Implant Insertion Time and Incision Length in Breast Augmentation Surgery with the Keller Funnel: Results from a Comparative Study
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The Keller funnel is an easy-to-use mechanical device that aids breast implant insertion. This study analyzed implant insertion time and incision length using the Keller funnel versus conventional manual insertion.
This was an analysis of two cohorts of adult patients undergoing primary breast augmentation with anatomical implants at a single center. In the ‘insertion time cohort’ (N = 20), implants were inserted with a Keller funnel on one side and manually on the other; follow-up lasted 4 years. In the ‘incision length cohort,’ both implants were inserted with a Keller funnel (N = 50) or manually (N = 50), with follow-up lasting 12 months.
In the insertion time cohort, mean total insertion time (from implant sterile-package opening to final positioning in the pocket) was 35 s (range 13–76 s) with the Keller funnel and 25 s (range 13–43 s) using manual insertion (p = 0.07); the mean time needed to push the implant through the incision was 6 s (range 3–10 s) with the Keller funnel and 16 s (range 13–40 s) with manual insertion (p = 0.04). In the incision length cohort, mean incision length was shorter with the Keller funnel versus manual insertion (35.5 ± 2.1 mm vs. 46.2 ± 3.2 mm; p < 0.001). There were no differences in complications based on insertion method.
The Keller funnel was associated with decreased incision length and reduced time to push the implant through the incision. This brings potential clinical advantages in minimizing scarring and reducing contamination of the device.
Level of Evidence III
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KeywordsBreast augmentation Breast implantation Incision length Insertion sleeve Keller Funnel
We would like to thank Dr. Timothy Ryder from Biological Communications Limited for editorial assistance, funded by Allergan. Allergan had no input into the content of the paper.
All authors participated in study conduct, data collection, and writing of the manuscript, and all approved the final draft.
Compliance with Ethical Standards
Conflict of interest
Dr. Montemurro is a consultant and speaker for Allergan. Dr. Fischer and Dr. Schyllander report nothing to disclose. Dr. Mallucci is a shareholder in B-Lite (Polytech). Dr. Hedén has had consultancy agreements with Allergan, Mentor, Establishment Labs, G&G Medical and GC Aesthetics, is a shareholder in Polytech and Establishment Labs, and has a Development Contract with Allergan.
The study was conducted in accordance with the Declaration of Helsinki.
All patients provided written informed consent before surgery.
Supplementary file1 (MP4 7095 kb)
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