The histological microstructure and in vitro mechanical properties of pregnant and postmenopausal ewe perineal body

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023698%3A_____%2F19%3AN0000019" target="_blank" >RIV/00023698:_____/19:N0000019 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11120/19:43918740 RIV/00216208:11140/19:10402400 RIV/49777513:23520/19:43957151 RIV/00669806:_____/19:10402400

Výsledek na webu

<a href="https://doi.org/10.1097/GME.0000000000001395" target="_blank" >https://doi.org/10.1097/GME.0000000000001395</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1097/GME.0000000000001395" target="_blank" >10.1097/GME.0000000000001395</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The histological microstructure and in vitro mechanical properties of pregnant and postmenopausal ewe perineal body

Popis výsledku v původním jazyce

The mechanical properties and microstructure of the perineal body are important for the improvement of numerical models of pelvic organs. We determined the mechanical parameters and volume fractions of the ewe perineal body as an animal model. METHODS: The 39 specimens of 13 pregnant swifter ewes delivering by cesarean section (aged 2 years, weight 61.2 +- 6.2 kg (mean +- standard deviation) and 24 specimens of 8 postmenopausal swifter ewes 150 days after surgical ovariectomy (aged 7 years, 58.6 +- 4.6 kg)) were loaded uniaxially to determine Young's moduli of elasticity in the small (E0) and large (E1) deformation regions, and ultimate stresses and strains. The 63 adjacent tissue samples were processed histologically to assess volume fractions of smooth and skeletal muscle, adipose cells, elastin, and type I collagen using a stereological point testing grid. We compared the structural and mechanical differences along the ewe perineal body, and between pregnant and postmenopausal groups. RESULTS: The pregnant/postmenopausal perineal body was composed of smooth muscle (12/14%; median), skeletal muscle (12/16%), collagen (10/23%), elastin (8/7%), and adipose cells (6/6%). The E0 was 37/11 kPa (median), E1 was 0.97/1.04 MPa, ultimate stress was 0.55/0.59 MPa, and ultimate strain was 0.90/0.87 for pregnant/postmenopausal perineal body. The perineal body showed a structural and mechanical stability across the sites. The pregnant ewes had a higher amount of skeletal muscle, higher E0, and a less amount of collagen when compared with postmenopausal ewes. CONCLUSIONS: The data can be used as input for models simulating vaginal delivery, pelvic floor prolapsed, or dysfunction.

Název v anglickém jazyce

The histological microstructure and in vitro mechanical properties of pregnant and postmenopausal ewe perineal body

Popis výsledku anglicky

The mechanical properties and microstructure of the perineal body are important for the improvement of numerical models of pelvic organs. We determined the mechanical parameters and volume fractions of the ewe perineal body as an animal model. METHODS: The 39 specimens of 13 pregnant swifter ewes delivering by cesarean section (aged 2 years, weight 61.2 +- 6.2 kg (mean +- standard deviation) and 24 specimens of 8 postmenopausal swifter ewes 150 days after surgical ovariectomy (aged 7 years, 58.6 +- 4.6 kg)) were loaded uniaxially to determine Young's moduli of elasticity in the small (E0) and large (E1) deformation regions, and ultimate stresses and strains. The 63 adjacent tissue samples were processed histologically to assess volume fractions of smooth and skeletal muscle, adipose cells, elastin, and type I collagen using a stereological point testing grid. We compared the structural and mechanical differences along the ewe perineal body, and between pregnant and postmenopausal groups. RESULTS: The pregnant/postmenopausal perineal body was composed of smooth muscle (12/14%; median), skeletal muscle (12/16%), collagen (10/23%), elastin (8/7%), and adipose cells (6/6%). The E0 was 37/11 kPa (median), E1 was 0.97/1.04 MPa, ultimate stress was 0.55/0.59 MPa, and ultimate strain was 0.90/0.87 for pregnant/postmenopausal perineal body. The perineal body showed a structural and mechanical stability across the sites. The pregnant ewes had a higher amount of skeletal muscle, higher E0, and a less amount of collagen when compared with postmenopausal ewes. CONCLUSIONS: The data can be used as input for models simulating vaginal delivery, pelvic floor prolapsed, or dysfunction.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

30214 - Obstetrics and gynaecology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Menopause

ISSN

1072-3714

e-ISSN

1530-0374

Svazek periodika

26

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

1289-1301

Kód UT WoS článku

000509483500011

EID výsledku v databázi Scopus

2-s2.0-85072100817