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Azuma C, Oishi T, Tohno Y, Ke L, Zhao XZ, Minami T, Horii-Hayashi N, Inoue K. Element accumulation in the tracheal and bronchial cartilages of monkeys. Biochem Biophys Res Commun 2024; 733:150699. [PMID: 39288699 DOI: 10.1016/j.bbrc.2024.150699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2024] [Accepted: 09/12/2024] [Indexed: 09/19/2024]
Abstract
Compositional changes in the tracheal and bronchial cartilages can affect respiratory ventilation and lung function. We aimed to elucidate element accumulation in the tracheal and bronchial cartilages of monkeys and divided it into four sites: the tracheal, tracheal bifurcation, left bronchial, and right bronchial cartilages. The elemental content was analyzed using inductively coupled plasma atomic emission spectrometry. The average calcium content was two to three times higher in the tracheal cartilage than in the other three cartilages. The trends of phosphorus and zinc were similar to those of calcium. The average calcium, phosphorus, and zinc cartilage contents were the highest in the tracheal cartilage and decreased in the following order: the left bronchial, right bronchial, and tracheal bifurcation cartilages. These findings revealed that differences existed in element accumulation between different sites within the same airway cartilage and that calcium, phosphorus, and zinc accumulation mainly occurred in the tracheal cartilage. A substantial direct correlation was observed between age and calcium content in the tracheal and bronchial cartilages and all such monkeys with high calcium content were > four years of age. These results suggest that calcium accumulation occurs in the tracheal and bronchial cartilages after reaching a certain age. An extremely substantial direct correlation was observed between calcium and phosphorus contents in the tracheal and bronchial cartilages. This finding is similar to the previously published calcium and phosphorus correlations in several other cartilages, suggesting that the calcium and phosphorus contents of cartilage exist in a certain ratio.
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Affiliation(s)
- Cho Azuma
- Department of Anatomy and Cell Biology, Nara Medical University, Kashihara, Nara 634-8521, Japan.
| | - Takao Oishi
- Systems Neuroscience Section, Center for the Evolutionary Origins of Human Behaviors, Kyoto University, Inuyama, Aichi 484-8506, Japan
| | - Yoshiyuki Tohno
- Department of Anatomy and Cell Biology, Nara Medical University, Kashihara, Nara 634-8521, Japan
| | - Lining Ke
- Department of Human Anatomy and Histo-Embryology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China
| | - Xiao-Zhen Zhao
- Department of Human Anatomy and Histo-Embryology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China
| | - Takeshi Minami
- Laboratory of Environmental Biology, Department of Life Science, Faculty of Science and Technology, Kinki University, Higashi-Osaka, Osaka 577-8502, Japan
| | - Noriko Horii-Hayashi
- Department of Anatomy and Cell Biology, Nara Medical University, Kashihara, Nara 634-8521, Japan
| | - Koichi Inoue
- Department of Anatomy and Cell Biology, Nara Medical University, Kashihara, Nara 634-8521, Japan.
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Experimental Study on the Biological Outcome of Auricular Cartilage and Costal Cartilage at Different Time Periods After Autologous Cartilage Rhinoplasty. J Craniofac Surg 2023; 34:785-789. [PMID: 36168117 DOI: 10.1097/scs.0000000000009043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 09/04/2022] [Indexed: 11/26/2022] Open
Abstract
Since autologous cartilage is a good transplant material, it is widely used in various fields of clinical medicine. In this study, we collected clinical specimens obtained at different numbers of years after transplantation and used histologic staining to explore the post-transplantation changes in auricular cartilage and costal cartilage. A retrospective analysis was performed on patients who underwent primary autologous cartilage rhinoplasty and secondary rhinoplasty from 2017 to 2021, and the remaining autologous cartilage tissue after surgery was used for histologic testing. As time progressed after transplantation, the density of costal chondrocytes decreased first and then increased, while the secretion of type II collagen and extracellular matrix both decreased slightly. There was a clear boundary between the cartilage tissue and the surrounding connective tissue, and there was no ingrowth of blood vessels in the cartilage. Auricular cartilage showed a decrease in the integrity of the matrix edge. Moreover, local fibrosis was visible, and vascular ingrowth was observed at the edge of the cartilage. The content of type II collagen first increased and then decreased, and the cell secretion function was lower than that of normal chondrocytes. The results of the study suggest that the histologic outcome of elastic cartilage after transplantation is significantly different from that of hyaline cartilage. Moreover, costal cartilage was more stable than auricular cartilage after transplantation.
