VAVASC study

An international multi-centre collaborative observational study to prospectively validate in practice the AVAS classification of vascular access options

[Stephen O'Neill @stephenconeill]

1/ Vascular access is needed for haemodialysis. Ultrasound mapping is routinely used to establish vascular access options but often a long complex list of measurements are reported. This🧵describes how we’ve tried to simplify this info

[Stephen O'Neill @stephenconeill]

The AVAS classification simplifies communication of vascular access options. In our latest paper from ⁦@VavascS⁩ in ⁦@SciReports⁩ AVAS is further validated in comparison to ultrasound mapping by predictive modelling using machine learning https://t.co/OtdoEtQNjw

[Stephen O'Neill @stephenconeill]

Thanks to all @VavascS collaborators for their hard work and @BelfastTrust PA Program for funding my time on this project. A great 1st publication from this unique dataset for PhD candidate Kate Lawrie & hopefully much more to come! @PeterBalaz1975 @emmaaitken_emma @MarioDOria14

[CKJ @CKJsocial]

Validation of Arterio Venous Access Stage (AVAS) classification

https://t.co/We0YVgS8Yq

AVAS is effective in predicting VA creation but overall accuracy is reduced at higher AVAS classes when the complexity of decision-making increases and proximal vessels require preservation.

[VAVASC study @VavascS]

🚨@VavascS has reached the recruitment target of 1000 patients! We are continuing recruitment as planned until the end of 2023. It is not too late to join the study!

[Stephen O'Neill @stephenconeill]

@DamianFog @shivadas29 @wasse_m @robshahverdyan @nick_inston @jimbog_76 @JeremyCraneMD @ASDINNews @VASAMD Thanks @DamianFog, in cases like this the ArterioVenous Access Stage (AVAS, https://t.co/zGDLYm10mF) is useful to communicate simply the options on the other arm (see @VavascS). If AVAS 2/3 then aneursymorrhaphy is an option. If AVAS 1 then perhaps a new fistula and ligate this.

[VAVASC study @VavascS]

There are now 10 centres involved in @VavascS and we’re on track to meet the recruitment target of 1000 patients by the end of 2023. It’s not too late to register and join the authorship team of @stephenconeill @emmaaitken_emma @PeterBalaz1975 @MarioDOria14 and others

[VAVASC study @VavascS]

Welcome to @NHSGGC who are the 9th centre to take part in @VavascS We are looking forward to working with @emmaaitken_emma and the rest of the team!

[VAVASC study @VavascS]

Fast approaching 700 patients in @VavascS!

[Stephen O'Neill @stephenconeill]

Great week in Prague with @PeterBalaz1975, Kate Lawrie, Petr Waldauf, Jan Bafrnec, Adam Whitley and Slavo! Discussing @VavascS and seeing the amazing work their team is doing. Followed by weekend trip to Xmas markets with @Michelle_SLT and the kids!

[VAVASC study @VavascS]

Welcome to @VavascS António Gomes and team from Amadora in Portugal. There are now 7 centres participating and 535 patients recruited to this vascular access study. We are recruiting up until 2024. So plenty of time left to get involved! @karensara77 @emmaaitken_emma @vigitil

[VAVASC study @VavascS]

Recruitment is on track with 455 patients now included in @VavascS. It is not too late to join the study! All centres involved receive regular reports of their own unit results and outcomes.

[Stephen O'Neill @stephenconeill]

Free access to our scoping review of assessment methods of competence of general surgical trainees. Great work by Lauren Hackney to publish her @QUBMedEd MSc dissertation https://t.co/fJBc77ROpI

[VAVASC study @VavascS]

We began recruiting 1 year ago in March 2021. With 324 patients included we're about a 1/3 of the way to our target of 1000 patients and due to finish on schedule in 2024. The study is still open and new centres are hopefully coming on board soon @MarioDOria14 @emmaaitken_emma

[VAVASC study @VavascS]

We are still looking for vascular access centres to participate in @VavascS! Nearly 300 patients have now been enrolled in the past year across 5 centres (Prague, Belfast, Košice, Salvador and Wroclaw) in 2021. Lets build the network for @VavascS and future studies!

[VAVASC study @VavascS]

There is steady recruitment to @VavascS! Get involved via https://t.co/fkbXxc9rqO or contact @stephenconeill @PeterBalaz1975. If you routinely map prior to fistula formation, it will involve only 2 mins extra work per patient. Check out the study protocol;
https://t.co/eZ03PVH3XG

[Stephen O'Neill @stephenconeill]

Clinical trial protocol for @VavascS
https://t.co/saeTqV5fCZ

[VAVASC study @VavascS]

There are now 155 patients included in @VavascS! Please get in touch with @PeterBalaz1975 or @stephenconeill if you would like access to the protocol or to participate in this multicentre study

[Stephen O'Neill @stephenconeill]

Clinical trial protocol for @VavascS
https://t.co/saeTqV5fCZ

[VAVASC study @VavascS]

We now have 4 participating centres recruiting to the VAVASC study!

[VAVASC study @VavascS]

For more information on how to participate visit https://t.co/fkbXxc9rqO or email [email protected]!

[Stephen O'Neill @stephenconeill]

Great to see that centres in Northern Ireland, Slovakia and now Brazil are recruiting to @VavascS