[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-86477-en":3,"doc-seo-86477-105":30,"detail-sidebar-cat-0-en-105":90},{"code":4,"msg":5,"data":6},0,"success",{"doc_id":7,"user_id":8,"nickname":9,"user_avatar":10,"doc_module":4,"category_id":11,"category_name":12,"doc_title":13,"doc_description":14,"doc_content":15,"file_id":16,"file_url":17,"file_type":18,"file_size":19,"view_count":20,"is_deleted":4,"is_public":21,"is_downloadable":21,"audit_status":21,"page_count":22,"language":23,"language_code":24,"site_id":25,"html_lang":24,"table_of_contents":26,"faqs":27,"seo_title":13,"seo_description":14,"update_tm":28,"read_time":29},86477,687197207639,"Asher","https://ap-avatar.wpscdn.com/davatar_a8503ba1806abce46bf441b54a3ca4cd",8,"Research & Report","Soft Eversion Robots for Colonoscopy: Challenges, Open Problems, and Emerging Solutions","Research examines soft eversion robots for colonoscopy designed to reduce sliding friction and improve patient comfort by using pressure-driven tip growth. The work analyzes four eversion robot architectures, summarizes key clinical anatomical constraints, and benchmarks them against those requirements. Identified gaps include payload delivery limitations and feasibility concerns. Design guidance targets biocompatible, flexible low-stiffness materials and localized tip-based soft steering, while noting that quantitative safe-pressure benchmarks remain an open problem for clinical translation.","Soft Eversion Robots for Colonoscopy: Challenges, Open Problems,  \nand Emerging Solutions  \nCem Suulker, Thomas Mack, Qingzheng Cong, Neri Niccol Dei, Reza Kashef, Mohammad Sheikh Sofla, and Kaspar Althoefer  \nSchool of Engineering and Materials Science, Queen Mary University of London, United Kingdom.  \n[c.suulker@qmul.ac.uk](c.suulker@qmul.ac.uk)  \narXiv :2607 . 10294v1 [ cs .RO] 11 Jul 2026  \nINTRODUCTION  \nConventional colonoscopy remains limited by patient discomfort and procedural risks, motivating research into compliant robotic alternatives [1] . Eversion robots, which advance via pressure-driven tip growth, eliminate sliding friction against the colon wall and offer less intrusive traversal approach. However, no existing design simultaneously satisfies all clinical requirements. This paper examines four colonoscopy application eversion robot architectures, identifies the key trade-offs each reveals, and provides design guidance for future studies. Table I summarises the key anatomical constraints derived from existing datasets [2], [3] against the performance of four recent eversion robot designs [4]–[7] . Specifically colon length of 1.0–2.1 m, minimum luminal diameter of 26 mm in the sigmoid colon, bending angles up to 70° across 3–7 sharp bends, and a 2.3–3.8 mm working channel requirement [8] .  \nCURRENT EVERSION ROBOT SOLUTIONS AND THEIR LIMITATIONS  \nFig. 1 highlights recent eversion robot studies for colonoscopy, while Table I shows that, despite strong overall performance, key limitations remain, particularly in payload delivery.  \nFig. 1a) Eversion robot with multifunctional artificial muscles (green) that can contract upon inflation for bending or to assist with retraction. The base station must be at least the double of maximum length of the robot due to how it retracts, making it at least 2.1 m to reach at around 0 .9 m into the colon. The small camerasits at the tip of the robot without making contact with the colon wall.  \nFig. 1b) A magnetically polarised everting sleeve directed by an external magnet mounted on a robot arm. This eliminates onboard steering complexity but requires precise external magnet positioning, and the robot carries no payload.  \nFig. 1c) A tip-steering device is retained at the tip by interlocking rollers with a rigid cap. The tip steering is performed by soft pneumatic linear actuators. While the tip-steering mechanism allows for bending angles that exceed the requirements for colon navigation, the rigid cap undermines the softness and the feasibility.  \nFig. 1d) An inchworm mechanism inside an eversion robot for bending and repositioning without external rigid fixtures. This approach does not allow for payload delivery. The inchworm itself remains rigid, limiting the diameter of constriction that the robot can pass through.  \nDISCUSSION AND FUTURE DESIGN GUIDANCE  \nMaterial: For colonoscopy applications, the body of theeversion robot must be biocompatible, as it comes into direct contact with the colon wall. The material should also be highly flexible to enable navigation with minimal interaction forces (i.e., low bending stiffness), and low activation pressure so that, in the event of leakage or failure, pressurized air does not risk tissue damage. In this context, recent literature highlights TPU and fabric-based materials as particularly promising for eversion robots, owing to their flexibility and low eversion pressure [3], but quantitative benchmarking of safe eversion pressures against tissue contact damage thresholds remains an open problem for clinical development. Key takeaway: Thin materials, such as TPU or low thickness coated fabrics, should be selected for the robot sleeve to enable low bending stiffness, reduced actuation pressure, and improved navigation performance; both also offer biocompatible options.  \nSteering Strategy: Pre-shaped robots are clinically impractical as they cannot adapt to real-time deformations or varied anatomies. Similarly, rigid steering ","cbCaiu2acwiSYr42","https://ap.wps.com/l/cbCaiu2acwiSYr42","pdf",218336,3,1,2,"English","en",105,"# Introduction\n# Current Eversion Robot Solutions and Their Limitations\n# Discussion and Future Design Guidance\n# Benchmarking of State-of-the-Art Eversion Robots","[{\"question\":\"What problem do eversion robots aim to solve in conventional colonoscopy?\",\"answer\":\"Conventional colonoscopy is limited by patient discomfort and procedural risks. Eversion robots use pressure-driven tip growth to minimize sliding friction against the colon wall and support a less intrusive traversal approach.\"},{\"question\":\"What clinical anatomical requirements are used to benchmark eversion robot designs?\",\"answer\":\"The paper benchmarks against colon length (1.0–2.1 m), minimum luminal diameter in the sigmoid colon (26 mm), maximum bending angles (up to 70° across several sharp bends), and a required working channel size (2.3–3.8 mm).\"},{\"question\":\"What future design guidance does the paper propose for improving eversion robots?\",\"answer\":\"It recommends biocompatible, highly flexible, low-activation-pressure materials to reduce bending stiffness and actuation pressure. It also advises localized tip-based soft steering rather than pre-shaped or rigid steering methods, while highlighting the need for quantitative safe-pressure thresholds for clinical development.\"}]",1784211988,5,{"code":4,"msg":31,"data":32},"ok",{"site_id":25,"language":24,"slug":33,"title":13,"keywords":34,"description":14,"schema_data":35,"social_meta":85,"head_meta":87,"extra_data":89,"updated_unix":28},"soft-eversion-robots-for-colonoscopy-challenges-open-problems-and-emerging-solutions","",{"@graph":36,"@context":84},[37,52,67],{"@type":38,"itemListElement":39},"BreadcrumbList",[40,44,47,49],{"item":41,"name":42,"@type":43,"position":21},"https://docshare.wps.com","Home","ListItem",{"item":45,"name":46,"@type":43,"position":22},"https://docshare.wps.com/document/","Document",{"item":48,"name":12,"@type":43,"position":20},"https://docshare.wps.com/document/research-report/",{"item":50,"name":13,"@type":43,"position":51},"https://docshare.wps.com/document/soft-eversion-robots-for-colonoscopy-challenges-open-problems-and-emerging-solutions/86477/",4,{"url":50,"name":13,"@type":53,"author":54,"headline":13,"publisher":56,"fileFormat":59,"inLanguage":24,"description":14,"dateModified":60,"datePublished":61,"encodingFormat":59,"isAccessibleForFree":62,"interactionStatistic":63},"DigitalDocument",{"name":9,"@type":55},"Person",{"url":41,"name":57,"@type":58},"DocShare","Organization","application/pdf","2026-07-28","2026-07-16",true,{"@type":64,"interactionType":65,"userInteractionCount":20},"InteractionCounter",{"@type":66},"ViewAction",{"@type":68,"mainEntity":69},"FAQPage",[70,76,80],{"name":71,"@type":72,"acceptedAnswer":73},"What problem do eversion robots aim to solve in conventional colonoscopy?","Question",{"text":74,"@type":75},"Conventional colonoscopy is limited by patient discomfort and procedural risks. Eversion robots use pressure-driven tip growth to minimize sliding friction against the colon wall and support a less intrusive traversal approach.","Answer",{"name":77,"@type":72,"acceptedAnswer":78},"What clinical anatomical requirements are used to benchmark eversion robot designs?",{"text":79,"@type":75},"The paper benchmarks against colon length (1.0–2.1 m), minimum luminal diameter in the sigmoid colon (26 mm), maximum bending angles (up to 70° across several sharp bends), and a required working channel size (2.3–3.8 mm).",{"name":81,"@type":72,"acceptedAnswer":82},"What future design guidance does the paper propose for improving eversion robots?",{"text":83,"@type":75},"It recommends biocompatible, highly flexible, low-activation-pressure materials to reduce bending stiffness and actuation pressure. 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