Musculoskeletal sonography (or echography) has dramatically expanded among medical specialities for diagnostic and interventional purposes due to its affordability, portability and availability. High-frequency sonography can now be used to guide the surgical release of trigger finger and carpal tunnel. Spirecut’s patented Sono-Instruments allow percutaneous release under sonography in adult patients. The operation is usually done under local anaesthesia, in a day clinic or outpatient facility, the morbidity is minimal, and the patient can immediately resume all activities. The Sono-Instruments® are an improvement of simple needles used by surgeons and radiologists to treat various conditions under sonography (commonly referred to as “needling” procedures). Sono-Instruments provide an adapted design to facilitate the introduction and safe release of the thickened tissue and allow easy perioperative sonographic tracking. Good visualization under sonography renders the surgery safe to prevent iatrogenic injury of neighboring anatomical structures. There are two sizes, the smaller for the fingers and thumb, the bigger for the carpal tunnel.