- ICH GCP
- Yhdysvaltain kliinisten tutkimusten rekisteri
- Kliininen tutkimus NCT07569861
Copeptin Measurement After Mannitol and Hypertonic Saline for the Diagnosis of Polyuria-polydipsia Syndrome (COMPASS)
Tutkimuksen yleiskatsaus
Tila
Interventio / Hoito
Yksityiskohtainen kuvaus
Polyuria-polydipsia syndrome (PPS), characterized by excessive urination and fluid intake, can have different underlying causes, including a deficiency of the hormone vasopressin (AVP-D) or excessive fluid intake without AVP-D (primary polydipsia). Correctly identifying the cause is essential, as the treatments differ and an incorrect diagnosis can negatively impact patient care.
A blood marker called copeptin is used to support the diagnosis, as it reflects vasopressin levels in the body. Currently, the most accurate method involves measuring copeptin after stimulation with hypertonic saline. However, this test is complex, requires close medical monitoring, and can be uncomfortable for patients.
Mannitol is a substance already used in routine clinical care and may offer a simpler way to stimulate copeptin release. Early results suggest that it could provide similar diagnostic accuracy with fewer side effects and better patient comfort.
This study is a randomized, cross-over, multicenter trial in which participants undergo both tests (mannitol and hypertonic saline) in random order. The study compares the diagnostic accuracy and patient preference for both methods, as well as safety and tolerability. In addition, it explores whether other clinical and laboratory measures can further improve the diagnosis of PPS.
Opintotyyppi
Ilmoittautuminen (Arvioitu)
Vaihe
- Ei sovellettavissa
Yhteystiedot ja paikat
Opiskeluyhteys
- Nimi: Talitha Hildebrandt
- Puhelinnumero: +41 61 55 65075
- Sähköposti: talithanatalja.hildebrandt@usb.ch
Tutki yhteystietojen varmuuskopiointi
- Nimi: Cemile Bathelt
- Puhelinnumero: +41 61 55 65407
- Sähköposti: cemile.bathelt@usb.ch
Opiskelupaikat
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Basel, Sveitsi, 4031
- Rekrytointi
- University Hospital Basel
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Päätutkija:
- Mirjam Christ-Crain, Prof. Dr.
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Ottaa yhteyttä:
- Talitha Hildebrandt
- Puhelinnumero: +41 61 55 65075
- Sähköposti: talithanatalja.hildebrandt@usb.ch
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Osallistumiskriteerit
Kelpoisuusvaatimukset
Opintokelpoiset iät
- Aikuinen
- Vanhempi Aikuinen
Hyväksyy terveitä vapaaehtoisia
Kuvaus
Inclusion Criteria:
- Age ≥ 18 years
- Hypotonic polyuria/polydipsia syndrome defined as polyuria >40ml/kg body weight/24h and polydipsia >3l/24h; and urine osmolality <800mOsm/L or known AVP-D based on accepted criteria
Exclusion Criteria:
- Polyuria/polydipsia secondary to diabetes mellitus, hypercalcemia, or hypokalemia
- Diagnosis of AVP-R (Copeptin > 21.4 pmol/L)
- Evidence of acute illness
- Epilepsy requiring treatment
- Uncontrolled arterial hypertension (blood pressure >160/100mmHg at baseline
- eGFR < 60 ml/min/1,73 m2
- Cardiac failure (NYHA III-IV)
- Diagnosis of liver cirrhosis, Child-Pugh Class C
- Uncorrected adrenal or thyroidal deficiency
- Pregnancy or breastfeeding
- Current or unresolved urinary obstruction
- Enrollment in a clinical trial within the last 30 days
- Patients refusing or unable to give written informed consent
- Inability to follow study procedures
Opintosuunnitelma
Miten tutkimus on suunniteltu?
Suunnittelun yksityiskohdat
- Ensisijainen käyttötarkoitus: Diagnostiikka
- Jako: Satunnaistettu
- Inventiomalli: Crossover-tehtävä
- Naamiointi: Ei mitään (avoin tarra)
Aseet ja interventiot
Osallistujaryhmä / Arm |
Interventio / Hoito |
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Kokeellinen: Mannitol Infusion
Diagnostic evaluation of polyuria polydipsia syndrome through copeptin measurement after mannitol infusion.
