# NaviToolHip > NaviToolHip (iPhone/iPad app by ORTHOPRACTIS.COM SINGLE MEMBER P.C..) - Source: https://appshunter.io/ios/app/navitoolhip/id1481214099 (this page in markdown: same URL + `.md`) - Developer: [ORTHOPRACTIS.COM SINGLE MEMBER P.C.](https://appshunter.io/developer/1286360877) - Category: Medical, Productivity - Price: $79.99 (on sale, was $249.99) - Age rating: 17+ - Requires: iOS 16.1 · 2 MB - Languages: American English - Released: 2019-11-05 - Data updated: 2026-08-17 - User reviews in markdown: https://appshunter.io/ios/app/navitoolhip/id1481214099/reviews.md ## What is NaviToolHip? Good surgical technique and accurate implantation of the acetabular cup component improve the longevity and function of Total Hip Arthroplasty(THA). Malposition- outside safe zone increases the risk of complications namely decreased range of movements, increased rates of impingement, increased wear rates, recurrent dislocations, osteolysis, ‘squeaking’, leg-length discrepancy, and early failure rates. Placement of the acetabular cup during surgery can be performed by using free hand technique and or by alignment support frames on the Inserter. The surgeon try to navigate by taking into account the position of the frames relatively with surgical bed plane. Acetabular cup orientation based on surgeon’s visual assessment and experience could result in an inaccurate placement. Computer-assisted navigation system is proven that they improve the precision in cup position. Apple developed and popularised (AR) Augmented Reality technology readily available for its devices. The application take advantage of Augmented reality and merges it with Computer Assisted Orthopaedic Surgery (CAOS) techniques and principles in effort to help an orthopaedic surgeon during operation without the need of expensive CAOS equipment. The App is medical App software aimed for orthopaedic surgeons, providing a tool that allows the surgeon to expedite the procedure of cup positioning effortlessly by following below these steps -by registering, with the tip of iPhone-Case-Probe instrument certain anatomical landmarks, to see in Augmented Reality all 3D planes with different transparent colours (sagittal-blue, coronal-red transverse-green), a transparent sphere appears inside the real acetabulum centred over the centre of hip rotation and also in augmented reality the bony pelvis appears over the screen. -by attaching the Case-Probe to certain clamp and attaching to the reamer or later to inserter, the surgeon can be oriented by observing in real time over the phones screen, six angles, Operative Anteversion (OA) and Inclination (OI), Radiographic Anteversion (RA) and Inclination (RI), Anatomical Anteversion (AA) and Inclination (AI) respectively . -by observing in real time all angles, changing the direction of the reamer or inserter the surgeon can adjust the position of the cup respectively, aiming the final Implant orientation to be inside the new redefined safe zone- adjusted by patient-specific pelvic tilt-(Operative inclination (OI) 43°±12°, anteversion (OA) 31°± 8°). During surgery, as long as the measured values of OI and OA are inside the above mentioned normal range, the printed colour in screen remains green, otherwise are printed in red colour. -During surgery, as long as the measured values of RI and RA are between normal range, the printed colour in screen remains green, otherwise are printed in red colour. -QR-code Image attached over Passive Sensor acts as a dynamic reference base, the app updates the position of registered points in AR according to the new position of patient pelvis respectively without to reregister. -Pelvic tilt is measured as anterior pelvic plane (APP) Angle and printed over screen. Its value is used for the calculation of anteversion and inclination of above mentioned angles and respectively adjusted. -The acetabular axis is presented as rod in AR, perpendicular to acetabular rim circumference.The respective angles of inclination and antevesion between the acetabular axis and projected planes are also measured -Acetabular dimension is also printed in mm allowing the surgeon to decide in advance the size of starting reamer. Reference  1. Murphy AB and & The Safe Zone Range for Cup Anteversion Is Narrower Than for Inclination in THA William S. Clin Orthop Relat Res 2018; 476:325-335. 2. Ogawa H, et al. A Pilot Study of Augmented Reality Technology Applied to the Acetabular Cup Placement During Total Hip Arthroplasty.J Arthroplasty. (2018) Jun;33(6):1833-1837. ## Version history (last 5 releases) ### 6.0 — 2022-11-12 update for 16.1 bugs fixed ### 5.0 — 2020-11-18 -a QR-code Image attached over Passive Sensor acts as a dynamic reference base added, by accidental change of pelvis position intra-operatively the app updates the position of registered points in AR according to the new position of patient pelvis respectively without to reregister. -to reduce the error during registration of anatomical point, three point should be registered in space around the region of interest in order to define the final registered point - a centroid- respectively ### 4.0 — 2020-09-27 Update to 14.0 iOS also -Calibration now is Independent from iPhone Model settings device. -Added Calibration for X, Y, Z buttons work also in dynamic environment -new function transforming and dynamically changing their geometry Adding a new function to transform spheres and cylinders dynamically and change their geometry - Add the GO button for a smooth transition to the dynamic environment (avoid sudden jumps) -The acetabular axis is presented as rod in AR, perpendicular to acetabular rim circumference.The respective angles of inclination and antevesion between the acetabular axis and projected planes are also measured . - Add buttons for dynamic tool shaft length change. (L) ### 3.0 — 2020-04-05 -undo and calibration buttons enlarged -The method of selection the registration points of the Superior Iliac Spines (ASIS) (P4,P5) and symphysis pubis (P6), by selecting three points over the region of interest each time, is different, in an effort to reduce the positional registration error by simply selecting only one point for each time respectively. For every three points of registration - three green spheres appears and in the centroid position between these points in space a light blue sphere appears which represents the final registration point of interest. -A grey cylinder appears starting from centre of rotation of patient acetabulum - the acetabulum axis of the patient acetabulum- the static values of OI-Operative Inclination OA-Operative AnteversionRI-Radiographic inclination RA-Radiographic Anteversion AA-Anatomical Inclination AA-Anatomical anteversion are measured and printed over the screen in parentheses before the dynamic values respectively. ### 2.0 — 2020-01-12 -updated and optimised the calibration procedure namely positional calibration of pointer tip sphere in AR can be easily done by allowing the user to adjust the XYZ position of the pointer tip sphere by pressing the appropriate buttons accordingly. This feature enhanced the accuracy of App while making easily available to every i-phone model. -Point button removed so simply touching the screen the points are registred. -Pelvic tilt makes common navigation systems referring to the anterior plane inaccurate. The patient-specific pelvic tilt is incorporated in measurements and thus calculated tilt-adjusted values of anteversion and inclination (operative, anatomic, radiographic). This offers major advance compared to manual or common very expensive navigational systems by eliminating completely the innate errors of pelvic tilt. -The new redefined the safe zone according to pelvic tilt are taken into account and added in calculations( Murphy AB and & The Safe Zone Range for Cup Anteversion Is Narrower Than for Inclination in THA William S. Clin Orthop Relat Res (2018) 476:325-335 ). -Pelvic tilt is measured as anterior pelvic plane (APP) Angle and printed with - or + values. ## Apps similar to NaviToolHip | App | Rating | Price | Category | | --- | --- | --- | --- | | [Spectrum CareHub](https://appshunter.io/ios/app/spectrum-carehub/id1498124140) | — | Free | Medical | | [e-Recepty. 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User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-17.*