Age and sex differences in lung elasticity, and in closing capacity in nonsmokers

1976 ◽  
Vol 41 (2) ◽  
pp. 129-135 ◽  
Author(s):  
F. R. Bode ◽  
J. Dosman ◽  
R. R. Martin ◽  
H. Ghezzo ◽  
P. T. Macklem

Static volume-pressure characteristics of the human lung, closing capacity (CC), closing pressure, and subdivisions of lung volumes were measured in 66 adult nonsmokers, aged 24–58 yr. There were systemic differences between the sexes as well as with age. Young females had less elastic recoil at any lung volume than young males. However, males lost elastic recoil with age faster than females so that in the older age groups the recoil was similar. There were no significant changes in compliance over the volume range containing most values of CC in either males or females. By comparing the age regression of CC and of elastic recoil pressures at 40 and 50% TLC we conclude that the increase in CC with age in males was attributable almost entirely to loss of recoil. In females none of the increase in closing capacity with age was attributable to loss of recoil. By exclusion, it is probably attributable to a change in the intrinsic properties of small airways or an increase in the pleural pressure gradient with age.

1977 ◽  
Vol 43 (6) ◽  
pp. 1054-1062 ◽  
Author(s):  
R. J. Knudson ◽  
D. F. Clark ◽  
T. C. Kennedy ◽  
D. E. Knudson

For plethysmographic studies of respiratory mechanics, we selected, from a general population, 51 subjects, aged 25–75 yr, who had never smoked, had no present or past cardiorespiratory symptoms or disease, were alpha1-antitrypsin MM phenotypes, and were normal by physical examination, vectorcardiography, and chest roentgenography. Approximately equal numbers of men and women were represented in each of three age groups; 25–35, 36–64, and 65–75. Both sexes demonstrated loss of lung elastic recoil with age, most significant at high lung volumes, but the rate of loss was less than previously reported. Males had higher lung recoil than females of comparable age, but if lung size was taken into account, there were no sex differences in bulk elastic properties. Maximum expiratory flow diminished with age only at low volumes, suggesting that equal pressure points are more centrally located at low lung volumes in the elderly.


2021 ◽  
Vol 29 (2) ◽  
pp. 173-194
Author(s):  
Mahmoud El Salman ◽  
Abdullah Al Fridan

Introduction. This paper is a sociolinguistic study that aims to investigate the speech of two groups in Al-Ahsa (Saudi Arabia) for the purpose of making a comparison between their speech. Methods. This study is empirical in its methods in that it is fully dependent on naturalistic speech. All the interviews, which were conducted in Al-Ahsa were conducted using the face-to-face technique for obtaining data with regard to linguistic variation. In this, the focus is on the Hasawi people and the Bedouins. Results. The study indicates that these two groups manipulate their dialect, in particular the key features of their dialects, to emphasize distinctiveness and negotiate identity. The study shows that while the linguistic behavior of the elderly in both groups is similar both within and outside of the group, the young generations show differences in their speech behavior. Additionally, group identity is very important to them. Outside the group, the possibility of interacting with members of the other group occurs, and, within this context, strong correlations appeared between linguistic factors and social factors, in particular the group identity among young males and gender distinctness among young females in both groups. Young males stereotypically tend to use the local linguistic forms, in particular the forms that are considered "the most salient feature which carries the social meaning of locality (Al-Wer, 1991: 75) and symbolizes local identities. The linguistic behavior of young males in both groups exhibits almost the same trends. Both are proud of the identity of the group to which they belong, particularly in gatherings in which other identities are present. Thus, unlike the two other age groups, the use of the /ts/ by the young Bedouin males and the use of the /EL/ by Hasawi young males increase in these settings rather than inside their own groups. This indicates that displaying one’s group identity is of significance to the young males in each group when a possible interaction takes place. While the use of the /EL/ among young Hasawis inside the group is 55.0%, its use was 70.0% in contexts outside the group and in the presence of other identities. The use of the /ts/ variant inside the group is 40%, while it is 60.0% outside the group. It also shows that the linguistic behavior of the Hisawi elderly is almost identical to the linguistic behavior of the elderly in the Bedouin group. In both groups, age (young, middle-aged or elderly) appears to be significant. Conclusion. The study shows that social competition is primarily expressed in the linguistic forms used. The more this social competition increases, the more unlikely the possibility of giving up one's social dialect becomes. People say much more through an accent than through the semantic content of the speech itself. To conclude, the study shows that social competition is frequently expressed in the linguistic forms used.