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Intravenous infusion of 1.5g/kg body weight (max.
120g) mannitol is given over 30 minutes (≙ 7.5ml/kg body weight).
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Active Comparator: Hypertonic Saline Infusion (HIS)
Diagnostic evaluation of polyuria polydipsia syndrome through copeptin measurement after HIS
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Intravenous infusion of NaCl 3% is given first as a bolus of 250ml over 15 minutes, then with an infusion rate of 0.15ml/kg body weight / minute (≙ 9ml/kg body weight/hour).
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Mitä tutkimuksessa mitataan?
Ensisijaiset tulostoimenpiteet
Tulosmittaus |
Toimenpiteen kuvaus |
Aikaikkuna |
|---|---|---|
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Overall Diagnostic Accuracy
Aikaikkuna: One time assessment at Follow up Visit 2 (10 weeks after baseline)
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The overall diagnostic accuracy is defined as the proportion of correct diagnoses out of all diagnoses based on the stimulated copeptin value.
Final diagnosis will be made after termination of the study by two endocrine specialists who will be blinded to the copeptin results of the mannitol infusion.
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One time assessment at Follow up Visit 2 (10 weeks after baseline)
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Patient Test Preference
Aikaikkuna: 1 week after completion of both diagnostic tests
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Patient-reported preference between mannitol infusion and hypertonic saline infusion, assessed using a 5-point Likert scale ranging from -2 (strong preference for hypertonic saline) to +2 (strong preference for mannitol).
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1 week after completion of both diagnostic tests
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Toissijaiset tulostoimenpiteet
Tulosmittaus |
Toimenpiteen kuvaus |
Aikaikkuna |
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Diagnostic Performance Measures for AVP-D
Aikaikkuna: At completion of follow-up, 10 weeks after last diagnostic test
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Sensitivity, specificity, positive predictive value, and negative predictive value of mannitol infusion and hypertonic saline infusion for diagnosing AVP deficiency using predefined copeptin cut-offs.
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At completion of follow-up, 10 weeks after last diagnostic test
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Diagnostic Performance Measures for PP
Aikaikkuna: At completion of follow-up, 10 weeks after last diagnostic test
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Sensitivity, specificity, positive predictive value, and negative predictive value of mannitol infusion and hypertonic saline infusion for diagnosing PP using predefined copeptin cut-offs.
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At completion of follow-up, 10 weeks after last diagnostic test
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Optimal copeptin cut-off after mannitol infusion
Aikaikkuna: At completion of follow-up, 10 weeks after last diagnostic test
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Exploratory determination and validation of optimal copeptin cut-off values for differentiating AVP deficiency from primary polydipsia following mannitol stimulation.
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At completion of follow-up, 10 weeks after last diagnostic test
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Frequency and severity of clinical symptoms
Aikaikkuna: During each test day (baseline to end of monitoring period 90 minutes/ 240 minutes)
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Frequency and severity of symptoms (e.g., thirst, headache, nausea, malaise) assessed using numeric rating scales during mannitol and hypertonic saline tests.
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During each test day (baseline to end of monitoring period 90 minutes/ 240 minutes)
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Subjective burden of each test assessed by numeric rating scale
Aikaikkuna: Immediately after each test day
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Patient-reported burden of each diagnostic test assessed using a numeric rating scale (NRS) (0-10).
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Immediately after each test day
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Psychopathological assessment (STAI-T)
Aikaikkuna: Baseline
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General anxiety levels is assessed by State-Trait Anxiety Inventory (STAI-T) questionnaire.
The total trait score (STAI-T) ranges from 20 to 80, with higher scores indicating more pronounced anxiety.
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Baseline
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Autistic traits
Aikaikkuna: Baseline
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Autistic traits is assessed by Autism-Spectrum Quotient (AQ) questionnaire.
The AQ consists of 50 items, with four choices for each item from "definitely agree" to "definitely disagree" and a total score from 0 to 50.
A score above the proposed cut-off of 29 highlights significant traits of autism.
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Baseline
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Quality of Life in Posterior Pituitary Disease
Aikaikkuna: Baseline and follow-up (10 weeks )
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Currently, no disease-specific tool exists to assess treatment success for either desmopressin or oxytocin (OXT) therapy in patients with arginine vasopressin deficiency (AVP-D).
