Within-Session Repeatability of EUS-Guided Portal Pressure Gradient Measurement (REPEAT-PPG)
Within-Session Repeatability and Inter-Operator Reproducibility of EUS-Guided Portal Pressure Gradient Measurement: A Prospective Multicentre Study
This prospective multicentre observational reliability study will determine how much a repeated endoscopic ultrasound-guided portal pressure gradient (EUS-PPG) measurement differs from the first measurement in the same patient during the same procedural session. Each participant will undergo two complete EUS-PPG measurement sets using an identical 22-gauge measurement setup. The study will quantify within-session repeatability when the same expert performs both sets and inter-operator reproducibility when different operators perform the sets.
研究概览
详细说明
Consecutive adults with an independently established clinical indication for EUS-PPG will be enrolled at five centres. The clinically indicated first measurement will be followed by a research-only second complete measurement set during the same sedation episode, without an intervention between sets. After the first set, the system will be flushed, the needle withdrawn from the liver, the system recalibrated, and the portal and hepatic veins punctured again for fresh triplicate readings. The interval between sets is targeted at 10 minutes or less. Two techniques of withdrawal are allowed. One technique includes transcapsular re-puncture. The needle is flushed and fully retracted from the liver. The other technique includes subcapsular retraction. The needle is flushed and withdrawn into the liver parenchyma to a position immediately beneath the capsule, without crossing it, so that no further capsular puncture is performed. Procedure lists will be cluster-randomised according to examination lists to one of three operator configurations: the same expert performs both sets, two different experts perform the sets, or an expert and a trainee under supervision perform the sets. The order within each pair will be randomised. Clinical decisions will be based exclusively on the first measurement set. Participants will undergo safety follow-up through day 30.
研究类型
注册 (估计的)
联系人和位置
学习联系方式
- 姓名：Michael Praktiknjo, MD PhD
- 电话号码：+49 251 83 44826
- 邮箱：michael.praktiknjo@ukmuenster.de
研究联系人备份
- 姓名：Dominik van de Loo, MD
- 电话号码：+49 251 83 44476
- 邮箱：dominikjulian.vandeloo@ukmuenster.de
学习地点
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Quebec
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Montreal、Quebec、加拿大
- McGill University Health Centre
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接触：
- Amine Benmassaoud, MD
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Montreal、Quebec、加拿大
- Centre hospitalier de l'Université de Montréal (CHUM)
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接触：
- Philippe Willems, MD
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North Rhine-Westphalia
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Münster、North Rhine-Westphalia、德国、48149
- University Hospital Muenster
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接触：
- Michael Praktiknjo, MD PhD
- 电话号码：+49 251 83 44826
- 邮箱：michael.praktiknjo@ukmuenster.de
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Lazio
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Rome、Lazio、意大利、00168
- Fondazione Policlinico Universitario Agostino Gemelli IRCCS
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接触：
- Francesco Santoapolo, MD
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Leuven、比利时
- UZ Leuven
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接触：
- Wim Laleman, MD PhD
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参与标准
资格标准
适合学习的年龄
接受健康志愿者
有资格学习的性别
取样方法
研究人群
Consecutive adult patients with an independently established clinical indication for EUS-guided portal pressure gradient measurement, including patients with and without clinically significant portal hypertension.
描述
Inclusion Criteria:
- Age 18 years or older
- Clinical indication for EUS-guided portal pressure gradient measurement established independently of the study
- Written informed consent, including consent for the additional measurement set
Exclusion Criteria:
- Contraindication to endoscopy, sedation, or endosonography-guided vascular puncture
- Non-correctable coagulation disorder
- Hemodynamic instability at the time of the procedure
- Any intervention between the two measurement sets that may alter portal pressure, including fluid administration beyond maintenance requirements, vasoactive substances, paracentesis, or variceal band ligation
- Technically non-evaluable first measurement set
- Pregnancy or breastfeeding
- Inability to provide informed consent
学习计划
研究是如何设计的？
设计细节
- 观测模型：COHORT
- 时间观点：PROSPECTIVE
队列和干预
团体/队列 |
干预/治疗 |
|---|---|
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Same expert operator
Both complete measurement sets are performed by the same expert operator. |
During a clinically indicated EUS-PPG procedure, each participant undergoes a second complete EUS-PPG measurement set in the same session. For each set, pressures in a hepatic vein and an intrahepatic portal vein branch are measured in triplicate using the same 22-gauge measurement chain. Before the repeat set, the system is flushed, the needle is withdrawn with one of the allowed techniques, the transducer is recalibrated, and the target vessels are independently re-identified and punctured. No treatment or portal-pressure-altering intervention occurs between the two sets. |
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Two expert operators
The two complete measurement sets are performed by two different expert operators, with order randomised. |
During a clinically indicated EUS-PPG procedure, each participant undergoes a second complete EUS-PPG measurement set in the same session. For each set, pressures in a hepatic vein and an intrahepatic portal vein branch are measured in triplicate using the same 22-gauge measurement chain. Before the repeat set, the system is flushed, the needle is withdrawn with one of the allowed techniques, the transducer is recalibrated, and the target vessels are independently re-identified and punctured. No treatment or portal-pressure-altering intervention occurs between the two sets. |
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Expert and trainee operators
One complete measurement set is performed by an expert and the other by a trainee under direct supervision, with order randomised. |
