Application Of Echogenic Needles In Chronic Neuralgia Precision Pain Management

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

1. Clinical Pain Points

Chronic neuralgia such as postherpetic neuralgia, limb neuralgia and trigeminal branch neuralgia requires long-term and precise nerve block pain management. Traditional pain treatment mainly relies on drug conservative treatment and ordinary needle blind block, with prominent clinical defects. Long-term oral analgesic drugs have large systemic side effects, easy to cause liver and kidney damage and drug dependence. Ordinary puncture needles have poor positioning accuracy, unable to accurately target lesion nerve branches, resulting in short analgesia duration and easy recurrence of pain. For tiny and deep lesion nerve branches, traditional ultrasound single guidance is difficult to distinguish nerve tissues from surrounding scar adhesion tissues, leading to inaccurate drug injection position, poor treatment effect, and multiple repeated treatments required, increasing patient pain and economic burden.

2. Working Principle of Echogenic Nerve Block Needles

Echogenic nerve block needles realize precise targeted treatment of chronic neuralgia based on dual precise positioning technology. The high-sensitivity echo enhancement structure makes the needle tip form ultra-clear imaging under high-frequency ultrasound, which can accurately identify tiny lesion nerve branches and distinguish them from scar tissues and adhesive fascia, realizing precise visual positioning of micro-lesions. The electrical nerve stimulation technology can induce weak nerve electrical signals for tiny lesion nerves. By adjusting the stimulation current intensity, clinicians can accurately judge the activity and position of lesion nerves, realize precise locking of pain-causing nerve points. The dual positioning mode eliminates the interference of scar tissues and inflammatory hyperplasia tissues, ensures that the needle tip accurately reaches the lesion nerve area, and realizes targeted injection of analgesic drugs, maximizing the treatment effect of nerve block.

3. Equipment Classification and Adaptive Scenarios

For chronic neuralgia pain management, echogenic needles are mainly ultra-fine high-precision specifications (24G-26G) and micro-enhanced specifications (22G). The 24G-26G ultra-fine echogenic needles are suitable for superficial tiny neuralgia such as facial trigeminal branch neuralgia and finger end neuralgia, with minimal tissue trauma, no secondary damage to normal nerve tissues, and suitable for repeated minimally invasive treatment. The 22G micro-enhanced echogenic needles are used for deep chronic neuralgia such as thoracic and lumbar branch neuralgia and limb deep residual neuralgia, with stronger echo penetration and stable positioning effect in inflammatory proliferative tissues. All products adopt ultra-smooth electropolishing treatment, reducing tissue adhesion during repeated puncture, and are suitable for long-term repeated pain management treatment.

4. Standard Operational Guidelines

Before treatment, combine the patient's pain site and imaging examination results to locate the lesion nerve range, select ultra-fine matched echogenic needle specifications. Use high-frequency ultrasound probe to scan the pain area in detail, mark the distribution of lesion nerve branches and surrounding scar adhesive tissues. Adopt micro-invasive in-plane puncture technique, advance the ultra-fine echogenic needle slowly at a uniform speed, and observe the needle tip trajectory in real time under high-definition ultrasound images. Turn on the low-intensity nerve stimulation mode, fine-tune the needle position until weak targeted nerve induction reaction appears, confirm the accurate positioning of the lesion nerve. Inject low-concentration long-acting local anesthetic and neurotrophic drugs in micro-dosage batches, observe the uniform infiltration of drugs around the lesion nerve, withdraw the needle slowly after confirming no adverse reactions, and complete the precise block treatment.

5. Practical Clinical Experience

Clinical application shows that echogenic nerve block needles have excellent therapeutic effect in chronic neuralgia management. Compared with ordinary needle treatment, the precise positioning ability greatly improves the accuracy of lesion nerve targeting, the one-time treatment effective rate increases from 68% to 92%, and the pain recurrence rate decreases by more than 65%. The ultra-fine needle body design causes almost no traumatic damage to normal tissues and nerves, with low postoperative adverse reaction rate and high patient comfort. For intractable chronic neuralgia that is ineffective in conventional drug treatment, echogenic needle precise nerve block can effectively block pain signal transmission, prolong the analgesia cycle, and reduce the frequency of repeated treatment. Long-term follow-up shows that standardized treatment with echogenic needles can significantly improve the neuralgia symptoms of patients, improve sleep quality and daily living ability, and reduce the dependence on oral analgesics.

6. Summary and sublimation

Chronic neuralgia is characterized by long course, easy recurrence and difficult treatment, and traditional treatment methods have defects such as large side effects and poor precision. The core difficulty of treatment lies in the accurate positioning of tiny lesion nerves and targeted drug delivery. Echogenic nerve block needles rely on high-precision dual-mode positioning technology to break through the bottleneck of difficult positioning of lesion nerves covered by scar and inflammatory tissues. It realizes minimally invasive, accurate and efficient nerve block treatment, reduces drug side effects and treatment recurrence rate, and provides a new precise treatment path for intractable chronic neuralgia. It has important clinical value for improving the quality of life of chronic pain patients.

7. Future Application Prospects and Suggestions

With the continuous improvement of people's demand for pain management quality, precise minimally invasive treatment of chronic neuralgia has become a hot spot in pain medicine. It is suggested to further promote the popularization of echogenic needle precise nerve block technology in specialized pain departments, formulate individualized treatment schemes for different types of chronic neuralgia. Optimize product ultra-fine needle body technology, improve the echo recognition ability of micro-nerve branches, and develop special needles for facial and spinal tiny nerve block. At the same time, strengthen the combination of technology and rehabilitation treatment, explore the long-term curative effect of echogenic needle nerve block combined with neurotrophic therapy, and further improve the clinical treatment level of chronic intractable pain.