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Asioli S, Ruengwanichayakun P, Zoli M, Guaraldi F, Sollini G, Greco P, Facco C, Gibertoni D, Jiménez BV, Benini S, Turri-Zanoni M, Pasquini E, Mazzatenta D, Foschini MP, Righi A. Association of Clinicopathological Features With Outcome in Chondrosarcomas of the Head and Neck. Otolaryngol Head Neck Surg 2020; 164:807-814. [PMID: 32928034 DOI: 10.1177/0194599820957271] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVE The aim of this study is to assess the association between clinical and radiological features as well as of isocitrate dehydrogenase 1 and 2 (IDH 1,2) mutations with outcome in head and neck chondrosarcomas. STUDY DESIGN Retrospective study. SETTING Tertiary referral center. METHODS Clinical, histological, and molecular data of patients with head and neck chondrosarcomas treated by surgery were collected. RESULTS Forty-six patients were included. The mean age at diagnosis was 56 years (range, 17-78). The tumor originated from the skull base (52.2%), facial bones (28.2%), or laryngotracheal area (19.6%). At last follow-up (median 52.5 months), 38 patients were alive, 30 of which were disease free, whereas 8 had died, 4 of disease progression and 4 of other causes. Fourteen (30.4%) had local recurrence and 2 (4.3%) had lung metastasis. All cases were negative for cytokeratin AE1/AE3, brachyury, and IDH1 at immunohistochemistry, while Sanger sequencing identified IDH1/2 point mutations, typically IDH1 R132C, in 9 (37.5%) tumors arising from the skull base. Margin infiltration on the surgical specimen negatively affected the outcome, whereas no correlation was identified with IDH mutation status. CONCLUSIONS An adequate margin positively affects survival. IDH mutation status does not affect patient outcome.
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Affiliation(s)
- Sofia Asioli
- Pituitary Unit, Center for the Diagnosis and Treatment of Hypothalamic-Pituitary Diseases, Istituto di Ricerca e Cura a Carattere Scientifico Istituto delle Scienze Neurologiche di Bologna, Bologna, Italia.,Dipartimento di Scienze Biomediche e Neuromotorie - DIBINEM, Università di Bologna, Bologna, Italia
| | - Poosit Ruengwanichayakun
- Service of Anatomic Pathology, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy.,Department of Pathology, Faculty of Medicine, Naresuan University, Phitsanulok, Thailand
| | - Matteo Zoli
- Pituitary Unit, Center for the Diagnosis and Treatment of Hypothalamic-Pituitary Diseases, Istituto di Ricerca e Cura a Carattere Scientifico Istituto delle Scienze Neurologiche di Bologna, Bologna, Italia.,Dipartimento di Scienze Biomediche e Neuromotorie - DIBINEM, Università di Bologna, Bologna, Italia
| | - Federica Guaraldi
- Dipartimento di Scienze Biomediche e Neuromotorie - DIBINEM, Università di Bologna, Bologna, Italia
| | | | - Paolo Greco
- UOC ORL Ospedale Bellaria Ausl Bologna, Bologna, Italy
| | - Carla Facco
- Anatomia Patologica, ASST Sette Laghi Varese, Italy
| | - Dino Gibertoni
- Unit of Hygiene, Public Health and Biostatistics, Department of Biomedical and Neuromotor Sciences, University of Bologna, Italy
| | - Brayan Vega Jiménez
- Service of Anatomic Pathology, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy.,Department of Pathology, San Juan de Dios Hospital, San José, Costa Rica
| | - Stefania Benini
- Service of Anatomic Pathology, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Mario Turri-Zanoni
