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

With the popularization of the concept of minimally invasive diagnosis and treatment, the puncture technique guided by ultrasound has permeated every corner of clinical practice. The emergence of the echo-tip needle has significantly reduced the blindness of the operation and improved the success rate. This article will systematically explore its application value in six core fields.

I. Establishment of Vascular Access: Reducing the Risk of "Blind Puncture"

Operations such as central venous catheterization and PICC catheterization traditionally relied on anatomical landmarks for positioning, which carried risks of arterial puncture or pneumothorax. With the use of an echo-tip needle, doctors can observe in real time the entire process of the needle tip penetrating the subcutaneous tissue and entering the target vein. The bright needle tip signal can clearly indicate whether the anterior wall of the blood vessel is compressed and whether the needle tip is within the lumen, significantly improving the success rate of the first puncture, especially for obese, edematous, or collapsed blood vessel patients.

II. Regional Anesthesia and Pain Management: Precise Nerve Blockage

In nerve block procedures such as brachial plexus nerve block and sciatic nerve block, the drug solution needs to be precisely injected around the nerve sheath. The echo needle tip can assist anesthesiologists in accurately distinguishing the positional relationship between the needle tip and the nerve on the ultrasound image, avoiding damage caused by intraneural injection. At the same time, by observing the "liquid dark area" formed by the diffusion of the drug solution, the anesthetic effect can be immediately determined, reducing the failure rate of anesthesia and complications.

III. Tumor Diagnosis and Biopsy: Targeted Sampling

For suspicious nodules in the liver, kidneys, thyroid, or breast, ultrasound-guided biopsy is the gold standard for obtaining pathological tissues. The advantage of the echogenic tip needle is that when the needle tip reaches the edge of the lesion, the high-reflective echo signal can clearly show its relative position to the lesion. Doctors can precisely adjust the angle to ensure that the sample is taken from the lesion substance rather than the necrotic area or the surrounding normal tissue, thereby improving the accuracy of pathological diagnosis.

IV. Liquid Drainage and Decompression: Safe and Efficient Needle Insertion

• Thoracic or abdominal fluid drainage: During thoracentesis or paracentesis, it is crucial to accurately avoid the diaphragm, spleen, or intestines. The echo needle tip can continuously track during dynamic respiratory movement, ensuring that the puncture path remains within the safe window.
• Cyst sclerotherapy: For liver cysts and kidney cysts, the echo needle tip can precisely penetrate the center of the cyst, followed by the injection of a sclerosing agent. Clear needle tip imaging avoids the leakage of the sclerosing agent due to needle tip slippage, which could cause abdominal membrane irritation.

V. Interventional Operations on Special Areas

• Renal calyx puncture during percutaneous nephrolithotomy (PCNL): This is one of the challenges in the application of echo needles. With its excellent imaging ability, doctors can precisely identify and puncture the target renal calyx within the urine-filled collecting system, laying a solid foundation for subsequent dilation and creating a passage.
• Amniotic cavity puncture: In prenatal diagnosis, the tip of the echo needle can clearly be seen in the amniotic fluid pool, ensuring that it does not touch the fetal limbs, significantly enhancing the safety of the surgery.

VI. Beyond Visualization: Dual Enhancement of Safety and Efficiency

Overall, the application of the echo-tip needle not only resolves the "invisible" issue but also brings about significant clinical benefits:

• Reduce complications: Avoid damaging vital blood vessels, nerves, and organs.
• Shorten operation time: Reduce the need for repeated attempts to adjust the puncture direction.
• Minimize patient pain: A successful puncture in one attempt means less tissue damage and less psychological stress.

Conclusion

The echo-tip needle has evolved from an "optional tool" to a "standard component" for many interventional procedures. It provides doctors with unprecedented visual confidence and is driving interventional medicine towards greater precision, safety, and humanization.