Intraoperative Neuromonitoring of Sacral Reflexes to Predict Post Operative Function in Patients Undergoing Sacrectomy for Pelvic Bone Malignancy or Patients Undergoing Spinal Procedures Without Sacral Root Involvement
10. juli 2026 oppdatert av: City of Hope Medical Center
Phase 2a Prospective Study of Intraoperative Neuromonitoring of the Bulbocavernosus and External Urethral Sphincter Reflexes
This clinical trial tests how well monitoring the sacral reflexes during surgery (intraoperatively) works to predict the post operative function for patients undergoing removal of the lowest part of the spine (sacrectomy) for pelvic bone cancers or patients undergoing spinal procedures.
These surgical procedures can lead to damage to sacral root nerves which can result in impairment to the lower extremities, bowel, bladder, and sexual function.
Intraoperative monitoring of sacral reflexes can provide objective, real-time information about pelvic nerve function during surgery.
This can aid surgical decision-making and help surgeons better prepare patients to understand the changes that may have occurred to their function as a result of surgery.
Intraoperative neuromonitoring may work well to predict postoperative function in patients undergoing sacrectomy for pelvic bone malignancy or patients undergoing spinal procedures.
Studieoversikt
Status
Har ikke rekruttert ennå
Detaljert beskrivelse
PRIMARY OBJECTIVE:
I. To evaluate the feasibility of acquiring analyzable sacral reflex neuromonitoring data at baseline and case closure during surgery.
SECONDARY OBJECTIVES:
I. To characterize sacral reflex parameters amplitude, latency, waveform morphology, and Nerveana Power Index (NPI) at baseline under standardized intraoperative neuromonitoring conditions in patients undergoing spinal procedures without sacral nerve root involvement and patients undergoing sacrectomy.
II. To describe intraoperative changes in sacral reflex parameters from baseline to end-of-case during standardized intraoperative neuromonitoring in patients undergoing sacrectomy.
III. To characterize the relative contribution of individual sacral nerve roots to sacral reflex responses during intraoperative stimulation in patients undergoing sacrectomy.
IV. To characterize longitudinal changes in postoperative functional outcomes in patients undergoing sacrectomy.
EXPLORATORY OBJECTIVES:
I. To explore the association between intraoperative sacral reflex changes and postoperative functional outcomes in patients undergoing sacrectomy.
II. To explore the association between sacrifice of higher- versus lower-contributing sacral nerve roots and postoperative functional outcomes in patients undergoing sacrectomy.
OUTLINE:
Patients undergo neuromonitoring of the sacral reflexes at predefined time points during standard of care surgery.
After completion of study treatment, patients are followed up at 21 days, 6 weeks and 3, 6 and 12 months.
Studietype
Intervensjonell
Registrering (Antatt)
50
Fase
- Ikke aktuelt
Kontakter og plasseringer
Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.
Studiesteder
-
-
California
-
Duarte, California, Forente stater, 91010
- City of Hope Medical Center
-
Ta kontakt med:
- Alana M. Munger
- Telefonnummer: 808-384-0975
- E-post: amunger@coh.org
-
Hovedetterforsker:
- Alana M. Munger
-
-
Deltakelseskriterier
Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.
Kvalifikasjonskriterier
Alder som er kvalifisert for studier
- Voksen
- Eldre voksen
Tar imot friske frivillige
Nei
Beskrivelse
Inclusion Criteria:
Documented informed consent of the participant and/or legally authorized representative.
- Assent, when appropriate, will be obtained per institutional guidelines
- Age: ≥ 18 years
- Ability to complete study questionnaires
- Willingness to comply with all study procedures, including postoperative patient-reported outcome (PRO) assessments
Undergoing surgery at City of Hope involving either:
- Complete or partial sacrectomy for primary or metastatic bone tumors, or
- Thoracolumbar intervention in which the sacral roots are not exposed or manipulated (reference cohort)
Exclusion Criteria:
- Prior sacrectomy or prior surgery resulting in complete sacral nerve transection
- For thoracolumbar cohort patients, prior diagnosis or patient report of bowel or bladder dysfunction
- Cognitive or psychiatric conditions preventing reliable completion of PRO instruments
Studieplan
Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.