- Unit of Otorhinolaryngology - Head & Neck Surgery, University of Insubria, Varese, Italy
| | - Ernesto Pasquini
- Pituitary Unit, Center for the Diagnosis and Treatment of Hypothalamic-Pituitary Diseases, Istituto di Ricerca e Cura a Carattere Scientifico Istituto delle Scienze Neurologiche di Bologna, Bologna, Italia.,UOC ORL Ospedale Bellaria Ausl Bologna, Bologna, Italy
| | - Diego Mazzatenta
- Pituitary Unit, Center for the Diagnosis and Treatment of Hypothalamic-Pituitary Diseases, Istituto di Ricerca e Cura a Carattere Scientifico Istituto delle Scienze Neurologiche di Bologna, Bologna, Italia.,Dipartimento di Scienze Biomediche e Neuromotorie - DIBINEM, Università di Bologna, Bologna, Italia
| | - Maria Pia Foschini
- Dipartimento di Scienze Biomediche e Neuromotorie - DIBINEM, Università di Bologna, Bologna, Italia
| | - Alberto Righi
- Service of Anatomic Pathology, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
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Tallegas M, Miquelestorena-Standley É, Labit-Bouvier C, Badoual C, Francois A, Gomez-Brouchet A, Aubert S, Collin C, Tallet A, de Pinieux G. IDH mutation status in a series of 88 head and neck chondrosarcomas: different profile between tumors of the skull base and tumors involving the facial skeleton and the laryngotracheal tract. Hum Pathol 2019; 84:183-191. [DOI: 10.1016/j.humpath.2018.09.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 09/24/2018] [Accepted: 09/29/2018] [Indexed: 02/08/2023]
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Dikina AD, Alt DS, Herberg S, McMillan A, Strobel HA, Zheng Z, Cao M, Lai BP, Jeon O, Petsinger VI, Cotton CU, Rolle MW, Alsberg E. A Modular Strategy to Engineer Complex Tissues and Organs. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2018; 5:1700402. [PMID: 29876200 PMCID: PMC5978945 DOI: 10.1002/advs.201700402] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Revised: 08/28/2017] [Indexed: 05/25/2023]
Abstract
Currently, there are no synthetic or biologic materials suitable for long-term treatment of large tracheal defects. A successful tracheal replacement must (1) have radial rigidity to prevent airway collapse during respiration, (2) contain an immunoprotective respiratory epithelium, and (3) integrate with the host vasculature to support epithelium viability. Herein, biopolymer microspheres are used to deliver chondrogenic growth factors to human mesenchymal stem cells (hMSCs) seeded in a custom mold that self-assemble into cartilage rings, which can be fused into tubes. These rings and tubes can be fabricated with tunable wall thicknesses and lumen diameters with promising mechanical properties for airway collapse prevention. Epithelialized cartilage is developed by establishing a spatially defined composite tissue composed of human epithelial cells on the surface of an hMSC-derived cartilage sheet. Prevascular rings comprised of human umbilical vein endothelial cells and hMSCs are fused with cartilage rings to form prevascular-cartilage composite tubes, which are then coated with human epithelial cells, forming a tri-tissue construct. When prevascular- cartilage tubes are implanted subcutaneously in mice, the prevascular structures anastomose with host vasculature, demonstrated by their ability to be perfused. This microparticle-cell self-assembly strategy is promising for engineering complex tissues such as a multi-tissue composite trachea.
