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International Orthopaedics

, Volume 42, Issue 11, pp 2705–2713 | Cite as

Soft tissue micro-circulation in the healthy hindfoot: a cross-sectional study with focus on lateral surgical approaches to the calcaneus

  • John Bennet Carow
  • Juliane Carow
  • Boyko Gueorguiev
  • Kajetan Klos
  • Christian Herren
  • Miguel Pishnamaz
  • Christian David Weber
  • Sven Nebelung
  • Bong-Sung Kim
  • Matthias Knobe
Original Paper
  • 73 Downloads

Abstract

Purpose

Open reduction and internal fixation (ORIF) using an extended lateral approach combined with plate osteosynthesis represents the current gold standard in calcaneal fracture treatment, but it is associated with a wound complication rate of up to 30%. Literature suggests that micro-circulation is one of the key factors for sufficient wound healing. The aim of this study was to evaluate soft tissue micro-circulation of the hindfoot in healthy volunteers to determine influencing factors and to identify hypoxic or hypoperfused areas in non-trauma situations, with special attention to surgical approaches.

Methods

Micro-circulation of the lateral hindfoot of 125 participants was non-invasively measured at 2 and 8 mm depths, utilizing a Micro-Lightguide O2C® spectrophotometer. Blood flow (BF [AU]) and oxygen saturation (SO2 [%]) of ten measurement points (MPs) were documented. Demographic factors (age, gender, body mass index [BMI], systolic/diastolic blood pressure, smoking, and pack-years) and regional differences with special regard to surgical approaches (extended lateral approach, Palmer approach, Ollier approach, and a self-modified extended lateral approach) were analyzed.

Results

The SO2 assessments at 2- and 8-mm depths revealed higher values in males (p = 0.043; p = 0.025). There was a correlation between higher age and lower 2 mm BF (p = 0.044). Smoking history and number of pack-years did not predict micro-circulation. BF at the 2 mm depth was highest in the regions of Palmer and Ollier approach (p < 0.001). The MP at the distal calcaneal tuberosity showed significantly higher values regarding all parameters (SO2 (2 mm), p < 0.001; SO2 (8 mm), p = 0.001; BF (2 mm), p < 0.001; BF (8 mm), p < 0.001), compared to the surrounding area.

Conclusions

In non-trauma situations, young males were associated with better micro-circulatory supply of the lateral hindfoot. There was a trend for higher blood flow in regions of the Palmer and Ollier approach. The distal calcaneal tuberosity was clearly superior in all micro-circulatory parameters when compared to the surrounding area.

Keywords

O2C Micro-circulation Blood flow Soft tissue Hindfoot Calcaneus Surgical approach Wound complication 

Notes

Compliance with ethical standards

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

Ethics committee of the RWTH Aachen University Hospital, ethics approval EK 346/14.

Informed consent

Each author certifies that his or her institution approved the human protocol for this investigation, that all investigations were conducted in conformity with the ethical principles of research, and that informed consent for participation in the study was obtained.

Ethics

EK 346/14

Supplementary material

264_2018_4031_MOESM1_ESM.xls (133 kb)
ESM 1 (XLS 133 kb)

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Copyright information

© SICOT aisbl 2018

Authors and Affiliations

  • John Bennet Carow
    • 1
  • Juliane Carow
    • 1
  • Boyko Gueorguiev
    • 2
  • Kajetan Klos
    • 3
  • Christian Herren
    • 1
  • Miguel Pishnamaz
    • 1
  • Christian David Weber
    • 1
  • Sven Nebelung
    • 4
  • Bong-Sung Kim
    • 5
  • Matthias Knobe
    • 1
  1. 1.Department of Orthopaedic TraumaUniversity of Aachen Medical CenterAachenGermany
  2. 2.AO Research Institute DavosDavosSwitzerland
  3. 3.Department of Foot and Ankle SurgeryCatholic Hospital MainzMainzGermany
  4. 4.Department of RadiologyUniversity of Aachen Medical CenterAachenGermany
  5. 5.Department of Plastic Surgery, Reconstructive and Hand SurgeryUniversity of Aachen Medical CenterAachenGermany

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