During a clinically indicated EUS-PPG procedure, each participant undergoes a second complete EUS-PPG measurement set in the same session. For each set, pressures in a hepatic vein and an intrahepatic portal vein branch are measured in triplicate using the same 22-gauge measurement chain. Before the repeat set, the system is flushed, the needle is withdrawn with one of the allowed techniques, the transducer is recalibrated, and the target vessels are independently re-identified and punctured. No treatment or portal-pressure-altering intervention occurs between the two sets. |
研究衡量的是什么？
主要结果指标
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
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Within-session repeatability coefficient of EUS-PPG measured by the same expert operator
大体时间：During the index EUS-PPG procedure
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The repeatability coefficient will be calculated as 2.77 multiplied by the within-subject standard deviation of paired EUS-PPG measurements in the same-expert group. It will be reported in mmHg and as a percentage of the cohort mean, with a 95% confidence interval. |
During the index EUS-PPG procedure
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次要结果测量
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
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Inter-operator reproducibility coefficient of EUS-PPG
大体时间：During the index EUS-PPG procedure
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The reproducibility coefficient will be estimated from paired EUS-PPG differences when different operators perform the two measurement sets and will be reported in mmHg and as a percentage, with a 95% confidence interval. |
During the index EUS-PPG procedure
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Variance components of repeated EUS-PPG measurements
大体时间：During the index EUS-PPG procedure
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A mixed-effects model using all individual readings will estimate patient-, procedure-list-, operator-, measurement-set-, and reading-level variance components. |
During the index EUS-PPG procedure
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Intraclass correlation coefficient for paired EUS-PPG measurements
大体时间：During the index EUS-PPG procedure
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Two-way absolute-agreement intraclass correlation coefficients will be reported overall and by operator configuration with 95% confidence intervals. |
During the index EUS-PPG procedure
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Bland-Altman agreement of paired EUS-PPG measurements
大体时间：During the index EUS-PPG procedure
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Bias and 95% limits of agreement will be calculated overall and separately by operator pairing. |
During the index EUS-PPG procedure
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Discordant classification at portal pressure gradient thresholds of 10 mmHg and 12 mmHg
大体时间：During the index EUS-PPG procedure
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The proportion of participants whose classification crosses the 10-mmHg or 12-mmHg threshold between the two measurement sets will be reported. |
During the index EUS-PPG procedure
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Procedure-associated adverse events
大体时间：From the index procedure through 30 days
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Adverse events will include bleeding, pain, hemoglobin decrease, sedation-related events, unplanned admission or prolongation of stay, transfusion, and unplanned intervention. |
From the index procedure through 30 days
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合作者和调查者
出版物和有用的链接
一般刊物
- Walter SD, Eliasziw M, Donner A. Sample size and optimal designs for reliability studies. Stat Med. 1998 Jan 15;17(1):101-10. doi: 10.1002/(sici)1097-0258(19980115)17:13.0.co;2-e.
- Bland JM, Altman DG. Statistical methods for assessing agreement between two methods of clinical measurement. Lancet. 1986 Feb 8;1(8476):307-10.
- Groszmann RJ, Wongcharatrawee S. The hepatic venous pressure gradient: anything worth doing should be done right. Hepatology. 2004 Feb;39(2):280-2. doi: 10.1002/hep.20062. No abstract available.
- Bonett DG. Sample size requirements for estimating intraclass correlations with desired precision. Stat Med. 2002 May 15;21(9):1331-5. doi: 10.1002/sim.1108.
- Reverter E, Blasi A, Abraldes JG, Martinez-Palli G, Seijo S, Turon F, Berzigotti A, Balust J, Bosch J, Garcia-Pagan JC. Impact of deep sedation on the accuracy of hepatic and portal venous pressure measurements in patients with cirrhosis. Liver Int. 2014 Jan;34(1):16-25. doi: 10.1111/liv.12229. Epub 2013 Jun 13.
- de Franchis R, Bosch J, Garcia-Tsao G, Reiberger T, Ripoll C; Baveno VII Faculty. Baveno VII - Renewing consensus in portal hypertension. J Hepatol. 2022 Apr;76(4):959-974. doi: 10.1016/j.jhep.2021.12.022. Epub 2021 Dec 30.
- Kottner J, Audige L, Brorson S, Donner A, Gajewski BJ, Hrobjartsson A, Roberts C, Shoukri M, Streiner DL. Guidelines for Reporting Reliability and Agreement Studies (GRRAS) were proposed. J Clin Epidemiol. 2011 Jan;64(1):96-106. doi: 10.1016/j.jclinepi.2010.03.002. Epub 2010 Jun 17.
- International Organization for Standardization. ISO 5725-1:1994. Accuracy (trueness and precision) of measurement methods and results. Part 1: General principles and definitions. Geneva: ISO; 1994.
- Keiding S, Vilstrup H. Intrahepatic heterogeneity of hepatic venous pressure gradient in human cirrhosis. Scand J Gastroenterol. 2002 Aug;37(8):960-4. doi: 10.1080/003655202760230946.
- Tandon P, Ripoll C, Assis D, Wongcharatrawee S, Groszmann RJ, Garcia-Tsao G. The interpretation of hepatic venous pressure gradient tracings - excellent interobserver agreement unrelated to experience. Liver Int. 2016 Aug;36(8):1160-6. doi: 10.1111/liv.13065. Epub 2016 Feb 8.
- Bai W, Al-Karaghouli M, Stach J, Sung S, Matheson GJ, Abraldes JG. Test-Retest Reliability and Consistency of HVPG and Impact on Trial Design: A Study in 289 Patients from 20 Randomized Controlled Trials. Hepatology. 2021 Dec;74(6):3301-3315. doi: 10.1002/hep.32033. Epub 2021 Aug 15.
研究记录日期
研究主要日期
学习开始 (估计的)
初级完成 (估计的)
研究完成 (估计的)
研究注册日期
首次提交
首先提交符合 QC 标准的
首次发布 (实际的)
研究记录更新
最后更新发布 (实际的)
上次提交的符合 QC 标准的更新
最后验证
更多信息
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