全文获取类型
收费全文 | 559篇 |
免费 | 94篇 |
国内免费 | 9篇 |
专业分类
耳鼻咽喉 | 6篇 |
儿科学 | 15篇 |
妇产科学 | 3篇 |
基础医学 | 51篇 |
口腔科学 | 6篇 |
临床医学 | 112篇 |
内科学 | 98篇 |
皮肤病学 | 23篇 |
神经病学 | 70篇 |
特种医学 | 86篇 |
外科学 | 36篇 |
综合类 | 19篇 |
现状与发展 | 1篇 |
预防医学 | 48篇 |
眼科学 | 3篇 |
药学 | 47篇 |
肿瘤学 | 38篇 |
出版年
2024年 | 4篇 |
2023年 | 25篇 |
2022年 | 6篇 |
2021年 | 7篇 |
2020年 | 20篇 |
2019年 | 10篇 |
2018年 | 18篇 |
2017年 | 23篇 |
2016年 | 22篇 |
2015年 | 11篇 |
2014年 | 19篇 |
2013年 | 19篇 |
2012年 | 15篇 |
2011年 | 11篇 |
2010年 | 19篇 |
2009年 | 17篇 |
2008年 | 21篇 |
2007年 | 19篇 |
2006年 | 8篇 |
2005年 | 12篇 |
2004年 | 18篇 |
2003年 | 14篇 |
2002年 | 15篇 |
2001年 | 11篇 |
2000年 | 10篇 |
1999年 | 17篇 |
1998年 | 20篇 |
1997年 | 8篇 |
1996年 | 6篇 |
1995年 | 10篇 |
1994年 | 22篇 |
1993年 | 11篇 |
1992年 | 15篇 |
1991年 | 13篇 |
1990年 | 13篇 |
1989年 | 16篇 |
1988年 | 16篇 |
1987年 | 16篇 |
1986年 | 11篇 |
1985年 | 12篇 |
1984年 | 12篇 |
1983年 | 11篇 |
1982年 | 5篇 |
1981年 | 7篇 |
1980年 | 10篇 |
1978年 | 7篇 |
1977年 | 3篇 |
1975年 | 4篇 |
1972年 | 3篇 |
1971年 | 5篇 |
排序方式: 共有662条查询结果,搜索用时 16 毫秒
11.
A modified lightwand-guided nasotracheal intubation technique for oromaxillofacial surgical patients
Kuang-I Cheng MD Assistant Professor Ming-Chih Chang DDS MDS Visiting Staff Ta-Wei Lai MD Visiting Staff Ya-Chun Shen BD Nurse-Anesthetist David-vi Lu MD Visiting Staff Shang-Tsung Lai DDS MDS Associate Professor Chung-Ho Chen DDS PhD Professor 《Journal of clinical anesthesia》2009,21(4):258-263
Study ObjectiveTo investigate the efficiency of a double curve nasotracheal tube on lightwand-guided nasotracheal intubation.DesignProspective, randomized, controlled trial.SettingUniversity medical center hospital.Patients60 ASA physical status I and II patients undergoing oromaxillofacial surgery.Interventions and MeasurementsPatients undergoing surgery with nasotracheal intubation and general anesthesia were randomly enrolled in the laryngoscopy group or the lightwand group. The same type of double curve nasotracheal tube was used in both groups. In the laryngoscopy group, intubation was assisted with a Macintosh No. 3 standard curved blade and Magill forceps. In the lightwand group, intubation was aided with a flexible lightwand device (without the inner stiff stylet). Intubation time was divided into two parts: Part one, from selected naris to oropharynx; Part two, from oropharynx into trachea. Part one, Part two, and total intubation time, hemodynamic responses to nasotracheal intubation, and adverse events or complications were recorded.Main ResultsTotal intubation times in the lightwand group and the laryngoscopy group were 22.8 ± 8.0 sec vs 30.3 ± 8.2 sec (P < 0.001), respectively. The lightwand group had comparable hemodynamic responses to those of the laryngoscopy group. Adverse events and complications were all self-limited, with similar occurrence in both groups.ConclusionFor patients undergoing oromaxillofacial surgery, modified lightwand-guided nasotracheal intubation is feasible with a double curve nasotracheal tube and is an efficient alternative technique. 相似文献
12.
Ross BD; Jacobson S; Villamil F; Korula J; Kreis R; Ernst T; Shonk T; Moats RA 《Radiology》1994,193(2):457
13.
Lindsey M. Philpot Priya Ramar Muhamad Y. Elrashidi Tiffany A. Sinclair Jon O. Ebbert 《Mayo Clinic proceedings. Mayo Clinic》2018,93(10):1431-1439
Objective
To evaluate the impact of opioid controlled substance agreements (CSAs) enrollment on health care utilization.Patients and Methods
We retrospectively evaluated health care utilization changes among 772 patients receiving long-term opioid therapy for chronic noncancer pain enrolled in a CSA between July 1, 2015, and December 31, 2015. We ascertained patient characteristics and utilization 12 months before and after CSA enrollment. Decreased utilization was defined as a decrease of 1 or more hospitalizations or emergency department visits and 3 or more outpatient primary and specialty care visits. Multivariate modeling assessed demographic characteristics associated with utilization changes.Results
The 772 patients enrolled in an opioid CSA during the study period had a mean ± SD age of 63.5±14.9 years and were predominantly female, white, and married. The CSA enrollment was associated with decreased outpatient primary care visits (odds ratio [OR], 0.16; 95% CI, 0.14-0.19) and increased diagnostic radiology services (OR, 1.22; 95% CI, 1.02-1.47). After CSA enrollment, patients with greater comorbidity (Charlson Comorbidity Index score >3) were more likely to have reduced hospitalizations (adjusted OR, 2.8; 95% CI, 1.3-6.0; P=.008), reduced outpatient primary care visits (adjusted OR, 2.0; 95% CI, 1.2-3.2; P=.005), and reduced specialty care visits (adjusted OR, 2.0; 95% CI, 1.2-3.3; P=.006).Conclusion
For patients receiving long-term opioid therapy for chronic noncancer pain, CSA enrollment is associated with reductions in primary care visits and increased radiologic service utilization. Patients with greater comorbidity were more likely to have reductions in hospitalizations, outpatient primary care visits, and outpatient specialty clinic visits after CSA enrollment. The observational nature of the study does not allow the conclusion that CSA implementation is the primary reason for these observed changes. 相似文献14.
