Cannulas TRIZ Cases

Nested sealing components and dynamic sleeve rotation resolve gas leakage risks in hand-assisted laparoscopic procedures while minimizing device complexity.

A flexible tubular braided sheath expands radially via an insertable expansion tube to create a minimally invasive surgical corridor.

A dual-wings percutaneous needle uses transverse and longitudinal position wings to orient the sampling shaft.

Segmented geometry and non-stainless steel surfaces reduce agent adsorption and prevent reflux, ensuring efficient delivery of biologically active materials.

A medical irrigation device uses a barrier shroud to contain fluid and tissue debris during debridement procedures.

A surgical access device features a rotatable housing that enables flexible instrument positioning through a single port.

A valve system and wick mechanism manage fluid insertion and absorption to resolve cleaning accessibility challenges in sealed surgical instruments.

Decoupled jacket segments reduce strain on the medical needle assembly, preventing rupture while maintaining vacuum seal integrity.

A wound cleansing apparatus recirculates exudate through a selectively permeable membrane to retain beneficial growth factors.

A braided wire conduit guide expands to accommodate large medical devices while maintaining a small insertion profile, reducing tissue damage during tunneling.

Resilient membranes dilate around instruments while maintaining a tortuous path that prevents gas leakage and sustains pneumoperitoneum.

An elastic fixing ring adapts its inner diameter to secure medical ports across varying tissue sizes, resolving instability from fixed-size designs.

A transapical delivery system enables minimally invasive heart valve implantation through small incisions without extracorporeal bypass.

A self-rolling tractor tube inverts over itself to draw clots into the lumen without internal support.

A tubular access port uses a retractable needle to hook biological membranes.

Angled tube connections prevent detachment during movement while enabling continuous pressure measurement in small body cavities.

A retrieval device uses a rotatable inner member to actuate snare coils for precise specimen capture.

Segmented positioning assemblies restrain avian birds in flight-replicated postures, resolving access bottlenecks for vaccination and evaluation tasks.

An integrated guide member directs fluid flow through tube openings, resolving the trade-off between injection efficiency and device complexity.

Lateral flexible channels provide multiple degrees of freedom for instruments, resolving the trade-off between single port access and large skin incision size.

A robotic end effector with moveable flutes and a rotating collar mechanism adjusts its internal diameter to accommodate surgical tools of varying sizes.

A minimally invasive method replaces aortic valves using robotic tools inserted through small chest ports.

Integral longitudinal members within coaxial cylinders prevent clamping and friction, enhancing steering control in endoscopic applications.

An insertion tube with articulated sections and a control ribbon navigates complex sinus anatomy while maintaining structural stability.

A cannula obturator channel directs insufflation fluid and instruments to eliminate separate sealing members and reduce procedural complexity.

Segmented valves and an insert seal varying diameter shafts, preventing gas leakage during minimally invasive surgery.

A spring-loaded latch engages the end sealing piece to stop reverse movement, while a loose switch allows controlled detachment for maintenance.

A pivotable holder enables longitudinal displacement and rotation of surgical instruments.

A flexible hollow cannula navigates the natural sinus opening to deliver a grinding wire for material extraction.

A coaxial surgical clamp assembly uses spring-biased elements to deploy clamping and cutting functions through a single small port.

A balloon cannula uses a pre-filled fluid chamber and sliding collars to transfer liquid for inflation.

A multi-channel cannula integrates a main guide tube and an accessory guide tube attached to its outer wall for simultaneous device insertion.

Multiple chambers in angioplasty balloons reduce elongation and enhance refolding to minimize trauma to healthy tissue during removal.

An elastically yieldable bowl element deforms under pressure to create vacuum lift for the abdominal wall during laparoscopic surgery.

Retractable elongate tissue anchor prevents cannula migration during biopsy procedures, ensuring precise instrument positioning without repeated repositioning.

A laparoscopic access device employs a resilient diaphragm and ratchet-pawl lock to maintain pneumoperitoneum while allowing adjustable passage sizes.

A surgical probe with a rotating wire loop cuts and aspirates tissue through small openings.