Prospective evaluation of a novel device for ultrasound-guided percutaneous treatment of carpal tunnel and trigger finger disease. Efficacy and safety of sono-instruments®.

PURPOSE: To evaluate the safety and effectiveness of percutaneous release procedures under sonography using Sono-Instruments® in the treatment of carpal tunnel syndrome (CTS) and trigger finger (TF). METHODS: Prospective study involving 30 patients, divided into two groups (15 CTS, and 15 TF). The primary outcomes were surgical performance-related outcomes (visibility, ease of use, satisfaction, duration) using Sono-Instruments® and patient-related outcomes (pain, activity limitations, time to return to work, functional scores). Secondary outcomes included complications. Patients were followed for two months post-operatively. RESULTS: In the CTS group, the average age of the patients was 58.7 years. The percutaneous release of the transverse carpal ligament was effectively completed in all cases, with excellent device performance and no adverse events. At one week, all patients could wash their hands, 80% could perform activities of daily living, and 80% of those working had returned to their activities. At two months, all patients had resumed all activities. Pillar pain was still present in 53.3%. In the TF group, the patients had an average age of 57.9 years. The percutaneous release of the A1 annular pulley was successful in all cases, with excellent device performance and no adverse events. At one week, all patients could wash their hands, 93.3% could do all activities of daily living, and 75% of those working were back to their professional activities. At two months, all patients were back to all activities of daily living and work. The DASH score was significantly improved at two months, compared to preoperative, for both groups (p < 0.001). CONCLUSION: Percutaneous sono-guided release using Sono-Instruments® is safe and efficient, and associated with quick functional recovery. LEVEL OF EVIDENCE: II.

An 8 mm endoscopic histotripsy array with integrated high-resolution ultrasound imaging.

An 8 mm diameter, image-guided, annular array histotripsy transducer was fabricated and characterized. The array was laser etched on a 5 MHz, 1-3 dice and fill, PZT-5H/epoxy composite with a 45 % volume fraction. Flexible PCBs were used to electrically connect to the array elements using wirebonds. The array was backed with a low acoustic impedance epoxy mixture. A 3.6 by 3.8 mm, 64-element, 30 MHz phased array imaging probe was positioned in the center hole, to co-align the imaging plane with the bubble cloud produced by the therapy array. A custom 16-channel high voltage pulse generator was used to test the annular array for focal lengths ranging from 3- to 8-mm. An aluminum lens-focussed transducer with a 7 mm focal length was fabricated using the same piezocomposite and backing material and tested along with the histotripsy array. Simulated results from COMSOL FEM models were compared to measured results for low voltage characterization of the array and lens-focussed transducer. The measured transmit sensitivity of the array ranged from 0.113 to 0.167 MPa/V, while the lens-focussed transducer was 0.192 MPa/V. Simulated values were 0.160 to 0.174 MPa/V and 0.169 MPa/V, respectively. The measured acoustic fields showed a significantly increased depth-of-field compared the lens-focussed transducer, while the beamwidths of the array focus were comparable to the lens. The measured cavitation voltage in water was between 254 V and 498 V depending on the focal length, and 336 V for the lens-focussed transducer. The array had a lower cavitation voltage than the lens-focussed transducer for a comparable operating depth. The histotripsy array was tested in a tissue phantom and an in vivo rat brain. It was used to produce an elongated lesion in the brain by electronically steering the focal length from 3- to 8-mm axially. Real time ultrasound imaging with a Doppler overlay was used to target the tissue and monitor ablation progress, and histology confirmed the targeted tissue was fully homogenized.

Needle­based gastrocnemius lengthening: a novel ultrasound­guided noninvasive technique: part II-clinical results.