Hvordan er studiet utformet?
Designdetaljer
- Primært formål: Diagnostisk
- Tildeling: N/A
- Intervensjonsmodell: Enkeltgruppeoppdrag
- Masking: Ingen (Open Label)
Våpen og intervensjoner
Deltakergruppe / Arm |
Intervensjon / Behandling |
|---|---|
|
Eksperimentell: Diagnostic (Intraoperative neuromonitoring)
Patients undergo neuromonitoring of the sacral reflexes at predefined time points during standard of care surgery.
|
Hjelpestudier
Gjennomgå standardbehandlingskirurgi
Andre navn:
Undergo intraoperative neuromonitoring
Andre navn:
|
Hva måler studien?
Primære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
Reproducible and interpretable bulbocavernosus reflex (BCR) and external urethral sphincter (EUS) reflex responses (feasibility)
Tidsramme: From baseline, Up to 1 year
|
Reproducible is defined as the ability to elicit a reflex response on repeated stimulation with consistent waveform presence and morphology at a given timepoint.
Interpretable is defined as a recorded reflex response that is distinguishable from background noise and artifact and permits determination of response presence or absence and measurement of latency and amplitude.
A two-sided 95% Clopper-Pearson confidence interval will be provided as a measure of precision.
|
From baseline, Up to 1 year
|
Sekundære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
Distribution of BCR reflex parameters
Tidsramme: From baseline, Up to 1 year
|
Amplitude, latency, frequency distribution, etc, measured via intraoperative neuromonitoring (IONM).
), Analyses will first be conducted separately within thoracolumber and sacrectomy patient groups.
Descriptive statistics will be reported for BCR for each group.
Next, to compare the mean values between the two groups, t-test or Mann-Whitney U-test will be implemented depending on the distribution of these parameters.
Additionally, within the sacrectomy group, the changes of these parameters from baseline to the end-of-case will be assessed either through paired t-test or Wilcoxon's signed rank test, depending on the distribution of each parameter.
|
From baseline, Up to 1 year
|
|
Distribution of EUS reflex parameters
Tidsramme: From baseline, Up to 1 year
|
Amplitude, latency, frequency distribution, etc, measured via IONM.
Analyses will first be conducted separately within thoracolumber and sacrectomy patient groups.
Descriptive statistics will be reported for EUS for each group.
Next, to compare the mean values between the two groups, t-test or Mann-Whitney U-test will be implemented depending on the distribution of these parameters.
Additionally, within the sacrectomy group, the changes of these parameters from baseline to the end-of-case will be assessed either through paired t-test or Wilcoxon's signed rank test, depending on the distribution of each parameter.
|
From baseline, Up to 1 year
|
|
Change in BCR reflex parameters
Tidsramme: From baseline, Up to 1 year
|
Analyses will first be conducted separately within thoracolumber and sacrectomy patient groups.
Descriptive statistics will be reported for BCR for each group.
Next, to compare the mean values between the two groups, t-test or Mann-Whitney U-test will be implemented depending on the distribution of these parameters.
Additionally, within the sacrectomy group, the changes of these parameters from baseline to the end-of-case will be assessed either through paired t-test or Wilcoxon's signed rank test, depending on the distribution of each parameter.
|
From baseline, Up to 1 year
|
|
Change in EUS reflex parameters
Tidsramme: From baseline, Up to 1 year
|
Analyses will first be conducted separately within thoracolumber and sacrectomy patient groups.
Descriptive statistics will be reported for EUS for each group.
Next, to compare the mean values between the two groups, t-test or Mann-Whitney U-test will be implemented depending on the distribution of these parameters.
