Reconstruction of columella and nasal vestibuli by bilateral nasolabial flaps - A case report.

INTRODUCTION AND IMPORTANCE: The nose is a common location for non-melanoma skin cancers. Resection of such cancers can result in large, multilayer defects that are challenging to reconstruct. The surgical approach is determined by multiple factors and the main goal is to obtain a satisfactory functional and aesthetic result. We present a case of reconstruction of the nasal vestibuli and columella by two transnasal nasolabial flaps. PRESENTATION OF CASE: A 66-year-old male underwent resection of a large squamous cell carcinoma in the right nasal vestibulum that extended through the columella into the left vestibulum. The resection resulted in a multilayer defect including the floor and roof of the right vestibulum, the entire columella, part of the septum cartilage and floor of the left vestibulum. The defect was reconstructed in two stages by bilateral nasolabial flaps, that were brought into the nasal cavity through incisions on the side of the nose and were used to line the vestibuli and sutured to each other medially to form the neocolumella. No complications or surgical site infections were observed. CLINICAL DISCUSSION: Transnasal nasolabial flaps can be used for larger columellar defects. The length of the flaps in our case provided enough tissue to reconstruct the columella as well as the entire vestibular linings. CONCLUSION: We describe a successful reconstruction of the nasal vestibuli and columella with two transnasal nasolabial flaps, which provided an acceptable aesthetic and functional result.

[Artificial intelligence in Danish healthcare].

Artificial intelligence (AI) and machine learning have become important in medicine as shown in this review. Automatic tools can be trained to analyse patient data and thereby be a great asset to doctors when diagnosing and treating patients. Denmark is a leading country in collecting data. Having large amounts of stored data improves the quality when building a prediction tool. Due to the potential of building AI in the Danish healthcare sector, a significant amount of money has been allocated to foster new innovations in the field. Denmark could play a critical rule utilising data and implementing AI in medicine.

Biomechanical characterization and comparison of different aortic root surgical techniques.

OBJECTIVES: Understanding the biomechanical impact of aortic valve-sparing techniques is important in an era in which surgical techniques are developing and are increasingly being used based on biomechanical understanding that is essential in the refining of existing techniques. The objective of this study was to describe how the valve-sparing remodelling (Yacoub) and reimplantation (David Type-1) techniques affect the biomechanics of the native aortic root in terms of force distribution and geometrical changes. METHODS: Two force transducers were implanted into 22 pigs, randomized to 1 of 3 groups (David = 7, native = 7 and Yacoub = 8) along with 11 sonomicrometry crystals and 2 pressure catheters. Force and geometry data were combined to obtain the local structural stiffness in different segments of the aortic root. RESULTS: The radial structural stiffness was not different between groups (P = 0.064) at the annular level; however, the David technique seemed to stabilize the aortic annulus more than the Yacoub technique. In the sinotubular junction, the native group was more compliant (P = 0.036) with the right-left coronary segment than the intervention groups. Overall, the native aortic root appeared to be more dynamic at both the annular level and the sinotubular junction than both intervention groups. CONCLUSIONS: In conclusion, the David procedure may stabilize the aortic annulus more than the Yacoub procedure, whereas the leaflet opening area was larger in the latter (P = 0.030). No difference (P = 0.309) was found in valve-opening delay between groups. The 2 interventions show similar characteristics at the sinotubular junction, whereas the David technique seemed more restrictive at the annular level than the Yacoub technique.