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Affiliation(s)
- Anna D. Dikina
- Department of Biomedical EngineeringCase Western Reserve University10900 Euclid AveClevelandOH44106USA
| | - Daniel S. Alt
- Department of Biomedical EngineeringCase Western Reserve University10900 Euclid AveClevelandOH44106USA
| | - Samuel Herberg
- Department of Biomedical EngineeringCase Western Reserve University10900 Euclid AveClevelandOH44106USA
| | - Alexandra McMillan
- Department of PathologyCase Western Reserve University10900 Euclid AveClevelandOH44106USA
| | - Hannah A. Strobel
- Department of Biomedical EngineeringWorcester Polytechnic Institute100 Institute RoadWorcesterMA01609USA
| | - Zijie Zheng
- Department of Biomedical EngineeringCase Western Reserve University10900 Euclid AveClevelandOH44106USA
| | - Meng Cao
- Department of Biomedical EngineeringCase Western Reserve University10900 Euclid AveClevelandOH44106USA
| | - Bradley P. Lai
- Department of Biomedical EngineeringCase Western Reserve University10900 Euclid AveClevelandOH44106USA
| | - Oju Jeon
- Department of Biomedical EngineeringCase Western Reserve University10900 Euclid AveClevelandOH44106USA
| | - Victoria Ivy Petsinger
- Department of Biomedical EngineeringCase Western Reserve University10900 Euclid AveClevelandOH44106USA
| | - Calvin U. Cotton
- Department of PediatricsDepartment of Physiology and BiophysicsCase Western Reserve University10900 Euclid AveClevelandOH44106USA
| | - Marsha W. Rolle
- Department of Biomedical EngineeringWorcester Polytechnic Institute100 Institute RoadWorcesterMA01609USA
| | - Eben Alsberg
- Department of Biomedical EngineeringCase Western Reserve University10900 Euclid AveClevelandOH44106USA
- Department of Orthopaedic SurgeryNational Center for Regenerative MedicineCase Western Reserve University10900 Euclid AveClevelandOH44106USA
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Safshekan F, Tafazzoli-Shadpour M, Abdouss M, Shadmehr MB. Viscoelastic Properties of Human Tracheal Tissues. J Biomech Eng 2017; 139:2552974. [PMID: 27618230 DOI: 10.1115/1.4034651] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Indexed: 01/23/2023]
Abstract
The physiological performance of trachea is highly dependent on its mechanical behavior, and therefore, the mechanical properties of its components. Mechanical characterization of trachea is key to succeed in new treatments such as tissue engineering, which requires the utilization of scaffolds which are mechanically compatible with the native human trachea. In this study, after isolating human trachea samples from brain-dead cases and proper storage, we assessed the viscoelastic properties of tracheal cartilage, smooth muscle, and connective tissue based on stress relaxation tests (at 5% and 10% strains for cartilage and 20%, 30%, and 40% for smooth muscle and connective tissue). After investigation of viscoelastic linearity, constitutive models including Prony series for linear viscoelasticity and quasi-linear viscoelastic, modified superposition, and Schapery models for nonlinear viscoelasticity were fitted to the experimental data to find the best model for each tissue. We also investigated the effect of age on the viscoelastic behavior of tracheal tissues. Based on the results, all three tissues exhibited a (nonsignificant) decrease in relaxation rate with increasing the strain, indicating viscoelastic nonlinearity which was most evident for cartilage and with the least effect for connective tissue. The three-term Prony model was selected for describing the linear viscoelasticity. Among different models, the modified superposition model was best able to capture the relaxation behavior of the three tracheal components. We observed a general (but not significant) stiffening of tracheal cartilage and connective tissue with aging. No change in the stress relaxation percentage with aging was observed. The results of this study may be useful in the design and fabrication of tracheal tissue engineering scaffolds.
