{"data":{"id":"10.5281/zenodo.20086572","type":"dois","attributes":{"doi":"10.5281/zenodo.20086572","prefix":"10.5281","suffix":"zenodo.20086572","identifiers":[],"alternateIdentifiers":[],"creators":[{"name":"Matthew Ramsey","nameType":"Personal","familyName":"Matthew Ramsey","affiliation":["Feinberg School of Medicine at Northwestern University, Chicago, IL, USA"],"nameIdentifiers":[]},{"name":"Jong Uk Kim","nameType":"Personal","familyName":"Jong Uk Kim","affiliation":["Northwestern University"],"nameIdentifiers":[]},{"name":"John Rogers","nameType":"Personal","familyName":"John Rogers","affiliation":["Northwestern University"],"nameIdentifiers":[]},{"name":"Colin Franz","nameType":"Personal","familyName":"Colin Franz","affiliation":["Feinberg School of Medicine at Northwestern University, Chicago, IL, USA"],"nameIdentifiers":[]},{"name":"Sumanas Jordan","nameType":"Personal","familyName":"Sumanas Jordan","affiliation":["Feinberg School of Medicine at Northwestern University, Chicago, IL, USA"],"nameIdentifiers":[]}],"titles":[{"title":"Treatment Of Chronic Phrenic Neuropathy With A Functional Rectus Abdominis Muscle Transfer And Implantable Synchronized Diaphragm Pacing"}],"publisher":"Zenodo","container":{},"publicationYear":2026,"subjects":[{"subject":"plastic surgery"},{"subject":"reconstructive surgery"},{"subject":"conference abstract"},{"subject":"PSRC 2026"}],"contributors":[],"dates":[{"date":"2026-05-08","dateType":"Issued"}],"language":null,"types":{"ris":"CPAPER","bibtex":"article","citeproc":"","schemaOrg":"Article","resourceType":"","resourceTypeGeneral":"ConferencePaper"},"relatedIdentifiers":[{"relationType":"HasVersion","relatedIdentifier":"10.5281/zenodo.20086573","relatedIdentifierType":"DOI"}],"relatedItems":[],"sizes":[],"formats":[],"version":null,"rightsList":[{"rights":"Creative Commons Attribution Non Commercial No Derivatives 4.0 International","rightsUri":"https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode","schemeUri":"https://spdx.org/licenses/","rightsIdentifier":"cc-by-nc-nd-4.0","rightsIdentifierScheme":"SPDX"}],"descriptions":[{"description":"PURPOSE: Phrenic neuropathy (PhN) is a complex, debilitating condition that confers significant morbidity to both patients and the healthcare system at large. The impaired diaphragm contraction creates chronic complications from sustained mechanical ventilation. Patients with chronic PhN are outside the critical window for phrenic nerve interventions to restore diaphragm contraction and ultimately, volitional respiration. We therefore seek to treat this population by establishing a new functional muscle transfer using the rectus abdominis (RA) as a tendon transfer to power the denervated, paralyzed diaphragm in chronic PhN. The RA represents an ideal donor muscle given its proximity for use as a pedicled muscle flap, adequate excursion equal to tidal volume diaphragm excursion, ample contractile strength, optimal vector of contracture and reliable motor nerve anatomy to allow for pacer coupling. METHODS: Previous work from our lab has established a rat model of unilateral phrenic neuropathy with diaphragm pacing using a custom device from Rogers Research Group. We extend this model to establish a new surgical technique and rehabilitation pathway. Sprague-Dawley rats will be used to describe the RA surgical procedure with postoperative diaphragm excursion and transdiaphragmatic pressures (Pdi) being the primary outcomes. RESULTS: Initial surgeries have established the reliable neurovascular anatomy of the rat RA muscle and technique for fascial harvest and inset across the central tendon of the diaphragm. Previous work from our lab has established diaphragm excursion to be 3mm with tidal volumes on ultrasound (dUS). The RA demonstrated an intraoperative excursion of 4mm with maximal, single intercostal nerve stimulation and 8mm of excursion with synchronized stimulation of two adjacent intercostal motor nerves. Ongoing work will employ the novel, custom nerve pacer currently being developed to quantify contractile force of the in vivo RA muscle-tendon construct prior to inset, establish the rehabilitation timeline for the RA tendon transfer, trace weekly dUS and Pdi as a direct assessment of airway pressures, and evaluate the potential for long term plasticity to natively synchronize RA contraction without pacing. CONCLUSION: We seek to establish a new surgical technique for chronic PhN, describe the rehabilitation timeline, and validate functional recovery for ultimate bedside translation. This work will ultimately help separate patients with chronic PhN from mechanical ventilation to reduce their morbidity and mortality from pulmonary complications.\n\n*Source: https://ps-rc.org/meeting/Program/2026/52.cgi*","descriptionType":"Abstract"},{"description":"Abstract ID: 52","descriptionType":"Other"}],"geoLocations":[],"fundingReferences":[],"xml":"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