Salvage of Unilateral Complete Ear Amputation with Continuous Local Hyperbaric Oxygen, Platelet-Rich Plasma and Polydeoxyribonucleotide without Micro-Revascularization

Autologous Platelet and Extracellular Vesicle-Rich Plasma as Therapeutic Fluid: A Review

The preparation of autologous platelet and extracellular vesicle-rich plasma (PVRP) has been explored in many medical fields with the aim to benefit from its healing potential. In parallel, efforts are being invested to understand the function and dynamics of PVRP that is complex in its composition and interactions. Some clinical evidence reveals beneficial effects of PVRP, while some report that there were no effects. To optimize the preparation methods, functions and mechanisms of PVRP, its constituents should be better understood. With the intention to promote further studies of autologous therapeutic PVRP, we performed a review on some topics regarding PVRP composition, harvesting, assessment and preservation, and also on clinical experience following PVRP application in humans and animals. Besides the acknowledged actions of platelets, leukocytes and different molecules, we focus on extracellular vesicles that were found abundant in PVRP.

Auricular avulsion injuries: Literature review and management algorithm

Traumatic ear avulsion (TEA) may have tremendous psychological consequences if not managed properly. There are no clear guidelines on the surgical management of these injuries, especially in developing countries where microsurgical facilities are lacking. We aimed to review the literature on surgical management of TEA with the main focus on direct re-attachment (DR) so as to develop a surgical management algorithm that can be applied in the absence of microsurgical facilities. We performed an extensive review of the relevant English literature on papers indexed in PubMed describing TEA repaired with DR without restriction to a specific publication time window. A total of 28 cases in 18 publications were reviewed and analyzed. Our results indicate that in the acute setting with no available microvascular expertise, DR of auricular avulsion injuries can be better than other nonmicrosurgical techniques in generating good esthetic results, especially in incomplete auricular avulsion and small segment avulsion. The operative approach depends on the clinical setting. DR of the auricular avulsion injuries is an accepted approach. It produces good cosmetic outcomes while preserving the auricular area for future reconstruction in case of re-attachment failure.

Prospects of Extracellular Vesicles in Otorhinolaryngology, Head and Neck Surgery

The diagnostic and therapeutic potential of extracellular vesicles (EVs) has been recognised in many fields of medicine for several years. More recently, it has become a topic of increasing interest in otorhinolaryngology, head and neck surgery (ORL-HNS). With this narrative review, we have aspired to determine different aspects of those nanometrically sized theranostic particles, which seem to have promising potential as biomarkers in some of the most common diseases of the ORL-HNS by being available via less invasive diagnostic methods. At the same time, a better understanding of their activity provides us with new possibilities for developing specific target treatments. So far, most research has been oriented towards the role of EVs in the progression of head and neck cancer, notably head and neck squamous cell cancer. Nonetheless, some of this research has focused on chronic diseases of the ears, nose and paranasal sinuses. However, most research is still in the preclinical or experimental phase. It therefore requires a further and more profound understanding of EV content and behaviour to utilise their nanotheranostic capacities to their fullest potential.

Applications of Marine Organism-Derived Polydeoxyribonucleotide: Its Potential in Biomedical Engineering

Polydeoxyribonucleotides (PDRNs) are a family of DNA-derived drugs with a molecular weight ranging from 50 to 1500 kDa, which are mainly extracted from the sperm cells of salmon trout or chum salmon. Many pre-clinical and clinical studies have demonstrated the wound healing and anti-inflammatory properties of PDRN, which are mediated by the activation of adenosine A2A receptor and salvage pathways, in addition to promoting osteoblast activity, collagen synthesis, and angiogenesis. In fact, PDRN is already marketed due to its therapeutic properties against various wound healing- and inflammation-related diseases. Therefore, this review assessed the most recent trends in marine organism-derived PDRN using the Google Scholar search engine. Further, we summarized the current applications and pharmacological properties of PDRN to serve as a reference for the development of novel PDRN-based technologies.

The effects of polydeoxyribonucleotide on wound healing and tissue regeneration: a systematic review of the literature

Aim: The present study evaluated the effects of polydeoxyribonucleotide (PDRN) on tissue regeneration, paying special attention to the molecular mechanisms that underlie its tissue remodeling actions to better identify its effective therapeutic potential in wound healing. Materials & methods: Strategic searches were conducted through MEDLINE/PubMed, Google Scholar, Scopus, Web of Science and the Cochrane Central Register of Controlled Trials, from their earliest available dates to March 2020. The studies were included with the following eligibility criteria: studies evaluating tissue regeneration, and being an in vitro, in vivo and clinical study. Results: Out of more than 90 articles, 34 fulfilled the eligibility criteria. All data obtained proved the ability of PDRN in promoting a physiological tissue repair through salvage pathway and adenosine A2A receptor activation. Conclusion: Up to date PDRN has proved promising results in term of wound regeneration, healing time and absence of side effects.

Traumatic complete outer ear amputation by human bite, a forensic case report and review of the literature

We present a case of a complete external ear amputation, caused by a human bite, that took place during a quarrel in a local farmers' market. The male victim was transferred to the Hospital. After surgical reattachment of the auricle, a forensic clinical examination was performed, as per legal obligation. During examination, the victim was found to have sustained: contusions of the orbital regions (lower eyelids), bilaterally, soft tissue oedema of the forehead (to the left of the middle line), and contusion of the right neck area. He also sustained multiple soft tissue injuries (contusions, abrasions) on the torso and on both upper and lower extremities. Clinical forensic examination of human bite injuries requires thorough description of the wound, proper photography and possibly collection of swabs for DNA identification (in case of unknown perpetrator). Nevertheless, the Forensic Pathologist is often required to perform clinical examination, only after medical care has been provided. Therefore, clinicians should be aware of the need of proper documentation and act accordingly.

Immediate Reconstruction of Amputated Ear With Fascia Flap

BACKGROUND

Various surgical methods have been used for reconstruction of an amputated ear, including microsurgical replantation and delayed reconstruction using synthetic material or autologous rib cartilage. The authors share our experience of immediate reconstruction using amputated cartilage and discuss the advantages compared to other techniques of reconstruction.

MATERIALS AND METHODS

The authors retrospectively reviewed the medical records of 3 patients who underwent immediate reconstruction of amputated ear by a single operator. In the cases, the amputees were washed; the skin and cartilage were separated. The ear cartilage was fixed to its original position with non-absorbable suture. Regional fascia flap was elevated and covered the ear cartilage. The amputee skin was redraped to cover the fascia flap. Several months after the operation, photographic assessment was done.

RESULTS

All 3 cases showed well-defined convolution, tolerable skin color, and patient satisfaction without any major complications. A patient showed mild temporal incision site alopecia.

CONCLUSION

The above immediate reconstruction method can achieve reliable and favorable result with minimal complications.