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Increase of cardiodepressant activity in medium incubating the posterior pituitary lobe in situ during vagal nerve stimulation in rat

100%

Goraca A. , Traczyk W. Z.

Journal of Physiology and Pharmacology

1991

tom 42

nr 3

Previous studies have indicated that there is a cardiodepressant factor in the medium incubating the posterior pituitary lobe in situ. The cardiodepressant activity of the medium incubating the posterior pituitary lobe before and during stimulation of the vagus nerves was tested on isolated auricles of the right heart atrium of a two-day-old rat. It was found that the medium incubating the posterior pituitary lobe collected before stimulation decreased the contraction rate of the auricle by 34%, while that collected during the intermittent stimulation of the central ends of the cut vagus nerves caused a decrease of the auricle contractions frequency by 52%. The addition of cholinergic, serotoninergic, histaminergic receptor blockers or prostaglandin synthetase into Ringer-Lock’s solution bathing the auricle has no effect on the changes of the contraction rate caused by the incubation medium.

The testing of an artificial modified bacterial cellulose auricle skeleton in an animal model

100%

Miśkiewicz S. , Grobelski B. , Pasieka Z. , Miśkiewicz M.

Polish Journal of Surgery

2019

tom 91(2)

7-11

The aim of this study was to assess whether modified bacterial cellulose can be used for an artificial auricle skeleton. Introduction: The auricle is a part of the external ear. It consists of skin, cartilage, muscles and adipose tissue. The cartilage gives shape to the structure. There are several indications for reconstruction, such as congenital anomalies, mechanical injuries, and burns, and a range of methods have been proposed for the complete reconstruction of the auricle. Material and methods: A bacterial cellulose membrane, at least 25 mm in thickness, was produced in vitro by Acetobacter xylinum culture. The entire artificial human auricle skeleton was made to scale to allow its implantation into an animal model - Wistar rats. Forty rats were divided into four groups of 10 animals. Each group was assigned a different resection time: 14 days, 30 days, 90 days or 720 days. After each resection, an examination of the artificial skeleton and the tissues surrounding it was conducted. The surgical procedure was based on the Nagata technique. Results: Resection after 14, 30, 90 and 720 days shows the progression of the healing process and integration of the artificial skeleton into the animal body. There are no signs of change in the shape or structure of the skeleton. Discussion: Several surgical techniques and biotechnological methods have been developed over the past few years to improve the results of facial reconstruction. Other approaches can be used to create auricle cartilage, based on scaffolds and chondrocytes. Conclusion: My findings indicate that modified bacterial cellulose can be used to form an effective artificial auricle which appears to maintain its shape and elasticity, with no signs of degradation.

Histological structure of the auricle of swine fetuses from different periods of gestation

100%

Bruzewicz S. , Biezynska K.

Folia Morphologica

1998

tom 57

nr 1

Rozległa rana cięta twarzy – opis przypadku

84%

Woźniczko K. , Molga-Magusiak M. , Rzepakowska A. , Bartoszewicz R.

Polski Przegląd Otorynolaryngologiczny

2021

tom 10(3)

nr 3

1-5

57-letnia pacjentka została przywieziona przez Zespół Ratownictwa Medycznego na Izbę Przyjęć z 25-centymetrową raną ciętą twarzy po stronie lewej. Uraz został zadany nożem. Uszkodzeniu uległ miąższ śliniaki, przewód wyprowadzający Stenona, język, lewy kącik ust, mięsień żwacz, część chrzęstna przewodu słuchowego zewnętrznego oraz małżowina uszna. Nerw twarzowy nie został uszkodzony. W artykule opisano sposób chirurgicznego zaopatrzenia uszkodzonych struktur twarzy. Na podstawie przeglądu literatury omówione zostały postępowanie oraz istotne aspekty zaopatrzenia tego typu urazów. Rany cięte okolicy twarzy i ucha wymagają dokładnej oceny i odpowiedniego zaopatrzenia, by uzyskać prawidłowe gojenie i uniknąć powikłań. Słowa kluczowe: ślinianka przyuszna, przewód wyprowadzający ślinianki, małżowina uszna, rana cięta twarzy

We present a case report of a 57-year-old female with a 25 cm laceration on the left side of her face. The patient was cut with a knife and as a result the parotid gland, the parotid duct, the tongue, the corner of the mouth, the masseter muscle, the cartilaginous part of the external acoustic canal and the auricle were damaged. The facial nerve was not damaged. All of the injuries were managed, including end-to-end anastomosis of the Stenon duct and layered closure of the auricle. The cut wounds of the facial and ear area must be carefully assessed and adequately treated in order to assure proper healing and avoid complications. Key words: parotid gland, parotid duct, auricle, facial cut wound