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Affiliation(s)
- Farzaneh Safshekan
- Faculty of Biomedical Engineering, Amirkabir University of Technology, 424 Hafez Avenue, Tehran 15875-4413, Iran e-mail:
| | - Mohammad Tafazzoli-Shadpour
- Faculty of Biomedical Engineering, Amirkabir University of Technology, 424 Hafez Avenue, Tehran 15875-4413, Iran e-mail:
| | - Majid Abdouss
- Chemistry Department, Amirkabir University of Technology, 424 Hafez Avenue, Tehran 15875-4413, Iran e-mail:
| | - Mohammad B Shadmehr
- Tracheal Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Darabad Avenue, Shahid Bahonar Roundabout, Tehran 19558-41452, Iran e-mail:
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Safshekan F, Tafazzoli-Shadpour M, Abdouss M, Shadmehr MB. Mechanical Characterization and Constitutive Modeling of Human Trachea: Age and Gender Dependency. MATERIALS 2016; 9:ma9060456. [PMID: 28773579 PMCID: PMC5456771 DOI: 10.3390/ma9060456] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 05/16/2016] [Accepted: 06/02/2016] [Indexed: 11/16/2022]
Abstract
Tracheal disorders can usually reduce the free lumen diameter or wall stiffness, and hence limit airflow. Trachea tissue engineering seems a promising treatment for such disorders. The required mechanical compatibility of the prepared scaffold with native trachea necessitates investigation of the mechanical behavior of the human trachea. This study aimed at mechanical characterization of human tracheas and comparing the results based on age and gender. After isolating 30 human tracheas, samples of tracheal cartilage, smooth muscle, and connective tissue were subjected to uniaxial tension to obtain force-displacement curves and calculate stress-stretch data. Among several models, the Yeoh and Mooney-Rivlin hyperelastic functions were best able to describe hyperelastic behavior of all three tracheal components. The mean value of the elastic modulus of human tracheal cartilage was calculated to be 16.92 ± 8.76 MPa. An overall tracheal stiffening with age was observed, with the most considerable difference in the case of cartilage. Consistently, we noticed some histological alterations in cartilage and connective tissue with aging, which may play a role in age-related tracheal stiffening. No considerable effect of gender on the mechanical behavior of tracheal components was observed. The results of this study can be applied in the design and fabrication of trachea tissue engineering scaffolds.
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Affiliation(s)
- Farzaneh Safshekan
- Faculty of Biomedical Engineering, Amirkabir University of Technology, 424 Hafez Ave, Tehran 1587-4413, Iran.
| | - Mohammad Tafazzoli-Shadpour
- Faculty of Biomedical Engineering, Amirkabir University of Technology, 424 Hafez Ave, Tehran 1587-4413, Iran.
| | - Majid Abdouss
- Chemistry Department, Amirkabir University of Technology, Tehran 1587-4413, Iran.
| | - Mohammad B Shadmehr
- Tracheal Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran 1956944413, Iran.
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Laureano PEDS, Oliveira KDS, de Aro AA, Gomes L, Pimentel ER, Esquisatto MAM. Structure and composition of arytenoid cartilage of the bullfrog (Lithobates catesbeianus) during maturation and aging. Micron 2015; 77:16-24. [PMID: 26093475 DOI: 10.1016/j.micron.2015.05.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2014] [Revised: 05/24/2015] [Accepted: 05/28/2015] [Indexed: 01/23/2023]
Abstract
The aging process induces progressive and irreversible changes in the structural and functional organization of animals. The objective of this study was to evaluate the effects of aging on the structure and composition of the extracellular matrix of the arytenoid cartilage found in the larynx of male bullfrogs (Lithobates catesbeianus) kept in captivity for commercial purposes. Animals at 7, 180 and 1080 days post-metamorphosis (n=10/age) were euthanized and the cartilage was removed and processed for structural and biochemical analysis. For the structural analyses, cartilage sections were stained with picrosirius, toluidine blue, Weigert's resorcin-fuchsin and Von Kossa stain. The sections were also submitted to immunohistochemistry for detection of collagen types I and II. Other samples were processed for the ultrastructural and cytochemical analysis of proteoglycans. Histological sections were used to chondrocyte count. The number of positive stainings for proteoglycans was quantified by ultrastructural analysis. For quantification and analysis of glycosaminoglycans were used the dimethyl methylene blue and agarose gel electrophoresis methods. The chloramine T method was used for hydroxyproline quantification. At 7 days, basophilia was observed in the pericellular and territorial matrix, which decreased in the latter over the period studied. Collagen fibers were arranged perpendicular to the major axis of the cartilaginous plate and were thicker in older animals. Few calcification areas were observed at the periphery of the cartilage specimens in 1080-day-old animals. Type II collagen was present throughout the stroma at the different ages. Elastic fibers were found in the stroma and perichondrium and increased with age in the two regions. Proteoglycan staining significantly increased from 7 to 180 days and reduced at 1080 days. The amount of total glycosaminoglycans was higher in 180-day-old animals compared to the other ages, with marked presence of chondroitin- and dermatan-sulfate especially in this age. The content of hydroxyproline, which infers the total collagen concentration, was higher in 1080-day-old animals compared to the other ages. The results demonstrated the elastic nature of the arytenoid cartilage of L. catesbeianus and the occurrence of age-related changes in the structural organization and composition of the extracellular matrix. These changes may contribute to alter the function of the larynx in the animal during aging.