To address this gap, we developed a novel multidimensional questionnaire in close collaboration with patients, patient representatives, and patient advocates.
The PP-QoL consists of three parts: Part A assesses symptoms related to AVP-D (15 items), while Parts B (17 items) and C (21 items) focus on domains associated with OXT deficiency.
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Baseline and follow-up (10 weeks )
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Change in oxytocin/neurophysin I levels
Aikaikkuna: Baseline and 90 minutes post-stimulation
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Change in circulating oxytocin and neurophysin I levels before and after each diagnostic test.
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Baseline and 90 minutes post-stimulation
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Spearman's rank correlation coefficient between psychopathology questionnaires and oxytocin levels
Aikaikkuna: Baseline and 90 minutes post-stimulation
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Correlation between psychopathological questionnaires and oxytocin levels will be described using Spearman's rank correlation coefficient.
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Baseline and 90 minutes post-stimulation
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Spearman's rank correlation coefficient between psychopathology questionnaire and neurophysin I levels
Aikaikkuna: Baseline and 90 minutes post-stimulation
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Correlation between psychopathological questionnaires and neurophysin I levels will be described using Spearman's rank correlation coefficient.
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Baseline and 90 minutes post-stimulation
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Validation of clinical diagnostic score
Aikaikkuna: After test day 2 and 10 weeks thereafter
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Validation of a predefined diagnostic score using clinical and basal parameters
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After test day 2 and 10 weeks thereafter
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Change of urinary copeptin levels
Aikaikkuna: During test day 1 and test day 2 with a maximum of 3 month in between the two test days
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Change in urinary copeptin levels before and after mannitol and hypertonic saline stimulation.
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During test day 1 and test day 2 with a maximum of 3 month in between the two test days
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Optimal urinary copeptin cut-offs
Aikaikkuna: 10 weeks after test day 2
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Exploratory determination of optimal urinary copeptin thresholds for differential diagnosis.
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10 weeks after test day 2
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Sex-specific copeptin response
Aikaikkuna: During test day 1 and test day 2 with a maximum of 3 month in between the two test days and at study completion
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Evaluation of sex-specific differences in stimulated copeptin levels and corresponding diagnostic cut-offs.
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During test day 1 and test day 2 with a maximum of 3 month in between the two test days and at study completion
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Cost-efficiency of diagnostic tests
Aikaikkuna: One time assessment at Follow up Visit 2 (10 weeks after baseline)
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Exploratory assessment of healthcare costs associated with mannitol infusion versus hypertonic saline infusion.
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One time assessment at Follow up Visit 2 (10 weeks after baseline)
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Yhteistyökumppanit ja tutkijat
Tutkijat
- Opintojen puheenjohtaja: Mirjam Christ-Crain, Prof. Dr., University Hospital of Basel
Opintojen ennätyspäivät
Opi tärkeimmät päivämäärät
Opiskelun aloitus (Todellinen)
Ensisijainen valmistuminen (Arvioitu)
Opintojen valmistuminen (Arvioitu)
Opintoihin ilmoittautumispäivät
Ensimmäinen lähetetty
Ensimmäinen toimitettu, joka täytti QC-kriteerit
Ensimmäinen Lähetetty (Todellinen)
Tutkimustietojen päivitykset
Viimeisin päivitys julkaistu (Todellinen)
Viimeisin lähetetty päivitys, joka täytti QC-kriteerit
Viimeksi vahvistettu
Lisää tietoa
Tähän tutkimukseen liittyvät termit
Avainsanat
Muita asiaankuuluvia MeSH-ehtoja
- Urogenitaaliset sairaudet
- Endokriinisen järjestelmän sairaudet
- Patologiset prosessit
- Miesten urogenitaaliset sairaudet
- Munuaissairaudet
- Urologiset sairaudet
- Naisten virtsa- ja sukupuolielinten sairaudet
- Naisten virtsa- ja sukupuolielinten sairaudet ja raskauden komplikaatiot
- Käyttäytymisoireet
- Aivolisäkkeen sairaudet
- Patologiset tilat, merkit ja oireet
- Käyttäytyminen
- Merkit ja oireet
- Polydipsia
- Diabetes Insipidus
- Diabetes Insipidus, Neurogeeninen
- Polydipsia, psykogeeninen
Muut tutkimustunnusnumerot
- 2026-00480;kt25ChristCrain7
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