828 kHz retinal imaging with an 840†nm Fourier domain mode locked laser.

This paper presents a Fourier domain mode locked (FDML) laser centered around 840 nm. It features a bidirectional sweep repetition rate of 828 kHz and a spectral bandwidth of 40 nm. An axial resolution of ∼9.9 µm in water and a 1.4 cm sensitivity roll-off are achieved. Utilizing a complex master-slave (CMS) recalibration method and due to a sufficiently high sensitivity of 84.6 dB, retinal layers of the human eye in-vivo can be resolved during optical coherence tomography (OCT) examination. The developed FDML laser enables acquisition rates of 3D-volumes with a size of 200 × 100 × 256 voxels in under 100 milliseconds. Detailed information on the FDML implementation, its challenging design tasks, and OCT images obtained with the laser are presented in this paper.

Postoperative radiotherapy delay in head and neck cancer patients undergoing major resection and free flap reconstruction.

BACKGROUND: Delays to postoperative radiotherapy (PORT) are frequent and associated with poorer oncologic outcomes in head and neck cancer (HNC) patients. Free flap patients have been suggested as the most at-risk group. Thus, PORT delivery experienced by HNC patients who required a free flap reconstruction was analysed, identifying reasons for the delays if any. METHODS: A retrospective analysis of a single tertiary unit's PORT delivery to HNC patients undergoing major resection followed by free flap reconstruction between 2017 and 2020. RESULTS: Eighty-seven patients were identified. Thirty-two patients received PORT within 6 weeks of their surgery date. Reasons for the delays could be categorised into surgery-derived, system-derived and patient-derived reasons. Five patients (5.74%) received PORT >6 weeks after their surgery due to surgical complications. No patients experienced surgical complications during their PORT. CONCLUSION: In our experience, surgical aspects of free flap reconstructions do not appear to overtly delay or interrupt PORT.

"Z-plasty" modification of ulnar-based fasciocutaneous flap for closure of the radial forearm flap donor defect.

The radial forearm flap is a commonly used method of intra-oral reconstruction, but problems with the donor site are not uncommon. In an attempt to avoid complications, Elliot et al described the use of an ulnar-based flap to obtain direct closure. Where it was not possible to close the proximal defect using V-Y closure, the use of a split skin graft was recommended. We describe a modification of their technique that can potentially obviate the need of a split skin graft when proximal closure is not possible.

The Newcastle flip operation for bilateral cleft lip muscle repair.

Repair of bilateral cleft lip is a challenging operation as the prolabium and premaxilla can be very protrusive. We present a simple one stage technique allowing functional repair of bilateral cleft lip.

22q11 Deletion in children with cleft lip and palate--is routine screening justified?

OBJECTIVE: To ascertain the prevalence of 22q11 deletion in children with a diagnosis of cleft lip and/or palate that had been referred to the Cleft Lip & Palate Service, Newcastle-upon-Tyne. DESIGN: Retrospective analysis of results of 22q11 FISH testing performed in all such referrals. PARTICIPANTS: 191 children, of whom 13 had a bilateral cleft lip and palate, two had a median cleft, 77 had a cleft palate only, 44 had a unilateral cleft lip, 47 had a unilateral cleft lip and palate and eight had a submucous cleft palate. RESULTS: nine patients had a positive 22q11 FISH test. CONCLUSION: This represents a higher percentage than has been previously reported. All children with cleft lip and/or palate should routinely have a 22q11 FISH test in view of the implications of a diagnosis of velocardiofacial syndrome.