Electrical Impedance Tomography-based detection of phrenic nerve blocks occurring after ultrasound-guided anterior suprascapular nerve blocks compared to interscalene brachial plexus blocks for arthroscopic shoulder surgery.

Electrical Impedance Tomography-based detection of phrenic nerve blocks occurring after ultrasound-guided anterior suprascapular nerve blocks compared to interscalene brachial plexus blocks for arthroscopic shoulder surgery. - Phrenic Nerve Blocks after ISB or SSNB

Status

Active, not recruiting

Phases

Phase 4

Study type

Interventional

Source

DRKS

Registry ID

DRKS00011787

Enrollment

Registered

2017-05-03

Start date

2017-06-28

Completion date

Unknown

Last updated

2025-04-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Indication for elective shoulder surgery

Interventions

Group 1: Patients scheduled for arthroscopic shoulder surgery will be studied. In addition to general anesthesia, an ultrasound-guided anterior suprascapular nerve block (SSNB) will be performed for p

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: 1. Arthroscopic shoulder surgery 2. Patients in ASA classes 1 to 3 3. Informed consent 4. Surgery with General anaesthetic 5. Meets guidelines regarding peri-operative coagulation 6. Age > 18 years

Exclusion criteria

Exclusion criteria: 1. Allergy to local anaesthetic 2. Pregnancy 3. Obesity (BMI > 35) 4. Pre-existing anatomical deformities (e.g. induced by fracture of the clavicle) 5. Neuropathy (primary: genetic; sekundary: inflammatory, auto-immune, metabolic, toxic) 6. Known disease of the diaphragm 7. Pacemaker or implantable cardioverter-defibrillator (ICD)

Design outcomes

Primary

Measure	Time frame
Detection of impaired ventilation using electrical impedance tomography (EIT) at 3 points in time: pre-operatively, post-operatively (postanesthesia care unit), after 1 day	—

Secondary

Measure	Time frame
() use of opioids in the post-anaesthesia care unit () NSAID (nonsteroidal anti-inflammatory drugs) use in the 24h after surgery () effectiveness of pain management (numerical rating scale) () quality of block (motor block and/or sensory block) () quantitative grip strength (Grip Strength Meter)	—

Countries

Germany

Contacts

Public ContactMartin Wiegel

ACQUA Klinik Abteilung Anästhesie

martin.wiegel@anaesthsie.med.pro0341 33733139

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 17, 2026