Additionally, within the sacrectomy group, the changes of these parameters from baseline to the end-of-case will be assessed either through paired t-test or Wilcoxon's signed rank test, depending on the distribution of each parameter.
|
From baseline, Up to 1 year
|
|
Relative contribution of individual right sacral nerve roots to BCR amplitude
Tidsramme: During intraoperative stimulation, Up to Day 21
|
Amplitudes among sacrectomy patients will be descriptively reported.
|
During intraoperative stimulation, Up to Day 21
|
|
Relative contribution of individual left sacral nerve roots to BCR amplitude
Tidsramme: During intraoperative stimulation, Up to Day 21
|
Amplitudes among sacrectomy patients will be descriptively reported.
|
During intraoperative stimulation, Up to Day 21
|
|
Relative contribution of individual right sacral nerve roots to EUS amplitude
Tidsramme: During intraoperative stimulation, Up to Day 21
|
Amplitudes among sacrectomy patients will be descriptively reported.
|
During intraoperative stimulation, Up to Day 21
|
|
Relative contribution of individual left sacral nerve roots to EUS amplitude
Tidsramme: During intraoperative stimulation, Up to Day 21
|
Amplitudes among sacrectomy patients will be descriptively reported.
|
During intraoperative stimulation, Up to Day 21
|
|
Bowel function scores
Tidsramme: From baseline, Up to 1 year
|
Assessed by Memorial Sloan Kettering Bowel Function Instrument.
Will be described by graphs and descriptive statistics at each time point.
|
From baseline, Up to 1 year
|
|
Bladder function scores
Tidsramme: From baseline, up to 1 year
|
Assessed by International Consultation on Incontinence Questionnaire.
Will be described by graphs and descriptive statistics at each time point.
|
From baseline, up to 1 year
|
|
Sexual function scores
Tidsramme: From baseline, up to 1 year
|
Assessed by Female Sexual Function Index (female patients only) and International Index of Erectile Function (male patients only).
Will be described by graphs and descriptive statistics at each time point.
|
From baseline, up to 1 year
|
|
Lower extremity function
Tidsramme: From baseline, up to 1 year
|
Assessed by Toronto Extremity Salvage Score for the Lower Extremity.
Will be described by graphs and descriptive statistics at each time point.
|
From baseline, up to 1 year
|
|
Quality of life
Tidsramme: From baseline, up to 1 year
|
Assessed by Functional Assessment of Cancer Therapy-General.
Will be described by graphs and descriptive statistics at each time point.
|
From baseline, up to 1 year
|
|
Postoperative urologic function
Tidsramme: From baseline, up to 1 year
|
Assessed by post-void residual (PVR) or cystometry.
Will be described by graphs and descriptive statistics at each time point.
|
From baseline, up to 1 year
|
Samarbeidspartnere og etterforskere
Det er her du vil finne personer og organisasjoner som er involvert i denne studien.
Sponsor
Samarbeidspartnere
Etterforskere
- Hovedetterforsker: Alana M Munger, City of Hope Medical Center
Studierekorddatoer
Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.
Studer hoveddatoer
Studiestart (Antatt)
10. januar 2027
Primær fullføring (Antatt)
10. juni 2029
Studiet fullført (Antatt)
10. juni 2029
Datoer for studieregistrering
Først innsendt
10. juli 2026
Først innsendt som oppfylte QC-kriteriene
10. juli 2026
Først lagt ut (Faktiske)
16. juli 2026
Oppdateringer av studieposter
Sist oppdatering lagt ut (Faktiske)
16. juli 2026
Siste oppdatering sendt inn som oppfylte QC-kriteriene
10. juli 2026
Sist bekreftet
1. juli 2026
Mer informasjon
Begreper knyttet til denne studien
Ytterligere relevante MeSH-vilkår
Andre studie-ID-numre
- 25826 (Annen identifikator: City of Hope Medical Center)
- P30CA033572 (U.S. NIH-stipend/kontrakt)
- NCI-2026-04599 (Registeridentifikator: CTRP (Clinical Trial Reporting Program))
Legemiddel- og utstyrsinformasjon, studiedokumenter
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Nei
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