BACKGROUND: Isolated gastrocnemius contracture has been associated with more than 30 lower limb disorders, including plantar heel pain/plantar fasciitis, Achilles tendinosis, equinus foot, adult flatfoot, and metatarsalgia. Although many techniques are available for gastrocnemius recession, potential anesthetic, cosmetic, and wound-related complications can lead to patient dissatisfaction. Open and endoscopic recession techniques usually require epidural or general anesthesia, exsanguination of the lower extremities and stitches and can damage the sural nerve, which is not under the complete control of the surgeon at all stages of the procedure. The purpose of this study is to evaluate the clinical results of a surgical technique for gastrocnemius lengthening with a needle, as previously described in cadaver specimens. METHODS AND RESULTS: We performed a prospective study of ultrasound-guided gastrocnemius tendon lengthening in level II using a needle in 24 cases (19 patients) of gastrocnemius contracture. The study population comprised 12 males and 7 females. Mean age was 41 years (18-64). All but 5 recessions were bilateral and occurred simultaneously. The indication for the procedure was gastrocnemius contracture; although the patients also presented other conditions such as non-insertional Achilles tendinopathy in 6 patients (2 were bilateral), insertional Achilles calcifying enthesitis in 4 (1 was bilateral), metatarsalgia in 4, flexible flat foot in 1 and plantar fasciitis in 5 (2 were bilateral). The inclusion criteria were the failure of a previous conservative protocol, that the Silfverskiöld test was positive, and that the pathology suffered by the patient was within the indications for surgical lengthening of the patients and were described in the scientific literature. The exclusion criteria were that the inclusion criteria were not met, and patients with surgical risk ASA 3 or more and children. In these patients, although possible, it is preferable to perform the procedure in the operating room with monitoring, as well as in children since they could be agitated during the procedure at the office. We used the beveled tip of an Abbocath needle as a surgical scalpel. All patients underwent recession of the gastrocnemius tendon, as in an incomplete Strayer release. We evaluated pre- and postoperative dorsiflexion, outcomes, and procedural pain (based on a visual analog scale and the American Orthopedic Foot and Ankle Society scores), as well as potential complications. No damage was done to the sural bundle. RESULTS: Ankle dorsiflexion increased on average by 17.89°. The average postoperative visual analog score for pain before surgery was 5.78, 5.53 in the first week, 1.89 at 1 month, and 0.26 at 3 months, decreasing to 0.11 at 9 months. The mean postoperative American Orthopedic Foot and Ankle Society Ankle-Hindfoot score the average was 50.52 before surgery, 43.42 at 1 week, 72.37 at 1 month, 87.37 at 3 months, and 90.79 at 9 months. CONCLUSION: Ultrasound-guided needle lengthening of the gastrocnemius tendon is a novel, safe, and effective technique that enables the surgeon to check all the structures clearly, thus minimizing the risk of neurovascular damage. The results are encouraging, and the advantages of this approach include absence of a wound and no need for stitches. Recovery is fast and relatively painless. A specific advantage of ultrasound-guided needle lengthening of the gastrocnemius tendon is the fact that it can be performed in a specialist's office, with a very basic instrument set and local anesthesia, thus reducing expenses.

From teaching to practice: Evaluating the impact of an upper-limb ultrasound surgery diploma on surgical practice.

OBJECTIVES: This study evaluates the impact of an upper-limb ultrasound surgery diploma on surgical practices, specifically assessing how this specialized training influences the adoption and application of ultrasound techniques in upper limb surgeries. MATERIAL AND METHODS: A comprehensive survey was conducted from August to November 2023, targeting individuals who completed the upper-limb ultrasound surgery diploma program between 2013 and 2023. The survey, distributed online, comprised 31 questions spanning demographic information, professional background, specifics about the diploma program, motivations for pursuing the diploma, post-diploma practices, challenges faced, and financing of ultrasound equipment. RESULTS: Out of the 181 actually receiving the questionnaire. 94 (52%) completed the survey. The results showed an increase in ultrasound-guided interventions from 14.9% to 47.9% post-diploma. The diploma significantly influenced diagnostic ultrasound usage, though not statistically significant (35.3%-74.5%). The primary motivation for pursuing the diploma was the desire to embrace innovation (76.6%). Post-diploma, over half of the graduates observed a positive impact on patient recruitment. Challenges included lack of confidence and time constraints. Over 56% of graduates planned to increase their ultrasound-guided surgery practice. Net Promoter Score of the ultrasound interventions practices was 54.8. CONCLUSION: The study demonstrates the considerable impact of the upper-limb ultrasound surgery diploma on surgical practices, notably in increasing the adoption and application of ultrasound-guided techniques. It highlights the importance of specialized training in adapting to technological advancements and enhancing patient care, suggesting directions for future surgical education and clinical practice integration.