2020 ◽  
Vol 25 (2) ◽  
pp. 121-126
Author(s):  
V. G. Galonsky ◽  
N. V. Tarasova ◽  
V. V. Aliamovskii ◽  
I. S. Leonovich

Relevance. Separate issues in anthropomorphic sizes of relative norm of the ideal smile, its qualitative and qualitative parameters have not been addressed to sufficiently and are not properly reflected in scientific literature.Purpose. To determine distinguishing features in average smile parameters of the smile in male and female patients with orthognathic occlusion.Materials and methods. A clinical and anthropometric evaluation of parameters in main smile types was carried out for 150 young males and 150 young females aged 19-24 who had identical physiological development parameters.Results. It has been revealed that occurrence frequency of main smile types in patients with orthognathic occlusion has pronounced signs of sexual dimorphism which in over one half of the cases lies in predominance of the incisal smile type in males (52.7%) and the fascial type in females (55.3%). Occurence frequency of the cervical smile type totaled 25% among the studied patients of both genders. Average vertical size parameters in the incisal smile lies within the diapason of 3.91-4.91mm with surpassing by 1mm in males. Analogical data for the fascial smile type form the diapason of 6.21-6.73mm with surpassing by 0.52mm in females. The cervical smile type is characterised by larger vertical size forming the diapason of 7.94-8.91mm with surpassing by 0.97mm in males.Conclusion. The results of the study have shown that the “beautiful and ideal smile” is a relative concept having varied anthropometric characteristics and pronounced signs of sexual dimorphism lying in a broad spectrum of the dentofacial system norm notion with specific vectors for individual morphological deviations.


BMC Nursing ◽  
2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Linda Messineo ◽  
Luciano Seta ◽  
Mario Allegra

Abstract Background The efficient management of relational competences in healthcare professionals is crucial to ensuring that a patient’s treatment and care process is conducted positively. Empathy is a major component of the relational skills expected of health professionals. Knowledge of undergraduate healthcare students’ empathic abilities is important for educators in designing specific and efficient educational programmes aimed at supporting or enhancing such competences. In this study, we measured first-year undergraduate nursing students’ attitudes towards professional empathy in clinical encounters. The students’ motivations for entering nursing education were also evaluated. This study takes a multi-method approach based on the use of qualitative and quantitative tools to examine the association between students’ positive attitudes towards the value of empathy in health professionals and their prosocial and altruistic motivations in choosing to engage in nursing studies. Methods A multi-method study was performed with 77 first-year nursing students. The Jefferson Scale of Empathy (JSE) – Health Professions Student Version was administered. Students’ motivations for choosing nursing studies were detected through an open question and thematically analysed. Using explorative factor analysis and principal component analysis, a dimensional reduction was conducted to identify subjects with prosocial and altruistic motivations. Finally, linear models were tested to examine specific associations between motivation and empathy. Results Seven distinct themes distinguishing internal and external motivational factors were identified through a thematic analysis of students’ answers regarding their decision to enter a nursing degree course. Female students gained higher scores on the empathy scale than male ones. When students’ age was considered, this difference was only observed for younger students, with young females’ total scores being higher than young males'. High empathy scores were positively associated with altruistic motivational factors. A negative correlation was found between external motivational factors and the scores of the Compassionate Care subscale of the JSE. Conclusions Knowing the level of nursing students’ empathy and their motivational factors for entering nursing studies is important for educators to implement training paths that enhance students’ relational attitudes and skills and promote the positive motivational aspects that are central to this profession.