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Affiliation(s)
- Priscila Eliane dos Santos Laureano
- Programa de Pós-graduação em Ciências Biomédicas, Centro Universitário Hermínio Ometto, Av. Dr. Maximiliano Baruto, 500 Jd. Universitário, 13607-339, Araras, SP, Brazil
| | - Kris Daiana Silva Oliveira
- Programa de Pós-graduação em Ciências Biomédicas, Centro Universitário Hermínio Ometto, Av. Dr. Maximiliano Baruto, 500 Jd. Universitário, 13607-339, Araras, SP, Brazil
| | - Andrea Aparecida de Aro
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas, Rua Charles Darwin, s/n, CxP 6109, 13083-863, Campinas, SP, Brazil
| | - Laurecir Gomes
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas, Rua Charles Darwin, s/n, CxP 6109, 13083-863, Campinas, SP, Brazil
| | - Edson Rosa Pimentel
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas, Rua Charles Darwin, s/n, CxP 6109, 13083-863, Campinas, SP, Brazil
| | - Marcelo Augusto Marretto Esquisatto
- Programa de Pós-graduação em Ciências Biomédicas, Centro Universitário Hermínio Ometto, Av. Dr. Maximiliano Baruto, 500 Jd. Universitário, 13607-339, Araras, SP, Brazil.
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Elő G, Zubek L, Hargitai Z, Iványi Z, Branovics J, Gál J. Prevention of tracheal cartilage injury with modified Griggs technique during percutaneous tracheostomy - Randomized controlled cadaver study. Interv Med Appl Sci 2012; 4:206-209. [PMID: 24265877 PMCID: PMC3831783 DOI: 10.1556/imas.4.2012.4.5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Accepted: 08/28/2012] [Indexed: 11/12/2023] Open
Abstract
INTRODUCTION Tracheal stenosis is the most common severe late complication of percutaneous tracheostomy causing significant decrease in quality of life. Applying modified Griggs technique reduced the number of late tracheal stenoses observed in our clinical study. The aim of this study was to investigate the mechanism of this relationship. MATERIALS AND METHODS Forty-six cadavers were randomized into two groups according to the mode of intervention during 2006-2008. Traditional versus modified Griggs technique was applied in the two groups consequently. Wider incision, surgical preparation, and bidirectional forceps dilation of tracheal wall were applied in modified technique. Injured cartilages were inspected by sight and touch consequently. Age, gender, level of intervention, and number of injured tracheal cartilages were registered. RESULTS Significantly less frequent tracheal cartilage injury was observed after modified (9%) than original (91%) Griggs technique (p < 0.001). A moderate association between cartilage injury and increasing age was observed, whereas the level of intervention (p = 0.445) and to gender (p = 0.35) was not related to injury. Risk of cartilage injury decreased significantly (OR: 0.0264, 95%, CI: 0.005-0.153) with modified Griggs technique as determined in adjusted logistic regression model. DISCUSSION Modified Griggs technique decreased the risk of tracheal cartilage injury significantly in our cadaver study. This observation may explain the decreased number of late tracheal stenosis after application of the modified Griggs method.