Sección del ligamento transverso del carpo de forma percutánea ecoguiada vs. cirugía abierta para el tratamiento quirúrgico del síndrome del túnel del carpo (STC) / Percutaneous ultrasound-guided section of the transverse carpal ligament vs open surgery for the surgical treatment of carpal tunnel syndrome (CTS)

Antecedentes y objetivo: El gold standard del tratamiento del síndrome del túnel carpiano (STC) es la sección del ligamento transverso del carpo, siendo la técnica más común la incisión cutánea palmar. Se han desarrollados técnicas percutáneas, aunque su relación riesgo/beneficio sigue siendo controvertida. Objetivo: Analizar el resultado funcional de los pacientes intervenidos de STC de forma percutánea ecoguiada y compararlo con cirugía abierta. Material y método: Estudio de cohortes observacional prospectivo de 50 pacientes intervenidos de STC (25 percutáneos con técnica Walant y 25 por cirugía abierta con anestesia local y manguito de isquemia). La cirugía abierta se realizó mediante una incisión palmar corta. La técnica percutánea se realizó de forma anterógrada utilizando el bisturí Kemis® H3 (Newclip). Se realizó una valoración preoperatoria y postoperatoria a las dos semanas, seis semanas y tres meses. Se recogieron datos demográficos, presencia de complicaciones, fuerza de prensión y puntuación del test de Levine (BCTQ). Resultados: La muestra consta de 14 hombres y 36 mujeres con edad media de 51,4 años (IC 95%: 48,4-54,5). Todos los pacientes mejoraron de su clínica de STC sin obtener diferencias estadísticamente significativas en la puntuación BCTQ, ni en la presencia de complicaciones (p > 0,05). Los pacientes intervenidos de forma percutánea recuperaron más rápida la fuerza de prensión a las seis semanas, pero fue similar en la revisión final. Conclusiones: En vista de los resultados obtenidos, la cirugía percutánea ecoguiada es una buena alternativa para el tratamiento quirúrgico del STC. Esta técnica requiere su curva de aprendizaje y familiarización con la visualización ecográfica de las estructuras anatómicas a tratar.(AU)

Background and objective: The gold standard of carpal tunnel syndrome (CTS) treatment is the section of the transverse carpal ligament, the most common technique being the palmar cutaneous incision. Percutaneous techniques have been developed, although their risk/benefit ratio remains controversial. Objective: To analyze the functional outcome of patients undergoing CTS percutaneously ultrasound-guided and compare it with those of open surgery. Material and method: Prospective observational cohort study of 50 patients undergoing CTS (25 percutaneous with WALANT technique and 25 by open surgery with local anesthesia and tourniquet). Open surgery was performed using a short palmar incision. The percutaneous technique was performed anterograde using the Kemis® H3 scalpel (Newclip). A preoperative and postoperative assessment was performed at 2 weeks, 6 weeks and 3 months. Demographic data, presence of complications, grip strength and Levine test score (BCTQ) were collected. Results: The sample consists of 14 men and 36 women with a mean age of 51.4 years (95% CI: 48.4-54.5). Percutaneous technique was performed anterograde using the Kemis® H3 scalpel (Newclip). All patients improved from their CTS clinic without obtaining statistically significant differences in BCTQ score, nor in the presence of complications (p> 0.05). Patients operated on percutaneously recovered faster grip strength at 6 weeks, but it was similar in the final review. Conclusions: In view of the results obtained, percutaneous ultrasound-guided surgery is a good alternative for the surgical treatment of CTS. Logically, this technique requires its learning curve and familiarization with the ultrasound visualization of the anatomical structures to be treated.(AU)

[Translated article] Percutaneous ultrasound-guided section of the transverse carpal ligament vs. open surgery for the surgical treatment of carpal tunnel syndrome (CTS) / Sección del ligamento transverso del carpo de forma percutánea ecoguiada vs. cirugía abierta para el tratamiento quirúrgico del síndrome del túnel del carpo (STC)