2016 ◽  
Author(s):  
Kusum Lata ◽  
Nutan Agarwal ◽  
Neerja Bhatla ◽  
Alka Kriplani

Objective: To find out the prevalence of epithelial ovarian tumors in young females and correlation with reproductive and survival outcome. Design: Retrospective study. Setting: Tertiary referral hospital. Methods: A retrospective analysis of females from 9-35 year of age group treated for ovarian tumors between January 2003 to July 2013 was performed. Variables studied included age, presenting symptoms, imaging, tumor markers, surgical findings, type of surgery, histopathology reports and follow-up. Main Outcome Measures: Histopathological variant, FIGO stage, reproductive and survival outcome. Results: A total of 155 patients were found to have ovarian tumors. Mean age at time of diagnosis was 24.9 ± 1.8 years (range 9-35). Clinical presentation in majority of the cases was abdominal pain in 68 (43.8%), ascites in 13 (8.3%) mass in abdomen in 25 (16%), followed by irregular menstrual cycles in 15 (9.6%), infertility in 18 (11.6%) 12 (7.7%) were found to be incidental on ultrasound examination while 4 women were found to have virilising symptoms. There were 76 (49.1%) cases of epithelial ovarian tumors, 6 (0.03%) of borderline tumors and 30 (19.3%) were of malignant ovarian tumors while 40 (25.8%) were benign. Stage IA (N = 80), Stage I 8 (n = 2), Stage III (N = 6) and Stage IV (N = 12). Females were further subdivided into three age groups 9-15 years, 15-25 years and 25 to 35 years for determining outcome of epitheliail tumors. Reproductive and survival outcome were studied in each stage. Conclusions: Limited data exists about the histological type distribution, surgical treatment and overall survival of epithelial ovarian tumors in women aged below 35 years. Young patients have higher overall progression-free survival and a better clinical outcome than older patients. Any women presenting with pain and nonspecific symptoms should be investigated and evaluated properly.


2019 ◽  
Vol 99 (1) ◽  
pp. 47-51 ◽  
Author(s):  
Shorook Na’ara ◽  
Igor Vainer ◽  
Moran Amit ◽  
Arie Gordin

Background: Foreign body aspiration (FBA) is a major cause of morbidity and mortality in children. It is a preventable event that predominates in preschool age. The signs and symptoms mimic respiratory diseases common in the same age-group. We compared FBA in infants to FBA in older children. Methods: Retrospective analysis of all the cases of suspected FBA of children under the age of 18 years hospitalized at one medical center during 2002 to 2016. We analyzed the data according to age: up to 1 year (infants) and 1 to 18 years. Results: One hundred seventy-five children with suspected FBA were admitted; of whom, 27 (15%) were infants and 148 (85%) were older children (age 1-18 years). For the 2 age groups, adults witnessed 85% and 73%, respectively, of the incidents ( P = .4). In the neonate group, 48% presented with normal X-ray findings compared to only 20% in the older group; 15% of the older group had a positive chest X-ray for a foreign body, while none had such in the infants’ group ( P = .01). For the 2 age groups, the majority of the FBs found were from organic origin. About half of the patients were diagnosed and managed within 24 hours of the aspiration event. In 10%, repeated bronchoscopy was performed due to a retained FB remnant. In a multivariate analysis, signs and symptoms ( P < .05), location of the FB ( P < .001), and witnessed aspiration ( P < .001) were independent prognostic factors for the length of hospitalization. Conclusion: Foreign body aspiration is not uncommon in young infants; the management is challenging due to small airways, the need to use smaller bronchoscopes, and the lack of working channel forces in pediatric bronchoscopes.


2022 ◽  
Vol 8 (1) ◽  
pp. 12-23
Author(s):  
Poonam Ohri ◽  
Shreeji Goya ◽  
Niveditha C ◽  
Manasi Kohli

Background: Knee is one of the major joints involved in kinesis. With increasing involvement in sports related activities especially in young people, Trauma related knee pathologies have increased. An accurate diagnosis regarding the type and extent of injuries is essential for early operative as well as non-operative treatment. Methods:This prospective study included total of 82 cases. The patients were referred to the department of Radiodiagnosis from indoor and outdoor departments of Guru Nanak Dev Hospital, Amritsar with suspicion of internal derangement of the knee and with history of knee trauma.Results:The most common age group involved was young males between 15-34 years. In all age groups most of the patients were males. Most common ligament to be injured was Anterior Cruciate Ligament (ACL). Partial tears were more common than complete tears. Posterior Cruciate Ligament (PCL) tears were less common. Medial Collateral Ligament (MCL) tears outnumbered Lateral Collateral Ligament (LCL) tears and grade 2 tears were more common in both. Among the meniscal injuries Medial Meniscus (MM) tears were more common than LM and grade 3 signal was more common in both. Most of the patellar retinaculum injuries were associated with Anterior Cruciate Ligament ACL tears.Conclusions:Post-traumatic pre-arthroscopic MR imaging evaluation has proved to be cost-effective. MRI is an accurate imaging modality complementing the clinical evaluation and providing a global intra-articular and extra-articular assessment of the knee.


