anatomical space. Various structures are provided to connect the balloon dissector assembly to the balloon tip cannula assembly. Obturators associated with the balloon dissector assembly and the balloon tip cannula assembly may also be provided. The balloon dissector and balloon tip cannula assembly may also include a scope support for insertion through the balloon dissector assembly and dissection balloon and for receipt of an endoscope to view the procedure from within the balloon. Various combinations of valve ports and sub-assemblies are disclosed for providing inflation fluid to the balloon tip cannula assembly, insufflation fluid for the abdominal cavity and inflation fluid for the dissection balloon.

## Claims

### Claim 1

A combined dissector and cannula assembly comprising:
a dissector assembly including a dissector housing, a rigid tube extending distally from the dissector housing, a dissection balloon attached to a distal end of the tube, and a dissector obturator insertable through the tube, the dissection balloon defining a chamber in communication with the tube; and
a cannula assembly having a cannula housing, an access cannula extending distally from the cannula housing, the access cannula defining an access lumen, and a cannula obturator insertable through the access cannula, the access lumen is configured and dimensioned to receive the tube and the dissection balloon therethrough, wherein the cannula housing includes an attaching structure configured to selectively and individually secure the cannula obturator to the cannula housing when the cannula obturator is assembled to the cannula assembly and secure the dissector housing to the cannula housing when the dissector housing is alternatively assembled to the cannula assembly.

### Claim 2 (depends on 1)

The combined dissector and cannula assembly according to claim 1, wherein the attaching structure is a recess.

### Claim 3 (depends on 2)

The combined dissector and cannula assembly according to claim 2, wherein the dissector housing includes a latch configured to be detachably secured with the recess.

### Claim 4 (depends on 3)

The combined dissector and cannula assembly according to claim 3, wherein the latch is biased towards an engagement position with the recess.

### Claim 5 (depends on 2)

The combined dissector and cannula assembly according to claim 2, wherein the cannula obturator includes a latch configured to be detachably secured with the recess.

### Claim 6 (depends on 5)

The combined dissector and cannula assembly according to claim 5, wherein the latch is biased towards an engagement position with the recess.

### Claim 7 (depends on 1)

The combined dissector and cannula assembly according to claim 1, wherein one of the dissector housing and the dissector obturator has a latch and the other one of the dissector housing and the dissector obturator has a recess configured to detachably engage the latch.

### Claim 8 (depends on 7)

The combined dissector and cannula assembly according to claim 7, wherein the one of the dissector housing and the dissector obturator having a latch has a button configured to disengage the latch from the recess.

### Claim 9 (depends on 1)

The combined dissector and cannula assembly according to claim 1, wherein the cannula housing includes an insufflation port in communication with the access lumen.

### Claim 10 (depends on 9)

The combined dissector and cannula assembly according to claim 9, wherein the access cannula includes an anchor balloon.

### Claim 11 (depends on 1)

The combined dissector and cannula assembly according to claim 1, wherein the cannula assembly includes a movable locking assembly having a foam pad and a lock mechanism that is slidably mounted on the access cannula to secure the cannula assembly in an abdominal wall.

### Claim 12 (depends on 1)

The combined dissector and cannula assembly according to claim 1, wherein the dissector housing has an inflation port in communication with the chamber of the dissection balloon.