15.
Concurrent use of intranasal and orally inhaled fluticasone propionate does not affect hypothalamic-pituitary-adrenal-axis function. 总被引:2,自引:0,他引:2
Ketan K Sheth Cindy K Cook Edward E Philpot Barbara A Prillaman Lori A Witham Melissa A Faris Kristofer C Klein Kathleen A Rickard 《Allergy and asthma proceedings》2004,25(2):115-120
Two double-blind, randomized, placebo-controlled, parallel group safety and efficacy studies included evaluation of the hypothalamic-pituitary-adrenal (HPA)-axis effects of concurrent treatment with intranasal and orally inhaled fluticasone propionate (FP). In the first study, patients with asthma who were > or =12 years of age were assigned randomly to receive twice-daily doses (either 88 or 220 microg) of orally inhaled FP delivered from a metered-dose inhaler (MDI). In the second study, patients were assigned randomly to receive either orally inhaled FP 250 microg or orally inhaled FP 250 microg/salmeterol 50 microg delivered via the Diskus device. In both studies, patients with rhinitis were allowed to continue the use of intranasal FP at their usual dosing. Treatment periods were 26 weeks and 12 weeks for the MDI and Diskus studies, respectively. HPA-axis effects were assessed using response to short cosyntropin stimulation testing. The number and percentage of patients with an abnormal cortisol response, defined as a morning plasma cortisol of <5 microg/dL, a poststimulation peak of <18 microg/dL, or a poststimulation rise of <7 microg/dL, were summarized in two subgroups: patients who used intranasal FP and those who did not. The concurrent administration of intranasal FP and orally inhaled FP via an MDI or Diskus or via Diskus with salmeterol was not associated with HPA-axis effects compared with orally inhaled FP alone. The results of these two studies suggest that concurrent use of intranasal FP with orally inhaled FP administered via MDI or Diskus for treatment of comorbid rhinitis and asthma does not increase the risk of HPA-axis abnormalities. 相似文献
16.
17.
18.
19.
Hua Zhang PhD Shaodong Qiu BD Fei Chen PhD Zhimin Zhu MD 《Journal of clinical ultrasound : JCU》2019,47(7):412-418
Because of better awareness and understanding of its pathophysiology, the cardiorenal syndrome (CRS) is more often diagnosed and better managed. The echocardiographic evaluation of CRS now benefits from three-dimensional speckle tracking echocardiography (3D-STE), which allows multidimensional and real-time evaluation of regional myocardial and overall cardiac function, and helps assessing the degree of myocardial damage. This article describes the application of 3D-STE in evaluating the myocardial motion in patients with CRS. 相似文献
20.
Jeffrey DeWester Edward E Philpot Ronald E Westlund Cindy K Cook Kathleen A Rickard 《Allergy and asthma proceedings》2003,24(5):331-337
Intranasal corticosteroids have been shown to decrease ocular symptoms associated with allergic rhinitis as well as nasal symptoms. The primary objective of this retrospective analysis was to evaluate the efficacy of fluticasone propionate (FP) aqueous nasal spray in the treatment of ocular symptoms in patients with seasonal allergic rhinitis (SAR). We pooled efficacy data from seven multicenter, randomized, double-blind, placebo-controlled studies of similar design. Each study evaluated the efficacy of intranasal FP, 200 micrograms, given once daily in the treatment of nasal and ocular symptoms associated with SAR. At baseline and after 7 and 14 days of treatment, clinicians rated the severity of four individual ocular symptoms (itching, tearing, redness, and puffiness) via visual analog scales of 0-100, where 0 = no symptoms and 100 = worst symptoms. The four ratings were added to form the total ocular symptom score (TOSS). Patients rated the overall severity of their ocular symptoms (all symptoms evaluated with a single score) daily on diary cards in a similar fashion. The primary outcome was the mean change from baseline in the clinician-rated TOSS. A between-group difference of 25 points in the mean change from baseline TOSS by day 14 was considered clinically relevant. The FP group had greater mean changes from baseline in the TOSS and in all four individual symptom scores compared with placebo at days 7 and 14. At day 7, mean decreases from baseline in the TOSS were 76.0 points for the FP group and 50.9 points for the placebo group (p < 0.001), a difference between groups of 25.1. At day 14, mean decreases from baseline in the TOSS were 91.8 points for the FP group and 60.2 points for the placebo group (p < 0.001), a difference between groups of 31.6. Consistent with the clinician-rated data, patient-rated data showed a significantly greater reduction in the overall ocular symptom score for the FP group compared with placebo for both weeks 1 and 2 (p < 0.001). Intranasal FP provides safe and effective relief of ocular symptoms associated with SAR. Patients with allergic rhinitis who also have ocular symptoms as a component of their disease may benefit from intranasal FP monotherapy without the addition of topical ophthalmologic agents or oral antihistamines. Such an approach may have advantages regarding compliance and cost-effectiveness of treatment. 相似文献