Antecedentes y objetivo: El gold standard del tratamiento del síndrome del túnel carpiano (STC) es la sección del ligamento transverso del carpo, siendo la técnica más común la incisión cutánea palmar. Se han desarrollados técnicas percutáneas, aunque su relación riesgo/beneficio sigue siendo controvertida. Objetivo: Analizar el resultado funcional de los pacientes intervenidos de STC de forma percutánea ecoguiada y compararlo con cirugía abierta. Material y método: Estudio de cohortes observacional prospectivo de 50 pacientes intervenidos de STC (25 percutáneos con técnica Walant y 25 por cirugía abierta con anestesia local y manguito de isquemia). La cirugía abierta se realizó mediante una incisión palmar corta. La técnica percutánea se realizó de forma anterógrada utilizando el bisturí Kemis® H3 (Newclip). Se realizó una valoración preoperatoria y postoperatoria a las dos semanas, seis semanas y tres meses. Se recogieron datos demográficos, presencia de complicaciones, fuerza de prensión y puntuación del test de Levine (BCTQ). Resultados: La muestra consta de 14 hombres y 36 mujeres con edad media de 51,4 años (IC 95%: 48,4-54,5). Todos los pacientes mejoraron de su clínica de STC sin obtener diferencias estadísticamente significativas en la puntuación BCTQ, ni en la presencia de complicaciones (p > 0,05). Los pacientes intervenidos de forma percutánea recuperaron más rápida la fuerza de prensión a las seis semanas, pero fue similar en la revisión final. Conclusiones: En vista de los resultados obtenidos, la cirugía percutánea ecoguiada es una buena alternativa para el tratamiento quirúrgico del STC. Esta técnica requiere su curva de aprendizaje y familiarización con la visualización ecográfica de las estructuras anatómicas a tratar.(AU)

Background and objective: The gold standard of carpal tunnel syndrome (CTS) treatment is the section of the transverse carpal ligament, the most common technique being the palmar cutaneous incision. Percutaneous techniques have been developed, although their risk/benefit ratio remains controversial. Objective: To analyze the functional outcome of patients undergoing CTS percutaneously ultrasound-guided and compare it with those of open surgery. Material and method: Prospective observational cohort study of 50 patients undergoing CTS (25 percutaneous with WALANT technique and 25 by open surgery with local anesthesia and tourniquet). Open surgery was performed using a short palmar incision. The percutaneous technique was performed anterograde using the Kemis® H3 scalpel (Newclip). A preoperative and postoperative assessment was performed at 2 weeks, 6 weeks and 3 months. Demographic data, presence of complications, grip strength and Levine test score (BCTQ) were collected. Results: The sample consists of 14 men and 36 women with a mean age of 51.4 years (95% CI: 48.4-54.5). Percutaneous technique was performed anterograde using the Kemis® H3 scalpel (Newclip). All patients improved from their CTS clinic without obtaining statistically significant differences in BCTQ score, nor in the presence of complications (p> 0.05). Patients operated on percutaneously recovered faster grip strength at 6 weeks, but it was similar in the final review. Conclusions: In view of the results obtained, percutaneous ultrasound-guided surgery is a good alternative for the surgical treatment of CTS. Logically, this technique requires its learning curve and familiarization with the ultrasound visualization of the anatomical structures to be treated.(AU)

[Translated article] Percutaneous ultrasound-guided section of the transverse carpal ligament vs. open surgery for the surgical treatment of carpal tunnel syndrome (CTS).

BACKGROUND AND OBJECTIVE: The gold standard of carpal tunnel syndrome (CTS) treatment is the section of the transverse carpal ligament, the most common technique being the palmar cutaneous incision. Percutaneous techniques have been developed, although their risk/benefit ratio remains controversial. OBJECTIVE: To analyse the functional outcome of patients undergoing CTS percutaneously ultrasound-guided and compare it with those of open surgery. MATERIAL AND METHOD: Prospective observational cohort study of 50 patients undergoing CTS (25 percutaneous with WALANT technique and 25 by open surgery with local anaesthesia and tourniquet). Open surgery was performed using a short palmar incision. The percutaneous technique was performed anterograde using the Kemis H3® scalpel (Newclip). A preoperative and postoperative assessment was performed at 2 weeks, 6 weeks and 3 months. Demographic data, presence of complications, grip strength and Levine test score (BCTQ) were collected. RESULTS: The sample consists of 14 men and 36 women with a mean age of 51.4 years (95% CI: 48.4-54.5). Percutaneous technique was performed anterograde using the Kemis H3® scalpel (Newclip). All patients improved from their CTS clinic without obtaining statistically significant differences in BCTQ score, nor in the presence of complications (p>0.05). Patients operated on percutaneously recovered faster grip strength at 6 weeks, but it was similar in the final review. CONCLUSIONS: In view of the results obtained, percutaneous ultrasound-guided surgery is a good alternative for the surgical treatment of CTS. Logically, this technique requires its learning curve and familiarisation with the ultrasound visualisation of the anatomical structures to be treated.

