全文获取类型
收费全文 | 45篇 |
免费 | 5篇 |
专业分类
耳鼻咽喉 | 2篇 |
妇产科学 | 3篇 |
基础医学 | 2篇 |
口腔科学 | 1篇 |
临床医学 | 10篇 |
内科学 | 10篇 |
皮肤病学 | 1篇 |
神经病学 | 10篇 |
特种医学 | 2篇 |
外科学 | 3篇 |
预防医学 | 1篇 |
眼科学 | 2篇 |
肿瘤学 | 3篇 |
出版年
2023年 | 1篇 |
2021年 | 2篇 |
2020年 | 1篇 |
2018年 | 3篇 |
2017年 | 1篇 |
2016年 | 4篇 |
2015年 | 1篇 |
2013年 | 5篇 |
2012年 | 6篇 |
2011年 | 7篇 |
2010年 | 2篇 |
2009年 | 2篇 |
2008年 | 2篇 |
2007年 | 4篇 |
2006年 | 1篇 |
2005年 | 2篇 |
2003年 | 2篇 |
2002年 | 2篇 |
2001年 | 1篇 |
1984年 | 1篇 |
排序方式: 共有50条查询结果,搜索用时 31 毫秒
1.
There is a growing interest in prevention of mental disorders in children of mentally ill parents. Beardslee's preventive family intervention is a method recently introduced into Sweden. When asking parents to participate in this intervention, it has become evident how sensitive the issue of parenthood is to our patients. The study aims at exploring what depressed parents considered as obstacles and facilitating factors for accepting Beardslee's family intervention. Ten parents from two psychiatric clinics and one primary healthcare centre in northern Sweden were interviewed by semi-structured technique. Nine of these parents had accepted and participated in Beardslee's family intervention; one parent had been offered but refused participation. Data were analysed according to grounded theory. The main reason for taking part was the lack of dialogue these parents perceived with their children. There were difficulties in talking about and finding words to explain the depression. The parents were worried about their children, wishing to know how the children were actually feeling, and wanting the professionals to take a look at them. To open up was both frightening and tempting. It implied the consideration of many aspects: the right timing, shame and guilt, the partner's interest, the children's willingness and the involvement of professionals. The findings show the delicacy of the issue of children's well-being when a parent is depressed and they highlight some important topics to discuss with the parents when preventive interventions are offered. 相似文献
2.
Kukkonen H Rovamo J Donner K Tammikallio M Raninen A 《Investigative ophthalmology & visual science》2002,43(9):3131-3135
PURPOSE: Because of the limited contrast range, increasing the duration of the noise frame is often the only option for increasing the masking potency of external, white temporal noise. This, however, reduces the high-frequency cutoff beyond which noise is no longer white. This study was conducted to determine the longest noise frame duration that produces the strongest masking effect and still mimics white noise on the detection of sinusoidal flicker. METHODS: Contrast energy thresholds (E(th)) were measured for flicker at 1.25 to 20 Hz in strong, purely temporal (spatially uniform), additive, external noise. The masking power of white external noise, characterized by its spectral density at zero frequency N0, increases with the duration of the noise frame. RESULTS: For short noise frame durations, E(th) increased in direct proportion to N0, keeping the nominal signal-to-noise ratio [SNR = (E(th)/N0)(0.5)] constant at threshold. The masking effect thus increased with the duration of the noise frame and the noise mimicked white noise. When noise frame duration and N0 increased further, the nominal SNR at threshold started to decrease, indicating that noise no longer mimicked white noise. The minimum number of noise frames per flicker cycle needed to mimic white noise decreased with increasing flicker frequency from 8.3 at 1.25 Hz to 1.6 at 20 Hz. CONCLUSIONS: The critical high-frequency cutoff of detection-limiting temporal noise in terms of noise frames per signal cycle depends on the temporal frequency of the signal. This is opposite to the situation in the spatial domain and must be taken into consideration when temporal signals are masked with temporal noise. 相似文献
3.
