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Advances in Experimental Medicine and... 2024The great arteries of the vertebrate carry blood from the heart to the systemic circulation and are derived from the pharyngeal arch arteries. In higher vertebrates, the... (Review)
Review
The great arteries of the vertebrate carry blood from the heart to the systemic circulation and are derived from the pharyngeal arch arteries. In higher vertebrates, the pharyngeal arch arteries are a symmetrical series of blood vessels that rapidly remodel during development to become the asymmetric aortic arch arteries carrying oxygenated blood from the left ventricle via the outflow tract. At the base of the aorta, as well as the pulmonary trunk, are the semilunar valves. These valves each have three leaflets and prevent the backflow of blood into the heart. During development, the process of aortic arch and valve formation may go wrong, resulting in cardiovascular defects, and these may, at least in part, be caused by genetic mutations. In this chapter, we will review models harboring genetic mutations that result in cardiovascular defects affecting the great arteries and the semilunar valves.
Topics: Animals; Aorta, Thoracic; Humans; Mutation; Disease Models, Animal; Aortic Valve; Heart Defects, Congenital
PubMed: 38884748
DOI: 10.1007/978-3-031-44087-8_46 -
Indian Journal of Otolaryngology and... Jun 2024Comparative evaluation of arterial blood gas in patients with stridor, before and after emergency tracheostomy. The present prospective study was conducted in tertiary...
Comparative evaluation of arterial blood gas in patients with stridor, before and after emergency tracheostomy. The present prospective study was conducted in tertiary care Centre from February 2022 to June 2023 on 42 patients who presented with stridor and underwent emergency tracheostomy in our department. After proper history taking and clinical examination, nonsurgical cause of stridor was ruled out. Patients were then classified on the basis of location of cause of stridor (whether oropharyngeal, hypo-pharyngeal, supra-glottic, glottic or sub-glottic). Immediately an arterial blood gas (ABG) analysis was done, and emergency tracheostomy was performed. Following tracheostomy, ABG analysis was done immediately, after 12 h and after 24 h. The mean age of presentation of stridor in our study was 65.02 ± 3.23 years, with male preponderance (Male: female ratio being 3.66:1). Most common etiology of stridor in our study was glottic carcinoma comprising 50%, and least common etiology of stridor was hypopharyngeal carcinoma, and subglottic stenosis comprising 2.4% each. There was statistically significant normalization of ABG in terms of pH, PO2, PCO2, HCO3. Mean pH, PO2, PCO2, and HCO3 before tracheostomy were 7.31, 74.8, 60.6, and 29.8 respectively. Mean pH, PO2, PCO2, HCO3, immediately after tracheostomy were7.38, 91.3, 48.4, and 27.4 respectively. After 12 h of tracheostomy, mean pH, PO2, PCO2, HCO3 were 7.41, 95.4, 42.7, 25.3 respectively. Mean pH, PO2, PCO2, HCO3 24 h after emergency tracheostomy were 7.441, 95.5, 42.8, 24.6 respectively. Emergency tracheostomy in stridor patients improves the acid base and ventilatory status, by relieving the obstruction as evidenced by statistically significant improvement in arterial blood gas values, and can be used as a diagnostic tool in upper airway obstruction.
PubMed: 38883467
DOI: 10.1007/s12070-023-04456-z -
Acta Neurochirurgica Jun 2024Velopharyngeal insufficiency (VPI) is a known complication of transoral surgery, with a reported incidence of 8.1%. The main factor related to VPI is the split of the...
BACKGROUND
Velopharyngeal insufficiency (VPI) is a known complication of transoral surgery, with a reported incidence of 8.1%. The main factor related to VPI is the split of the soft palate. However, dead space resulting from transoral decompression may play a pivotal role in the pathogenesis of the dysfunction. In our experience, functionally significant dead space is almost constantly present after transoral decompression. This is probably due to malformation in children and postoperative scarring, thus configuring a nosological entity that we could define as "syndrome of the nasopharyngeal dead space." Palatal prosthesis and pharyngoplasty have been proposed, though these surgical procedures are technically tricky and with possible complications, such as OSA symptoms, snoring, and nasopharyngeal stenosis.
METHODS
We proposed an effortless and minimally invasive procedure to treat this condition based on lipofilling the nasopharynx posterior wall endoscopically. To test the procedure's functional result, the submucosa of the nasopharynx posterior wall was initially filled with resorbable material, namely fibrin glue and autologous blood. The result was optimal but regressed after one month. Then, we repeated the procedure by lipofilling with autologous abdominal fat, resulting in a more stable anatomical and functional outcome at six months follow-up.