Ultrasound guided arthroscopic meniscus surgery.

Ultrasound is a useful adjunctive intra-operative imaging modality for soft tissue pathologies. It is readily available in the operating theater and has the distinct advantage of being more portable than an MRI, with no harmful radiation. It is especially useful for determining if any extra articular cysts have been decompressed through arthroscopic surgery, if a parameniscal cyst has been removed completely or if extrusion has been reduced adequately in a meniscus root repair. In our series, intra-operative ultrasound was used for two cases of medial meniscus horizontal tear with meniscus cyst excision, one case of lateral parameniscal cyst without a communicating tear, and five cases of meniscus root repairs. Ultrasound has the potential to be an important intra-operative diagnostic modality not only in diagnosing pathologies but also accurately localizing the soft tissue pathology, which is critical in arthroscopic surgery where the incisions are small. It also has the added advantage of guiding portal placements, especially in areas where there are neurovascular structures, to avoid injuring them. However, training in its effective use by the surgeon is important.

Percutaneous ultrasound-guided section of the transverse carpal ligament vs open surgery for the surgical treatment of carpal tunnel syndrome (CTS). / Sección del ligamento transverso del carpo de forma percutánea ecoguiada vs. cirugía abierta para el tratamiento quirúrgico del síndrome del túnel del carpo (STC).

BACKGROUND AND OBJECTIVE: The gold standard of carpal tunnel syndrome (CTS) treatment is the section of the transverse carpal ligament, the most common technique being the palmar cutaneous incision. Percutaneous techniques have been developed, although their risk/benefit ratio remains controversial. OBJECTIVE: To analyze the functional outcome of patients undergoing CTS percutaneously ultrasound-guided and compare it with those of open surgery. MATERIAL AND METHOD: Prospective observational cohort study of 50 patients undergoing CTS (25 percutaneous with WALANT technique and 25 by open surgery with local anesthesia and tourniquet). Open surgery was performed using a short palmar incision. The percutaneous technique was performed anterograde using the Kemis® H3 scalpel (Newclip). A preoperative and postoperative assessment was performed at 2 weeks, 6 weeks and 3 months. Demographic data, presence of complications, grip strength and Levine test score (BCTQ) were collected. RESULTS: The sample consists of 14 men and 36 women with a mean age of 51.4 years (95% CI: 48.4-54.5). Percutaneous technique was performed anterograde using the Kemis® H3 scalpel (Newclip). All patients improved from their CTS clinic without obtaining statistically significant differences in BCTQ score, nor in the presence of complications (p> 0.05). Patients operated on percutaneously recovered faster grip strength at 6 weeks, but it was similar in the final review. CONCLUSIONS: In view of the results obtained, percutaneous ultrasound-guided surgery is a good alternative for the surgical treatment of CTS. Logically, this technique requires its learning curve and familiarization with the ultrasound visualization of the anatomical structures to be treated.

Needle-based gastrocnemius lengthening: a novel ultrasound-guided noninvasive technique.

BACKGROUND: Gastrocnemius tendon lengthening is performed to treat numerous conditions of the foot and ankle. Gastrocnemius shortening has been associated with more than 30 lower limb disorders, including plantar heel pain/plantar fasciitis, Achilles tendinosis, equinus foot, adult flat foot deformity, and metatarsalgia. Ultrasound-guided ultraminimally invasive lengthening of the gastrocnemius is a step forward in this type of surgery. It can be performed in both legs simultaneously without ischemia using only local anesthesia plus sedation and without the need for a cast or immobilization. The truly novel advantage of the procedure is that it can be performed in the office, without specific surgical instruments. The aim of our research was to prove the effectiveness and safety of a new closed needle-based ultrasound-guided surgical procedure for lengthening the gastrocnemius tendon. METHODS AND RESULTS: We performed ultrasound-guided gastrocnemius tendon lengthening using a needle in eight fresh frozen specimens (3 left and 5 right). None of the specimens had been affected by disease or undergone previous surgery that could have affected the surgical technique. We used a linear transducer with an 8- to 17-MHz linear transducer and the beveled tip of an Abbocath as a surgical blade to perform the lengthening procedure. The gastrocnemius Achilles tendon recession was entirely transected in all eight specimens, with no damage to the sural nerve or vessels. The improvement in dorsal flexion was 15°. CONCLUSION: Needle-based ultrasound-guided gastrocnemius tendon lengthening is safe, since the surgeon can see all structures clearly, thus minimizing the risk of damage. The absence of a wound obviates the need for stitches, and recovery seems to be faster. The procedure can be performed in a specialist's office, as no specific surgical instruments are required. This technique could be a valid option for gastrocnemius lengthening and may even be less traumatic than using a hook-knife, as in our previous description.