Author(s):  
Jerianto Tawala Madja ◽  
Johan F. Koibur ◽  
Freddy Pattiselanno

Deer is a wild animal that has economi value and can be utilized by the commnity as a source of protein of animal origin so that the deer can be breed by the communty. In papua deer have been cultivated or breed in a relativery large scare. The purpose of cultivation or captivity is to know the daily behavior or deer timor (Cervus timorensis) in brooder breeding condtion with large numbers of pet populations. The time of study for ±one month is from the beginning of september to the and of september 2017. Using 10 sample from 24 deer in breeding, 3 aduit males, 2 young males, 3 adult females and 1 young females and 1 culf. Using time observation method with observation technique. Analyze data using exel to find the percen tage of social activity from each time period. Each time period was divided into I 06:00-08:00(6,48%); II 08:00-10:00(25,93%); III 10:00-12:00(19,44%); IV 12:00-14:00(7,41%); V 14:00-16:00(6,48) and VI 16:00-18:00(34,26). Our findings showed that social activity/interaction in group much more observed in the afternoon.


1987 ◽  
Vol 65 (10) ◽  
pp. 2519-2523
Author(s):  
Gregory H. Adler ◽  
Mark L. Wilson ◽  
Michael J. DeRosa

A population of Peromyscus leucopus (white-footed mouse) in northeastern Massachusetts was manipulated for 3 years to determine the effects of adults on survival and recruitment. Two experimental grids were established, from which either all adult males or all adult females were removed continually. The effects of these two manipulations were compared with demography on a control grid. Manipulations had no apparent effect on breeding intensity of young, survival rates of adults, or residency rates of adults and young. Recruitment of adult males was higher on the adult male removal grid than on the control grid. Recruitment rates of adult males and of young males and young females were lower on the adult female removal grid than on the control grid. Survival rates of young males were higher on the adult female removal grid than on the control grid; this effect may have been due to either reduced adult female residency or adult male recruitment. All differences between experimental and control grids were noted only during breeding seasons. Adult males apparently limited recruitment of adult consexuals. The effects of manipulations on other measured parameters were inconclusive because of high immigration rates of adult males onto the adult male removal grid and reduced recruitment of adult males and decreased production of young on the adult female removal grid.


1998 ◽  
Vol 274 (4) ◽  
pp. H1194-H1201 ◽  
Author(s):  
J. Andrew Taylor ◽  
Todd D. Williams ◽  
Douglas R. Seals ◽  
Kevin P. Davy

Low-frequency arterial pressure oscillations (Mayer waves) have been proposed as an index of vascular sympathetic outflow. However, cross-sectional differences in these pressure oscillations may not reflect different levels of sympathetic nervous outflow in humans. Three groups of healthy subjects with characteristically different sympathetic nervous outflow were studied: young females ( n = 10, 18–28 yr), young males ( n = 11, 18–29 yr), and older males ( n = 13, 60–72 yr). Average R-R interval, arterial pressures, and systolic pressure variability at the Mayer wave frequency (0.05–0.15 Hz) did not differ among the three groups. Diastolic pressure Mayer wave variability was similar in young females vs. young males (39 ± 10 vs. 34 ± 5 mmHg2) and lower in older males vs. young males (14 ± 2 mmHg2; P < 0.05). In contrast, muscle sympathetic activity was lowest in young females (892 ± 249 total activity/min) and highest in older males (3,616 ± 528 total activity/min; both P < 0.05 vs. young males: 2,505 ± 285 total activity/min). Across the three groups, arterial pressure Mayer wave variability did not correlate with any index of sympathetic activity. Our results demonstrate that arterial pressure Mayer wave amplitude is not a surrogate measure of vascular sympathetic outflow.


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