Koskenkari J Rimpiläinen J Biancari F Surcel HM Kaukoranta P Kiviluoma K Ala-Kokko T Juvonen T 《Scandinavian cardiovascular journal : SCJ》2005,39(6):358-368
BACKGROUND: Ischemia-reperfusion injury secondary to leukocyte activation has been widely recognized as one of the most relevant mechanism leading to postoperative organ dysfunction occurring after a period of ischemia. The aim of the present study was to evaluate in a prospective, randomized study, the value of leukocyte depleting filter in patients undergoing elective coronary artery bypass surgery. METHODS: Twenty patients scheduled for elective on-pump coronary artery bypass surgery were randomized to undergo cardiopulmonary bypass either with a leukocyte depleting filter incorporated in the extracorporeal circulation arterial line or without a filter. RESULTS: The main finding of this study was the significantly lower postoperative concentrations of cardiac troponin I in the leukocyte filter group (Tests of between-subjects effects: p = 0.024). There were also slightly better cardiac indices in the leukocyte filter group. A larger amount of blood units was infused intra- and postoperatively in patients undergoing cardiopulmonary bypass with leukocyte filtration (median, 600 [IQR, 0-1200] vs. 0 [IQR, 0-600], p = 0.08). Two patients in the leukocyte filter group underwent reoperation for bleeding but none in the control group (p = 0.48). Intra-and postoperative platelet count was lower in the leukocyte filter group (Tests of between-subjects effects: p = 0.08). Despite a significant increased concentration of C-reactive protein on the first postoperative day in the control group (p = 0.029), repeated-measures analysis failed to show any significant increase during the study period (p = 0.33). CONCLUSIONS: The results of this study suggest a myocardial protective effect of leukocyte filter in the setting of elective coronary artery bypass surgery. 相似文献
4.
Erika Lyytikäinen Marjo Kaasila Eija Hiltunen-Back Matti Lehtinen Kaisa Tasanen Heljä-Marja Surcel Pentti Koskela Jorma Paavonen 《BMC infectious diseases》2008,8(1):169
Background
Reported rates of Chlamydia trachomatis are on the rise contradicting the declining rates of C. trachomatis associated reproductive sequelae in Western countries. Population based evaluation of the real trend of C. trachomatis infection is important to contemplate prevention efforts. We studied C. trachomatis occurrence during the past 20 years in Finland comparing incidence rate data based on serology and reported C. trachomatis laboratory notifications. 相似文献5.
Castro FA Haimila K Pasanen K Kaasila M Patama T Partanen J Surcel HM Pukkala E Lehtinen M 《International journal of STD & AIDS》2007,18(10):672-679
Cervical cancer (CxCa) is a long-term sequelae caused by persistent human papillomavirus (HPV) infection. Genetic susceptibility to the persistent infection and CxCa is associated with certain human leucocyte antigen (HLA) types. The same susceptibility genes may also determine whether a woman will be protected against the persistent infection and against CxCa by HPV vaccination or not. A systematic review of literature identified following HLAs to be associated with CxCa: A11 (odds ratio [OR] = 1.4, 95% confidence interval [CI] 1.1-2.0); B7 (1.5, 1.1-2.0); B15 (0.6, 0.4-0.8); DR2 (1.2, 1.1-1.4) and DR6 (0.6, 0.5-0.8). In the Caucasian population, HLA-B7 and DR6, and DR2 and B15 antigens showed at least borderline associations. In view of a bone marrow donor registry at the Finnish Red Cross and the Finnish Cancer Registry, we created geographic distribution maps of index HLA frequencies and CxCa incidence in the fertile-aged Finnish population. Increased incidence of CxCa was found in a region of western coastal Finland, where frequency of two CxCa susceptibility genes (HLA-DR2 and B7) was increased, and frequency of one CxCa resistance gene (HLA-B15) was decreased. Whether or not HLA type determines also regional susceptibility to persistent HPV infection, and the success of HPV vaccination in preventing both the persistent infection and CxCa warrants further investigation. 相似文献
6.
Tuija Männistö S. Ananth Karumanchi Anneli Pouta Marja Vääräsmäki Pauline Mendola Satu Miettola Heljä-Marja Surcel Aini Bloigu Aimo Ruokonen Marjo-Riitta Järvelin Anna-Liisa Hartikainen Eila Suvanto 《Pregnancy hypertension》2013,3(1):21-27
ObjectivesTo evaluate the effect of preeclampsia (PE) and gestational hypertension (GH) on subsequent hypothyroidism. Recent studies suggest that women with PE have increased risk for reduced thyroid function, but the association between PE and GH with overt hypothyroidism has not been examined.Study designTwo prospective population-based cohort studies, the Northern Finland Birth Cohorts 1966 and 1986, followed women who had PE (N = 955), GH (N = 1449) or were normotensive (N = 13531) during pregnancy. Finnish national registers were used to confirm subsequent hypothyroidism. Adjusted hazard ratios (aHRs) with 95% confidence intervals (CIs) estimated hypothyroidism risk when comparing women with PE or GH with normotensive women.Main outcome measuresPrimary hypothyroidism during follow-up of 20–40 years.ResultsThe subsequent prevalence of hypothyroidism was higher among women with PE (4.0%) and GH (4.5%) compared with normotensive women (3.5%), but the risk increase was not significant (aHR for PE 1.13, 95% CI 0.80–1.59 and aHR for GH 1.11, 95% CI 0.85–1.45).Subgroup analysis among nulliparous women revealed a significant association between late PE and subsequent hypothyroidism (aHR 1.82, 95% CI 1.04–3.19).Early or recurrent PE was not associated with hypothyroidism (aHR 0.93, 95% CI 0.46–1.81 and aHR 1.35, 95% CI 0.63–2.88, respectively).ConclusionsOverall, PE or GH during pregnancy was not significantly associated with subsequent hypothyroidism in Finnish women after 20–40 years of follow-up. However, late PE in nulliparous women was associated with a 1.8-fold increased risk of subsequent hypothyroidism, a finding that merits further study in other populations. 相似文献
7.
