Global volume of knee arthroscopy surgeries

This blog post is an update to my earlier Twitter thread in which I presented trends of knee arthroscopy procedures in different countries. Full thread about arthroscopic partial meniscectomy (APM) can be found here. Finally, how has the orthopaedic community responded to this bulk of evidence? Not as would be expected. Further studies are urgently […]

Population health and orthopaedic surgeries

Both knee arthroscopy for partial meniscectomy and shoulder arthroscopy for acromioplasty were very common procedures few years back in orthopaedic surgery. During the first two decades of this millennium extensive amount of research has been published showing that the effect of these procedures to treat knee and shoulder pain and function is quite weak. Despite […]

Post-hoc power – Alone in the universe

Prologue Firstly, it is important to describe what post-hoc power really means. Post-hoc power is the power of the test using effect size observed and sample size used in the study. For this reason post-hoc power is often labeled as observed power. If for any experiment the effect size, parameter estimates and sample size is […]

Metal-on-metal hips on the Gartner Hype Cycle

This post describes an adaptation of Gartner Hype Cycle on metal-on-metal hip replacements. It is very unlikely that MoM hip replacements will achieve the “Plateau of Productivity“. Therefore two other later stages are proposed with annotations. Reference 1. Harris WH. Osteolysis and particle disease in hip replacement. A review. Acta Orthop Scand. 1994 Feb;65(1):113-23. 2. […]

Metal-on-metal hip resurfacings and the year 2019

Hellman et al. addressed the proposed advantages of metal-on-metal (MoM) hip resurfacings (HR) over tradition total hip replacements (THR) in their recent systematic review. There has been relative paucity in the literature regarding positive studies in MoM HRs. Some single surgeon and single center studies have been published, but in general, the study by Hellman […]