Ultrasound-Guided Anterior Talofibular Ligament Repair With Augmentation Can Restore Ankle Kinematics: A Cadaveric Biomechanical Study.

Background: Anterior talofibular ligament (ATFL) repair of the ankle is a common surgical procedure. Ultrasound (US)-guided anchor placement for ATFL repair can be performed anatomically and accurately. However, to our knowledge, no study has investigated ankle kinematics after US-guided ATFL repair. Hypothesis: US-guided ATFL repair with and without inferior extensor retinaculum (IER) augmentation will restore ankle kinematics. Study Design: Controlled laboratory study; Level of evidence, 4. Methods: A 6 degrees of freedom robotic testing system was used to apply multidirectional loads to fresh-frozen cadaveric ankles (N = 9). The following ankle states were evaluated: ATFL intact, ATFL deficient, combined ATFL repair and IER augmentation, and isolated US-guided ATFL repair. Three loading conditions (internal-external rotation torque, anterior-posterior load, and inversion-eversion torque) were applied at 4 ankle positions: 30° of plantarflexion, 15° of plantarflexion, 0° of plantarflexion, and 15° of dorsiflexion. The resulting kinematics were recorded and compared using a 1-way repeated-measures analysis of variance with the Benjamini-Hochberg test. Results: Anterior translation in response to an internal rotation torque significantly increased in the ATFL-deficient state compared with the ATFL-intact state at 30° and 15° of plantarflexion (P = .022 and .03, respectively). After the combined US-guided ATFL repair and augmentation, anterior translation was reduced significantly compared with the ATFL-deficient state at 30° and 15° of plantarflexion (P = .0012 and .005, respectively). Anterior translation was not significantly different for the isolated ATFL-repair state compared with the ATFL-deficient or ATFL-intact states at 30° and 15° of plantarflexion. Conclusion: Combined US-guided ATFL repair with augmentation of the IER reduced lateral ankle laxity due to ATFL deficiency. Isolated US-guided ATFL repair did not reduce laxity due to ATFL deficiency, nor did it increase instability compared with the intact ankle. Clinical Relevance: US-guided ATFL repair with IER augmentation is a minimally-invasive technique to reduce lateral ankle laxity due to ATFL deficiency. Isolated US-guided ATFL repair may be a viable option if accompanied by a period of immobilization.

Ultrasound-guided aponeurotomy and interphalangeal joint capsular release for treatment of Dupuytren's disease.

This study describes a new ultrasound-guided surgical technique for aponeurotomy and interphalangeal joint capsular release in patients with Dupuytren's disease and analyses the clinical outcomes. We carried out a retrospective review of 70 digits in 35 patients who underwent ultrasound-guided aponeurotomy and interphalangeal joint capsular release, with a minimum follow-up of 2 years. The primary outcome was the correction of the deformity and the QuickDASH questionnaire score after surgery and at 1 and 2 years. The secondary outcome was the presence of residual contracture immediately after surgery. The mean QuickDASH score fell from 28 before surgery to 14 after surgery. A significant decrease of -63° was observed for the global contracture, -35° the metacarpophalangeal joint contracture and -28° for the proximal interphalangeal joint contracture. Ultrasound-guided aponeurotomy and interphalangeal joint capsular and palmar plate releases are highly accurate and safe.Level of evidence: IV.

Sonography-Guided Carpal Tunnel Release.

During the past 2 decades, increased powerful and quality ultrasound devices have contributed to developing ultrasound surgery more specifically for the hand. Carpal tunnel release under ultrasound now is available as a safe technique. The procedure uses a specific device. A detailed surgical technique is presented. The role of sonography is emphasized. This article discusses the results of the 150 first cases. The author's experience is compared with other ultrasound-guided carpal tunnel release procedures. Outcome quality optimized by the ultra-mini-invasive approach and ultrasound should increase its use.