RESULTS
The patient had a prompt significant improvement of his complaints (rhinolalia and oronasal regurgitation) and a correct projection of the nasopharynx posterior wall, with correct closure during phonation and absence of oronasal reflux.
CONCLUSIONS
The "syndrome of the nasopharyngeal dead space" should be correctly identified after transoral surgery. It can be effectively treated with lipofilling of the posterior nasopharyngeal wall, a simple and minimally invasive procedure.
Topics: Humans; Male; Adipose Tissue; Endoscopy; Nasopharynx; Palate, Soft; Postoperative Complications; Treatment Outcome; Velopharyngeal Insufficiency; Child
PubMed: 38880842
DOI: 10.1007/s00701-024-06160-5 -
Oropharyngeal stenosis in patient with oral submucous fibrosis: a case report with 8-year follow-up.BMC Oral Health Jun 2024Oral submucous fibrosis (OSF) is a chronic, progressive condition affecting the oral mucosa associated with areca nut consumption. It leads to restricted tongue...
Oral submucous fibrosis (OSF) is a chronic, progressive condition affecting the oral mucosa associated with areca nut consumption. It leads to restricted tongue movement, loss of papillae, blanching and stiffening of the mucosa, difficulty in opening the mouth, and challenges in eating due to inflammation and fibrosis. This report presents a rare case of oropharyngeal stenosis secondary to OSF in a 43-year-old male with a history of chewing betel nut. A surgical procedure similar to Uvulopalatopharyngoplasty was performed to excise the submucous oropharyngeal stenosis and to reconstruct the uvula, palatoglossal arch, and palatopharyngeal arch. At 8 years postoperatively, the patient exhibited a normal mouth opening and oropharyngeal aperture.
Topics: Humans; Male; Oral Submucous Fibrosis; Adult; Areca; Constriction, Pathologic; Follow-Up Studies; Oropharynx; Uvula
PubMed: 38872152
DOI: 10.1186/s12903-024-04467-4 -
Vestnik Otorinolaringologii 2024The article presents a case of pharyngeal dysphagia and obstructive sleep apnea syndrome caused by degenerative-dystrophic changes in the cervical spine with the...
The article presents a case of pharyngeal dysphagia and obstructive sleep apnea syndrome caused by degenerative-dystrophic changes in the cervical spine with the formation of large cervical osteophytes at the C3-C6 level. Osteophytes caused deformation of the posterior wall of the hypopharynx and narrowing of its lumen by 20-25% from the level of the arytenoid cartilages to the upper parts of the epiglottis. CT scan also showed the intervertebral disc heights lost, as well as osteophytes at the posterolateral margins of the vertebral bodies (disc osteophyte complex). Osteosclerosis in combination with facet arthrosis caused spinal and foraminal stenosis.
Topics: Humans; Cervical Vertebrae; Deglutition Disorders; Sleep Apnea, Obstructive; Tomography, X-Ray Computed; Treatment Outcome
PubMed: 38805473
DOI: 10.17116/otorino202489021109 -
Surgical Endoscopy May 2024Recent studies have reported the therapeutic use of endoscopic submucosal dissection (ESD) using an ultrathin endoscope for targeting pharyngeal and distal side lesions...
BACKGROUND
Recent studies have reported the therapeutic use of endoscopic submucosal dissection (ESD) using an ultrathin endoscope for targeting pharyngeal and distal side lesions in the stenosis or as a less invasive treatment via the nasal route. However, the effectiveness and safety of these treatments remain undetermined. Therefore, this study aimed to review treatment outcomes and discuss the advantages and precautions of the treatments based on our experience.
METHODS
This study included 13 patients with 14 lesions who underwent 14 sessions of upper gastrointestinal ESD using an ultrathin endoscope between December 2021 and August 2023. The outcome measures included lesion background, en bloc resection rate, en bloc complete resection rates, and incidence of adverse events (including post-operative bleeding, intraoperative perforation, and delayed perforation).
RESULTS
The lesions in the esophagus, stomach, and duodenum were eight, three, and three, respectively, and the median length (range) of each located lesion was 16.5 (6-26), 17 (9-36), and 10 (4-16) mm, respectively. En bloc resection and en bloc complete resection rates were 100 and 92.9%, respectively. The only adverse event was an intraoperative perforation observed during duodenal ESD, resulting from the assistant's inadvertent expansion of the SOUTEN at the final dissection stage.
