Bone Marrow Aspiration Adaptor for Spinal Surgery

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Solution Overview

Problem

The harvesting of autograft bone marrow during spinal surgery is associated with a high complication rate and can cause chronic pain, limiting the effectiveness and safety of spinal arthrodesis procedures.

Innovation Solution

A bone marrow aspiration adaptor that can be integrated with existing spinal surgical instrumentation, allowing for transpedicular aspiration of marrow cells without removing existing pedicle screws or K-wires, using a distal and proximal interface with a lumen and seal to facilitate safe and quick harvesting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If autograft bone marrow is harvested during spinal surgery, then bone graft quality is improved, but complication rate and morbidity increase

Engineering Contradiction:

Improvebone graft qualityVSAvoidcomplication rate and morbidity

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The invention separates the bone marrow aspiration function from traditional harvesting methods by using a dedicated adaptor assembly that can be attached to existing spinal instrumentation. This allows selective extraction of bone marrow without the need for extensive additional surgical sites or more invasive harvesting procedures, thereby reducing complications while maintaining graft quality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The adaptor assembly acts as an intermediary device between the existing spinal instrumentation and the bone marrow aspiration system. It includes a proximal interface member that connects to the surgical tool and a distal interface member that interfaces with the bone, with a seal that creates a fluid-tight connection. This intermediary structure enables safe and effective bone marrow harvesting without requiring removal of existing instrumentation or creating additional harmful surgical sites.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Quantity of substance

If traditional bone harvesting methods are used, then bone graft is obtained, but surgical time and complexity increase

Engineering Contradiction:

Improvebone graftVSAvoidsurgical time

Core Design Contradiction:

Quantity of substanceVSLoss of time

Solution Approach 1:

The invention merges the bone marrow aspiration function with existing spinal surgical instrumentation by using an adaptor that attaches to the same tools used for pedicle screw insertion and K-wire placement. This integration eliminates the need for separate harvesting procedures and allows bone graft acquisition during the same surgical steps already performed, significantly reducing surgical time and complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The adaptor assembly is designed to be universally compatible with existing spinal surgical instrumentation, including pedicle screw drivers and K-wire inserters. The proximal interface member can connect to various surgical tools, and the same instrumentation pathway is used for both instrument insertion and bone marrow aspiration, making the system multi-functional and eliminating the need for additional specialized equipment or procedures.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of operation

If existing instrumentation is removed for bone marrow harvesting, then aspiration can be performed, but surgical stability and time are compromised

Engineering Contradiction:

Improveaspiration accessVSAvoidspinal fixation stability

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The invention uses a nested structure where the adaptor assembly is inserted within the existing spinal instrumentation pathway. The distal interface member with the seal is positioned inside the lumen of the surgical tool, and the bone marrow aspiration catheter is nested within the adaptor. This nested configuration allows aspiration access without requiring removal of the external fixation instrumentation, maintaining spinal stability throughout the procedure.

Inventive Principle:

Principle #7Nested doll (Nesting)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Significantly reduces complications and morbidity, enabling safer and quicker bone graft harvesting while maintaining the stability of spinal fixation instrumentation.

Implementation Method 1

a seal disposed in the distal interface member inside the lumen

Methodology Applied

Scientific EffectSealing:

Implementation Method 2

bone marrow aspiration adaptor including a distal interface member and a proximal interface member, which extend in opposite directions from a body, wherein a lumen extends through the distal interface member and the proximal interface member

Methodology Applied

Scientific EffectAspiration: Suction

Data Source

PatentUS11026735B2Bone marrow aspiration adaptor assembly

Publication Date: 2021.06.08 PREMIA SPINE

AI summary

An assembly includes a bone marrow aspiration adaptor (10), which includes a distal interface member (12) and a proximal interface member (14), which extend in opposite directions from a body (16). A lumen (18) extends through the distal interface member (12) and the proximal interface member (14). The proximal interface member (14) includes a fluid connector (22). A seal (24) is disposed in the distal interface member (12) inside the lumen (18).