A Retrospective Case Series of Minimally Invasive Ponto Surgery In Two
Pediatric Centres
Abstract
Objective: Minimally Invasive Ponto Surgery (MIPS) is a type of bone
anchored hearing system performed through a puncture hole that has been
reported to minimize soft tissue trauma, decrease operative time, and
have favorable outcomes. Due to it being a relatively new procedure
there remains a paucity of pediatric outcomes data. Our objective was to
study MIPS outcomes in the pediatric population. Design: Retrospective
review. Setting: The study was performed at two tertiary pediatric
otolaryngology centres between 2016-2019. Participants: Pediatric
patients from two tertiary pediatric otolaryngology clinics who
underwent MIPS between 2016-2019. Main Outcome Measures: Outcomes
included indication for surgery, implant and abutment type, overlying
skin thickness, skin-to-skin time, Holgers score at three, six and
twelve months, revision surgery and time to abutment fitting. Results
and Conclusions: Fourteen patients, two with bilateral procedures met
inclusion criteria (mean age= 8.07 ± 2.87years). The main etiology for
the hearing loss was microtia (64%). The mean overlying skin thickness
was 5.13 ± 3.18mm. Across all visits, 9.44% had Holger’s scores
>2, which is classified as an adverse skin reaction. One of
these patients required surgery to address skin overgrowth. One implant
loss (6.3%) was reported, but found to be in the setting of trauma.
Mean MIPS Skin to skin times were found to be 12.4 ± 2.6 minutes,
markedly different that the Baha® Attract and Connect found to be 56 and
53 minutes respectively. This study represents the largest pediatric
MIPS cohort to date, and our results are similar to published adult
studies.