Comparative effectiveness of different localization techniques for non-palpable breast cancer. A systematic review and network meta-analysis.

BACKGROUND: Several localization techniques are in use for localization of non palpable breast cancer but data on comparative effectiveness of these techniques are sparse. Our aim was to provide the first comparative effectiveness data on the topic. METHODS: PubMed, Ovid, Scopus and Cochrane library were searched for randomized controlled trials. Pairwise meta-analysis was performed when more than 2 studies reported on the same head-to-head comparison. Network meta-analysis was performed in Stata. RESULTS: Eighteen studies with 3112 patients were identified. A star shaped network was formed for every outcome as all studies had as common comparator the wire localization technique (WGL). Ultrasound guided surgery (UGS) had decreased positive margin both in the pairwise [OR = 0.19(0.11, 0.35); P < 0.01] and network meta-analysis OR = 0.19 (0.11,0.60). There was also a statistically significant reduction in re-operation rate [OR = 0.19 (0.11, 0.36); P < 0.01] and operative time [MD = -4.24(-7.85,-0.63); P = 0.02] as compared to WGL in pairwise meta-analysis. Re-operation rate and operative time did not hold there statistical significance in network meta-analysis. On network meta-analysis UGS had a statistically significant reduction in positive margin as compared to radio-guided occult lesion localization (ROLL) OR = 0.19 (0.11,0.6) and radioactive seed localization (RSL) OR = 0.26(0.13, 0.52). UGS had a 54.6% of being the best technique for positive margin. All techniques were equivalent for successful excision, localization complications, operative time and overall complications. CONCLUSIONS: UGS has potential benefits in reduction of positive surgical margin, the rest of the techniques seem to have equivalent efficacy. Further randomized trials are required to verify these results.

Ultrasound-guided surgery for lateral snapping hip: a novel ultraminimally invasive surgical technique.

BACKGROUND: Greater trochanteric pain syndrome encompasses a range of causes of lateral hip pain including greater trochanteric bursitis, tendinopathy and tears of the gluteus minimus and medius, and lateral snapping hip (LSH). Surgical options for LSH range from open surgery to endoscopic surgery, including a diamond-shaped cut or a simple transversal release to gluteus maximus tendon release. Resection of an area of proximal iliotibial band (ITB) and step-cut or z-plasty lengthening have not proven superior to transverse release of the ITB. Therefore, making a complete and effective transverse cut guided by ultrasound may represent a potential advance over endoscopic surgery. PURPOSE: In this case series study, we describe how to perform proximal release of the ITB guided by ultrasound. METHODS: The surgical technique-either z-plasty or transverse section of the ITB-was first validated on 10 cadaver specimens and then used in clinical practice. Fourteen patients (5 males and 9 females) were operated from 2014 to 2018. Mean age was 43 years (29-62). RESULTS: The snap resolved in all patients, as verified actively during the surgical procedure as the patient has only local anesthesia. The VAS score for sports activity improved from 7 (5-9) before surgery to 0 (0-2) after 1 year. The HSS score improved from 58 points (47-72) to 96 at 1-2 years. There were no complications other than minor hematomas nor recurrences. CONCLUSION: Ultrasound-guided release of the LSH is a novel surgical option with encouraging results in patients for whom conservative protocols have failed. It can be performed under local anesthesia in an outpatient setting with minimal aggressiveness. It is relatively easy, quick, and painless; no stitches are required. Weight bearing is immediate, and patients usually need crutches for only 2-3 days. Although complete recovery may take 3 months, the rehabilitation protocol is fast and painless.

Ultrasound-Guided Percutaneous Iliotibial Band Release for External Coxa Saltans: A Cadaveric Study.

The surgical treatment of external coxa saltans is not standardized. Many techniques for iliotibial release have been described, both open and arthroscopic. No technique describes ultrasound release. In this cadaveric study, we describe a minimally invasive technique for percutaneous iliotibial release with ultrasound guidance, designed to be performed under local anesthesia. The future objective would be to perform an active intraoperative test of the snapping hip to confirm adequate release, thus reducing the risk of recurrence.

A fast technique for hyper-echoic region separation from brain ultrasound images using patch based thresholding and cubic B-spline based contour smoothing.