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Rejtarová O, Hejna P, Soukup T, Kuchař M. Age and sexually dimorphic changes in costal cartilages. A preliminary microscopic study. Forensic Sci Int 2009; 193:72-8. [DOI: 10.1016/j.forsciint.2009.09.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2009] [Revised: 09/09/2009] [Accepted: 09/16/2009] [Indexed: 01/08/2023]
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Rejtarová O, Hejna P, Rejtar P, Bukač J, Slížová D, Krs O. Sexual dimorphism of ossified costal cartilage. Radiograph scan study on Caucasian men and women (Czech population). Forensic Sci Int 2009; 191:110.e1-5. [DOI: 10.1016/j.forsciint.2009.06.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2008] [Revised: 04/15/2009] [Accepted: 06/12/2009] [Indexed: 12/01/2022]
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Gerritsen M, Oxford JT, Frary M, Henderson J, Hampikian JM. Immuno-SEM characterization of developing bovine cartilage. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2008. [DOI: 10.1016/j.msec.2007.04.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abstract
OBJECTIVES To describe the uncommon causes of cough. DESIGN/METHODOLOGY An English language literature search by MEDLINE citations from 1975 through 2004 was used to identify publications on uncommon pulmonary and nonpulmonary disorders in which cough was present as the major or presenting symptom in >50% of those persons affected by the uncommon diseases. RESULTS A substantial number of uncommon or rare pulmonary and nonpulmonary disorders were identified. The uncommon occurrence of these diseases made it difficult to develop a meaningful evidence-based guideline to the diagnosis and therapy of many of the uncommon causes of cough. As cough was the major or presenting symptom, it was usually initially attributed to common respiratory diseases (eg, asthma or bronchitis). As a result, a substantial time lag existed from the onset of cough to the diagnosis of the etiologic entity. Diagnostic tests limited to the respiratory system did not always provide clues to the diagnosis of uncommon causes of cough. CONCLUSIONS Cough is the major or presenting symptom in many uncommon pulmonary and nonpulmonary disorders. A strong index of suspicion is essential to consider and diagnose the uncommon causes of cough. The diagnosis and management of cough in patients with uncommon causes of cough is dependent on the underlying etiology.
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Kano M, Shimizu Y, Okayama K, Igari T, Kikuchi M. A Morphometric Study of Age-Related Changes in Adult Human Epiglottis Using Quantitative Digital Analysis of Cartilage Calcification. Cells Tissues Organs 2005; 180:126-37. [PMID: 16113541 DOI: 10.1159/000086753] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/04/2005] [Indexed: 11/19/2022] Open
Abstract
The epiglottis plays an important role in deglutition in humans. The present study investigated age-related changes in the epiglottis using macroscopic and microscopic measurements. Epiglottic specimens from 281 Japanese adult cadavers (177 males, 104 females) were obtained. Specimens were divided into three groups according to age: group I: 20-39 years old (32 males, 26 females), group II: 50-69 years old (82 males, 36 females), and group III: 80-98 years old (63 males, 42 females). Width, height, and thickness were measured macroscopically. To evaluate the degree of calcium deposition, the calcium volume in digitalized von Kossa-stained sections was assessed using a quantitative analysis. An elemental analysis of the area detected with von Kossa staining was done using energy-dispersive X-ray fluorescence spectrometer (EDX). Measurements of the thickness and cell density in the superficial and deep layers of epiglottic cartilage were performed in horizontal histological sections. No significant differences in macroscopic width or height were found across the age groups in either sex. A series of three measurements in males was significantly larger than in females (p<0.05). The volume of the calcium deposit area was greater in males than in females (p<0.05) and was significantly increased in group III in males (p<0.05). The lower level of the epiglottic cartilage showed a greater calcium deposit area than the upper level. In the scanning image by line and surface analysis using EDX, the calcium deposit areas detected with von Kossa staining indicated a close association of calcium and phosphorus ions. The mean Ca/P molar ratio in the calcium deposit area was 1.32+/-0.12. Microscopic cartilage thickness increased significantly with age (p<0.05), and was greater in males than in females (p<0.05). Cartilage cell density in the superficial cartilage layer was higher than in the deep layer and was decreased in group III (p<0.05). Cartilage cell density was lower in males compared to females. Diameter of chondrocytes significantly increased in group III (p<0.05) and was larger in males than in females in group III (p<0.05). Epiglottic cartilage exhibited marked sex-related differences and progression of calcification with age. Calcification of epiglottic cartilage in elderly individuals may affect movement patterns in deglutition.
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Affiliation(s)
- Mitsuhiro Kano
- Division of Dento-Oral Anesthesiology, Tohoku University Graduate School of Dentistry, Sendai, Japan.
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