Aarne I. Oikarinen Riitta Palatsi Gerald E. Adomian Heljä Oikarinen Joan G. Clark Jouni Uitto 《Journal of the American Academy of Dermatology》1984,11(1):64-72
Three patients with localized cutaneous lesions characteristic of anetoderma were studied. Clinically, the onset of the disease was between the ages of 17 and 25, and numerous flaccid, saclike skin lesions developed over several subsequent years. Histologically, the lesions were characterized by paucity and fragmentation of the elastic fibers. Electron microscopy demonstrated that the elastic fibers, both in papillary and deep reticular dermis in the lesional skin, were fragmented and irregular in appearance. The concentration of elastin, determined by a radioimmunoassay of desmosine, an elastin-specific cross-link compound, was markedly reduced in the lesions, as compared with unaffected skin from the same patients or with normal skin from unrelated control subjects. In contrast, the concentrations of hydroxy pro line, an index of collagen, or deoxyribonucleic acid (DNA), a measure of cellularity, were not changed in the lesions. Thus, the results indicate that in the three patients studied, the elastic fibers are defective and reduced in quantity. These observations suggest that the deficiency of elastin in the dermis may lead to development of the cutaneous lesions of anetoderma. 相似文献
8.
9.
Heljä Oikarinen Salme Meriläinen Eija Pääkkö Ari Karttunen Miika T. Nieminen Osmo Tervonen 《European radiology》2009,19(5):1161-1165
The doses of radiation from computed tomography (CT) are relatively high, yet CT is being increasingly utilized. Furthermore,
the radiation-induced lifetime risk of cancer mortality is higher at younger age. The purpose of this study was to find out
whether previous CT examinations done on patients aged under 35 years were justified, and if not, whether there would have
been other, more justifiable imaging modalities available. Fifty CT examinations of the head and 30 CT examinations each of
the lumbar spine, cervical spine, abdomen, nasal sinuses and trauma were evaluated consecutively since the beginning of the
year 2005 by using electronic patient files, the referral guidelines for imaging recommended by the European Commission and
certain principles of classification. Seventy-seven per cent of the CT examinations of the lumbar spine, 36% of the head,
37% of the abdomen, 20% of the nasal sinuses and 3% of the cervical spine were unjustified. Most of these unjustified examinations
could have been replaced by magnetic resonance imaging. In order to reduce utilization of ionizing radiation, both the referring
practitioner and the radiologist responsible for the examination should carefully consider the justification for CT examinations
and the possibility of using other imaging modalities. 相似文献
10.
Katsiaryna Holl Eva Lundin Heljä‐Marja Surcel Kjell Grankvist Pentti Koskela Joakim Dillner Göran Hallmans Göran Wadell Gudridur H. Olafsdottir Helga M. Ögmundsdottir Eero Pukkala Matti Lehtinen Pär Stattin Annekatrin Lukanova 《International journal of cancer. Journal international du cancer》2009,124(12):2923-2928
According to the leading hypothesis on testicular cancer (TC) etiology exposure to a specific pattern of steroid hormones in utero, in particular, to high levels of estrogens and low levels of androgens is the major determinant of TC risk in the offspring. We performed a case–referent study nested within Finnish, Swedish and Icelandic maternity cohorts exploiting early pregnancy serum samples to evaluate the role of maternal endogenous steroid hormones with regard to the risk of TC. TC cases and referents were aged between 0 and 25 years. For each case‐index mother pair, three or four matched referent‐referent mother pairs were identified using national population registries. First trimester or early second trimester sera were retrieved from the index mothers of 73 TC cases and 286 matched referent mothers, and were tested for dehydroepiandrosterone sulfate (DHEAS), androstenedione, testosterone, estradiol, estrone, and sex hormone binding globulin (SHBG). Offspring of mothers with high DHEAS levels had a significantly decreased risk of TC (OR for highest vs. lowest DHEAS quartile, 0.18 (95% CI 0.06–0.58). In contrast, offspring of mothers with high androstenedione levels had an increased risk of TC (OR 4.1; 95% CI 1.2–12.0). High maternal total estradiol level also tended to be associated with an increased risk of TC in the offspring (OR 32; 95% CI 0.98–1,090). We report the first direct evidence that interplay of maternal steroid hormones in the early pregnancy is important in the etiology of TC in the offspring. © 2009 UICC 相似文献