Ultrasound image guided brain surgery (UGBS) requires an automatic and fast image segmentation method. The level-set and active contour based algorithms have been found to be useful for obtaining topology-independent boundaries between different image regions. But slow convergence limits their use in online US image segmentation. The performance of these algorithms deteriorates on US images because of the intensity inhomogeneity. This paper proposes an effective region-driven method for the segmentation of hyper-echoic (HE) regions suppressing the hypo-echoic and anechoic regions in brain US images. An automatic threshold estimation scheme is developed with a modified Niblack's approach. The separation of the hyper-echoic and non-hyper-echoic (NHE) regions is performed by successively applying patch based intensity thresholding and boundary smoothing. First, a patch based segmentation is performed, which separates roughly the two regions. The patch based approach in this process reduces the effect of intensity heterogeneity within an HE region. An iterative boundary correction step with reducing patch size improves further the regional topology and refines the boundary regions. For avoiding the slope and curvature discontinuities and obtaining distinct boundaries between HE and NHE regions, a cubic B-spline model of curve smoothing is applied. The proposed method is 50-100 times faster than the other level-set based image segmentation algorithms. The segmentation performance and the convergence speed of the proposed method are compared with four other competing level-set based algorithms. The computational results show that the proposed segmentation approach outperforms other level-set based techniques both subjectively and objectively.

Ultrasound-Guided Proximal and Distal Tarsal Decompression: An Analysis of Pressures in the Tarsal, Medial Plantar, and Lateral Plantar Tunnels.

Objectives. To analyze the reliability of measurements of tarsal tunnel and medial and lateral plantar tunnel pressures before and after ultrasound-guided release. Measurements taken were guided by ultrasound to improve reliability. This novel approach may help surgeons make surgical decisions. The second objective was to confirm that decompression using ultrasound-guided surgery as previously described by the authors is technically effective, reducing pressure to the tarsal and medial and lateral plantar tunnels. Methods. The study included 23 patients with symptoms compatible with idiopathic tarsal tunnel syndrome (TTS). The first step was to measure intracompartmental pressure of the tarsal tunnel, medial plantar tunnel, and lateral plantar tunnel preoperatively. The second step was ultrasound-guided decompression of the tibial nerve and its branches. Subsequently, pressure was measured again immediately after decompression in the 3 tunnels. Results. After surgery, the mean values significantly dropped to normal values. This represents a validation of effective decompression of the tibial nerve and its branches in TTS with ultra-minimally invasive surgery. Conclusions. The ultrasound-guided surgical technique to release the tibial nerve and its branches is effective, significantly reducing pressure in the tunnels and, thereby, decompressing the nerves.Level of evidence: Level IV.

Randomised controlled study to compare radiofrequency ablation with minimally invasive ultrasound-guided non-flush ligation and stripping of great saphenous vein in the treatment of varicose veins.

INTRODUCTION: Flush ligation at the saphenofemoral junction and stripping of the great saphenous vein is being increasingly replaced by endovenous methods such as radiofrequency or endovenous laser ablation for the treatment of varicose veins. These modalities are expensive and not widely available. A minimally invasive ultrasound-guided surgery with non-flush ligation and stripping under local anaesthesia is a cost-effective alternative with similar postoperative outcomes. MATERIALS AND METHODS: A total of 62 limbs (58 patients) with saphenofemoral junction incompetence underwent clinical evaluation including the CEAP clinical score, the venous clinical severity score, the venous disability score and venous doppler. Patients were randomly assigned to either group A (radiofrequency ablation) or group B (ultrasound-guided non-flush ligation and stripping of the great saphenous vein) for procedures under tumescent anaesthesia and ultrasound guidance. Patients were followed-up on days 7, 30 and 90 to assess primary (obliteration rates) and secondary (venous clinical severity score and venous disability score) outcomes. RESULTS: Both the groups showed 100% obliteration of the great saphenous vein at day 90. The venous clinical severity and venous disability scores significantly improved from day 0 to day 90 in both groups (p = 0.0001). There were no major complications. Group A showed significantly lower minor complications (p = 0.001). None required conversation to general anaesthesia. CONCLUSIONS: The ultrasound-guided non-flush ligation and stripping of the great saphenous vein are as efficacious as radio frequency ablation, with similar obliteration rates, improvement in disability scores and complication profile at a lower cost. It has the potential for wider availability in the community as most surgeons are conversant with the surgical procedure.