https://www.nature.com/articles/s41598-024-72620-8

Core Perspective: With a forward-looking vision, this paper discusses prospective technical development directions for ultrasound echogenic needles, including intelligentization, advanced novel materials, multifunctional integration and artificial intelligence synergy.

Driven by continuous advances in medical imaging and materials science, ultrasound echogenic needles are undergoing constant technological evolution. Next-generation devices will no longer function merely as passive visualization tools; instead, they will evolve into intelligent terminals integrating sensing, therapeutic actuation and data communication capabilities.

I. Material Innovation: Toward Superior Biocompatibility and Multifunctionality

• Biodegradable Materials: Research is underway to fabricate partial or full needle structures using bioabsorbable polymers, magnesium alloys and other degradable biomaterials. After completing targeted tasks such as localized sustained drug delivery, these needles gradually degrade and are metabolized inside the body, eliminating the pain and risks of secondary needle removal. They are especially suitable for short-term implant applications.
• Composite Coating Technology: Future coatings will deliver far more than echo enhancement alone. They can be infused with antimicrobial agents to mitigate catheter-associated infections, or loaded with growth factors and chemotherapeutic drugs to deliver localized therapy concurrently with puncture, realizing integrated diagnosis and treatment. Multi-layer coating architectures enable gradient functional performance: the outer layer boosts echogenicity, while inner layers optimize lubrication or release bioactive substances.

II. Intelligence and Sensor Integration: Enabling the Needle to Transmit Real-Time Tissue Feedback

• Pressure and Force Sensing: Miniature optical fiber or MEMS (Micro-Electro-Mechanical System) pressure sensors are embedded within the needle tip or shaft. During procedures, clinicians not only visualize the tip position via ultrasound but also receive tactile data reflecting tissue stiffness and resistance shifts. When the tip contacts vascular walls, neural bundles or tumor capsules, the system delivers haptic or audible alerts, further elevating procedural precision and safety.
• Electrophysiological Signal Detection: The needle tip is engineered as a microelectrode to capture real-time electrophysiological signatures of surrounding tissue, such as neural discharge and myoelectric potentials. For surgeries including nerve blocks and deep brain stimulation, this provides supplementary validation to confirm accurate placement within target functional tissue zones.

III. Automation and Robotic Assistance: Progress Toward One-Click Automated Puncture

• Electromagnetic/Optical Tracking: Echogenic ultrasound needles are paired with electromagnetic positioning or optical navigation systems. The platform calculates real-time three-dimensional coordinates of the needle tip and overlooks this positional data onto pre-operative CT/MRI scans to deliver multimodal image fusion navigation. Clinicians maintain precise control even under suboptimal ultrasound image quality.
• Robot-Assisted Puncture: Future echogenic needles will interface with interventional puncture robots. Robotic manipulators autonomously adjust insertion angle and penetration depth following pre-planned trajectories, while clinicians supervise and validate operations from a control console. This eliminates positional errors caused by hand tremor, enabling submillimeter ultra-precise cannulation.

IV. AI Empowerment: Advancing from Visibility to Interpretability

Artificial intelligence will assume an increasingly critical role in the clinical deployment of echogenic ultrasound needles.

• Intelligent Recognition and Path Recommendation: AI algorithms analyze ultrasound frames in real time, automatically pinpointing the needle tip, forecasting its advancing trajectory, and color-coding high-risk anatomical structures (blood vessels, nerves) lying ahead. Based on the anatomical features of target lesions, the system can even recommend optimal skin entry points and insertion pathways for clinicians.
• Performance Assessment and Clinical Training: AI objectively evaluates operator proficiency by quantifying metrics such as tip trajectory smoothness and target hit rate. It provides standardized quantitative feedback for resident physician training programs, accelerating the cultivation of skilled interventional practitioners.

Conclusion

The developmental timeline of ultrasound echogenic needles-from basic visibility, to sharp high-definition visualization, to future intelligent interpretability and autonomous decision-making-epitomizes the overall advancement of minimally invasive interventional medicine. Fueled by deep cross-industry integration of advanced biomaterials, microelectronics, robotics and artificial intelligence, next-generation echogenic needles will deliver heightened intelligence, safety and efficiency, bringing substantial benefits to global healthcare and patient well-being.