CONCLUSION
Our results demonstrate that ESD with an ultrathin endoscope effectively reaches lesions in difficult locations and enables treatment within a small working space. Therefore, ESD using an ultrathin endoscope is a treatment option for lesions located distally to gastrointestinal stenosis, highly fibrotic lesions, and duodenal tumors.
PubMed: 38769184
DOI: 10.1007/s00464-024-10882-z -
Journal of Biomechanics May 2024Snoring is common in children and is associated with many adverse consequences. One must study the relationships between pharyngeal morphology and snoring physics to...
Snoring is common in children and is associated with many adverse consequences. One must study the relationships between pharyngeal morphology and snoring physics to understand snoring progression. Although some model studies have provided fluid-structure interaction dynamic descriptions for the correlation between airway size and snoring physics, the descriptions still need to be further investigated in patient-specific airway models. Fluid-structure interaction studies using patient-specific airway structures complement the above model studies. Based on reported cephalometric measurement methods, this study quantified and preset the size of the palatopharynx airway in a patient-specific airway and investigated how the palatopharynx size affects the pharyngeal airflow fluctuation, soft palate vibration, and glossopharynx vibration with the help of a verified FSI method. The results showed that the stenosis anterior airway of the soft palate increased airway resistance and airway resistance fluctuations, which can lead to increased sleep effort and frequent snoring. Widening of the anterior airway can reduce airflow resistance and avoid obstructing the anterior airway by the soft palate vibration. The pharyngeal airflow resistance, mouth inflow proportion, and soft palate apex displacement have components at the same frequencies in all airway models, and the glossopharynx vibration and instantaneous inflow rate have components at the same frequencies, too. The mechanism of this same frequency fluctuation phenomenon can be explained by the fluid-structure interaction dynamics of an ideal coupled model consisting of a flexible plate model and a collapsible tube model. The results of this study demonstrate the potential of FSI in studying snoring physics and clarify to some degree the mechanism of airway morphology affecting airway vibration physics.
Topics: Humans; Pharynx; Vibration; Snoring; Child; Palate, Soft; Male; Airway Resistance; Models, Biological
PubMed: 38657433
DOI: 10.1016/j.jbiomech.2024.112111 -
Compendium of Continuing Education in... Apr 2024Hypoplastic maxilla is a common skeletal anomaly that compromises function and esthetics. Beyond just a narrow-appearing smile, this abnormality presents significant...
Hypoplastic maxilla is a common skeletal anomaly that compromises function and esthetics. Beyond just a narrow-appearing smile, this abnormality presents significant restorative challenges in adult patients as it is often associated with crowding, compromised axial inclination of the teeth, lack of alveolar bone support, root proximity, and occlusal trauma.1 Recent research also confirms association of maxillary deficiency with nasal stenosis and a predisposition to compromised nasal airflow and pharyngeal collapse during sleep.2,3 Maxillary transverse skeletal deficiency is often but not always associated with posterior dental cross-bite. In most cases, maxillary posterior teeth are flared buccally and mandibular posterior teeth are excessively lingually inclined masking the underlying skeletal problem.4 Advances in 3D imaging in dentistry, namely ultra-low radiation cone-beam imaging technology, have significantly enhanced clinicians' ability to diagnose and subsequently treat a maxillary transverse deficiency.5.
Topics: Adult; Humans; Esthetics, Dental; Orthodontics; Malocclusion; Tooth; Maxilla; Orthodontic Appliances, Removable; Palatal Expansion Technique; Cone-Beam Computed Tomography
PubMed: 38622082
DOI: No ID Found -
Nederlands Tijdschrift Voor Geneeskunde Mar 2024This clinical lesson describes three patients with problems after a total laryngectomy. Patient A suffered from acute tracheitis and narrowing of the tracheostoma....
This clinical lesson describes three patients with problems after a total laryngectomy. Patient A suffered from acute tracheitis and narrowing of the tracheostoma. Patient B experienced acute dyspnea due to thick mucus plugs. Patient C had progressive symptoms of deteriorating speech and dysphagia, which resolved after dilatation of a pharyngeal stenosis. A total laryngectomy leads to definitive changes in anatomy and physiology. In case of respiratory symptoms, it is important to recognize the tracheostoma is the only entrance to the airway. Speech is generally well rehabilitated with a speech valve in a tracheoesophageal fistula.
Topics: Humans; Laryngectomy; Deglutition Disorders; Dyspnea
PubMed: 38512235
DOI: No ID Found -
Journal of Vascular Surgery Mar 2024
PubMed: 38485072
DOI: 10.1016/j.jvs.2024.03.018