| 1. |
- Grayson, Samuel, et al.
(författare)
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Blood flow dynamics in reconstructed auricles
- 2013
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Ingår i: Journal of Plastic Surgery and Hand Surgery. - 2000-656X. ; 47:4, s. 313-316
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Tidskriftsartikel (refereegranskat)abstract
- Ear reconstruction with autologous rib cartilage is performed in stages. Restitution of blood flow between the separate stages is crucial to obtain a good result. Laser Doppler perfusion imaging (LDPI) and local temperature were measured in reconstructed and normal ears in response to indirect heating. Ten persons who had had a unilateral ear reconstruction were included in the study. At a minimum, 157 days had passed since the last operation. LDPI showed no difference in blood flow between the reconstructed ear and the normal ear, neither before nor after indirect heating. The upper part of the normal ear was slightly cooler than the corresponding part in the reconstructed ear. Indirect heating caused an increase of LDPI-values and temperatures in the upper, middle, and lower part of the ear both in the reconstructed ear and the normal one. Skin blood flow recovers after 3-stage ear reconstruction and shows normal dynamic response upon indirect heating.
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| 2. |
- Öberg, Martin, et al.
(författare)
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A comparison of digital morphometry and clinical measurements of ears.
- 2013
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Ingår i: Journal of Plastic Surgery and Hand Surgery. - 2000-656X. ; 47:4, s. 317-319
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Tidskriftsartikel (refereegranskat)abstract
- Abstract Clinical measurements are necessary in many routine follow-ups and scientific evaluations, but the accuracy of these measurements is seldom challenged. The size of the reconstructed ear is one important parameter in the follow-up regarding patients operated on due to microtia. With the introduction of digital morphometry one was obliged to evaluate its accuracy in comparison to its analogue equivalents. In a first series of measurements the ears of 30 persons were assessed using digital morphometry, compass and ruler, and calliper to test the accuracy of these methods. In a second series of measurements, 10 patients with reconstructed unilateral microtia were assessed with digital morphometry to test the inter-individual variation of this method. The accuracy of digital morphometry was of the same magnitude as the manual methods. When the inter-individual variation of accuracy was assessed in digital morphometry it was found that random error differed from person to person. In scientific settings, for instance when evaluating possible growth of the cartilage framework, the specific individual accuracy must therefore be taken into account in order to draw safe conclusions.
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| 3. |
- Öberg, Martin, et al.
(författare)
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Thermosensitivity in a reconstructed microtic ear.
- 2008
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Ingår i: Scandinavian Journal of Plastic and Reconstructive Surgery and Hand Surgery. - : Informa UK Limited. - 1651-2073 .- 0284-4311. ; 42:4, s. 190-193
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to evaluate thermo-thresholds in autologous reconstructed microtic ears. Nineteen patients with unilateral microtia were investigated no less than two years after the last operation (3.6+/-1.7 years). Their normal corresponding ear acted as controls. Eight healthy children were also investigated to illustrate technical differences between measuring the two sides. Thermal sensitivity was tested quantitatively using a SENSELab MSA Thermotest. The skin temperature was also tested. Three different areas of the ear were examined: the lobe, the antihelix, and the helix. The reconstructed ear had a significantly higher skin temperature for all investigated areas compared with the normal ear (reconstructed ear 30.2+/-1.2 degrees C, normal ear 28.6+/-0.9 degrees C). For the controls there were no significant differences in any area. For the patients there were small differences in perception of cold between the reconstructed and the normal ear. There were significant differences in the antihelix region and the helix in heat perception in the reconstructed ear compared with the normal one (helix reconstructed ear 43.9+/-3.8 degrees C, helix normal ear 38.3+/-3.0 degrees C, antihelix reconstructed ear 39.9+/-3.0 degrees C, antihelix normal ear 36.4+/-1.7 degrees C). The reconstructed ear had a changed thermosensitivity, but there did not seem to be any clinical disadvantages.
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| 4. |
- Öberg, Martin, et al.
(författare)
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Threshold of tactile perception in a reconstructed auricle.
- 2011
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Ingår i: Journal of Plastic Surgery and Hand Surgery. - 2000-656X. ; 45:1, s. 23-27
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Tidskriftsartikel (refereegranskat)abstract
- Abstract There are more important outcome variables than the aesthetic when it comes to a successful result in reconstruction of the ear for microtia. The protective sensitivity, for example, is important to avoid damage to the skin covering the cartilaginous framework. We studied 39 patients with unilateral microtia and recorded their skin sensitivity more than six months after the last operation. The Semmes-Weinstein Monofilament Test (SWMT) was used to assess the threshold of protective sensitivity in three particular areas: the helix, the anthelix, and the lobule. The opposite ear served as control. A monofilament of 4.31 or less was regarded as acceptable protective sensitivity. Thirty-two patients had acceptable sensitivity in the whole ear, but the helix gave a poor result in seven patients and in one of them so did the anthelix.
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