No abstract

Background Reprocessing of endoscopes becomes increasingly complex, due to rising demands of hygiene. Established methods are often expensive/time-consuming. Recent studies suggest beneficial aspects of disinfection by UV light. In this study we analyzed the efficiency of UV light disinfection of rigid otorhinolaryngological endoscopes. Materials and methods After mechanical pre-cleaning, the endoscopes were decontaminated for 25 s in the D25 using Impelux™ UV C light technology (UV Smart B.V., Delft, The Netherlands). First, the surface contact samples were taken from 50 used endoscopes to evaluate the bacterial load. Additionally, surface contact samples were taken from further 50 used endoscopes after reprocessing with the D25. Another 50 endoscopes were tested on protein residuals. Furthermore, the absolute effectiveness of the D25 was tested on 50 test bodies (RAMS) with a standardized contamination of 10 7 colonyforming units (CFU) of Enterococcus faecium. Results The used endoscopes showed a high bacterial contamination with an average value of 66.908 (± 239.215) CFU. After reprocessing, only a minimal contamination on 10% (n = 5) of the endoscopes with a mean value of 0.12 CFU (± 0.39) was found, resulting in a log-5 reduction in a clinical environment. The documented bacteria were components of the normal skin flora. All tested endoscopes were practically protein-free (< 1 μg). Furthermore, the average absolute germ reduction of the D25 was about 10 6 CFU on the tested RAMS. Conclusion The D25 UV light system seems to be an effective device for the reprocessing of rigid ORL endoscopes, and therefore, might be suitable for the usage in clinical practice on site.

The RP is a safe procedure with no significant difference in FNP rates when compared to the AP and, considering the shorter CST and the lesser VHT resected in the RP, it is superior to the AP. Surgeons engaged in parotidectomy should be familiar with both methods of dissection.

Background Reprocessing of flexible endoscopes (FEs) is often expensive, time consuming, and becomes increasingly complex, due to rising demands of hygiene. After beneficial results in reprocessing of rigid endoscopes using Impelux™ UV-C light technology, we tested the same method for reprocessing of FEs without working channel. Materials and methods Testing was performed on FEs without working channel after routine clinical use (transnasal flexible endoscopy). Disinfection consisted of mechanical precleaning and 60 s exposure to Impelux™ UV-C light technology. Bacterial contamination was tested on 50 FEs before and after disinfection. Further 50 FEs regarding protein residuals. The absolute effectiveness of the D60 was tested on 50 test bodies (RAMS) with a standardized contamination of 107 colony-forming units (CFU) of Enterococcus faecium. Results The FEs were contaminated with a high average value of 916.7 CFU (± 1057 CFU) after clinical usage. After reprocessing, an average contamination of 2.8 CFU (± 1.6) on 14% (n = 7) of the FEs was detected consisting of non-pathogenic species, the remaining FE were sterile. After reprocessing, all FEs were protein-free (< 1 μg). The artificially contaminated test bodies showed no remaining bacterial contamination after disinfection, resulting in an average absolute germ reduction of about 107 CFU. Conclusion Impelux™ UV-C light technology efficiently reduces bacterial contamination of FEs and might be useful in daily practice.

Postoperative haemorrhage following tonsillectomy occurs in 5.98% of all cases with up to 10 deaths reported annually in Germany. When comparing tonsillectomy (TE) and tonsillotomy (TT), the same long-term frequency of ENT infections is displayed in children and young adults. However, taking postoperative haemorrhaging into account, TT is more favourable. Chronic tonsillitis is one of the most common indications for TE in the adult population; however, a histopathological characterization may reveal objective criteria and provide a foundation for routinely performing TT in adults too. Three essential parameters hyperplasia (HP), grade of inflammation (GOI) and activity of inflammation (AOI), which are responsible for, and associated with a clinically relevant disease were histopathologically examined in the tonsils of 100 adult patients with chronic recurrent tonsillitis. The parameters were analysed and compared separately in the pharyngeal and basal parts of the tonsils as well as in three sections (upper and lower pole of the tonsil, middle part) as this may influence the indication for TT. The comparison of the basal and pharyngeal portions displayed a significant difference in the GOI and the HP in all three sections: grade 2 HP as well as GOI were more commonly found in the basal than pharyngeal portions (p> 0.001). AOI (grade 2) displayed the same properties in the middle section (p < 0.002), but did not reach statistical significance in the cranial and caudal sections (p = 0.107 and p = 0.186). An overabundance of grade 1 GOI, AOI, and HP was seen in the pharyngeal sections. The results show that two out of three relevant parameters that demonstrate histopathological changes in recurrent inflamed tonsils have a significantly stronger presence in the basal section of the tonsil as opposed to the pharyngeal section. The processes initiated by inflammation next to the surface responsible for a clinically relevant recurrent tonsillitis seem to cause stronger reactions in the deep follicular portion of the tonsils.

Although the history of intraoperative neuromonitoring (IONM) dates back to the 19th century, the method did not evolve further than the mere differentiation of nerves until recently. Only the development of continuous IONM (cIONM) has allowed for non-stop analysis of excitation amplitude and latency during surgical procedures, which is nowadays integrated into the software of almost all commercially available neuromonitoring devices. The objective of cIONM is real-time monitoring of nerve status in order to recognize and prevent impending nerve injury and predict postoperative nerve function. Despite some drawbacks such as false-positive/negative alarms, technical artefacts, and rare adverse effects, cIONM remains a good instrument which is still under development. Active (acIONM) and passive (pcIONM) methods of cIONM are described in literature. The main fields of cIONM implementation are currently thyroid surgery (in which the vagal nerve is continuously stimulated) and surgery to the cerebellopontine angle (in which the facial nerve is either continuously stimulated or the discharge signal of the nerve is analyzed via pcIONM). In the latter surgery, continuous monitoring of the cochlear nerve is also established.

No abstract

Kontinuierliches intraoperatives Neuromonitoring (cIONM) in der Kopf-Hals-Chirurgie-eine Übersicht Intraoperatives Neuromonitoring (IONM) zielt darauf ab, gefährdete neuronale Strukturen anatomisch und funktionell zu erhalten und so postoperativ temporäre und dauerhafte Paresen zu vermeiden. Modernes IONM ermöglicht nicht nur Nervenidentifizierung, sondern auch die Erkennung potenziell schädlicher Manipulationen; so kann anhand der intraoperativen Informationen eine Vorhersage der postoperativen Funktion erfolgen. Im Kopf-Hals-Bereich ist das IONM in der HNO-Heilkunde, Neurochirurgie und Schilddrüsenchirurgie etabliert. Hintergrund Die Geschichte des intraoperativen Neuromonitorings (IONM) reicht bis ins Jahr 1898 zurück, als Dr. Fedor Krause aus Berlin die monopolare faradische Stimulation bei der Neurektomie des N. vestibulocochlearis als Therapie eines dekompensierten Tinnitus zur Identifikation des N. facialis einsetzte [13]: Hierbei stimulierte er den Gesichtsnerv und stellte visuell fest, dass Kontraktionen der Ge-Die englische Version dieses Beitrags ist unter