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OBJECTIVE: 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).
CONCLUSIONS: Percutaneous sono-guided release using Sono-Instruments® is safe and efficient, and associated with quick functional recovery.
METHODS: II.

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.
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.
CONCLUSIONS: 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.

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.

OBJECTIVE: 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.
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.
CONCLUSIONS: 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.

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.
METHODS: 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.

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.
METHODS: 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.

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.
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°.
CONCLUSIONS: 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.

UNASSIGNED: 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.
UNASSIGNED: US-guided ATFL repair with and without inferior extensor retinaculum (IER) augmentation will restore ankle kinematics.
UNASSIGNED: Controlled laboratory study; Level of evidence, 4.
UNASSIGNED: 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.
UNASSIGNED: 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.
UNASSIGNED: 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.
UNASSIGNED: 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.

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.