Questions? Find citations on the therapy of earache with antibiotics written in English and published since 2000.

Transcription

1 Questions? Find an article studying on the clinical application of benazepri published in NEJM, and written by Prof. Hou Fanfan who works in Nanfang Hospital. 1

2 Questions? Find citations on the therapy of earache with antibiotics written in English and published since

3 Guide to Searching PubMed Department of Medical Information Science May 18, 2010 Gu Ping Prof.,PhD 3

4 Class Outcomes for PubMed Understand PubMed's scope and content Develop search strategies Display and save search results Use Limits and Clipboard features 4

5 Class Outcomes Cont d Use PubMed services: MeSH Database, Journals Database and Single Citation Matcher Links to full-text articles and other resources 5

6 What is PubMed? An on-line database developed by the National Library of Medicine that provides free access to MEDLINE records and other citations. 6

7 What can you get from PubMed? An article s summary or abstract information Full-text links to free or charged articles 7

8 Address of PubMed Free access 8

9 Query box where you enter your search terms PubMed HomePage 9

10 PubMed Outline Overview How to Search* Working With Search Results* Major Points 10

11 PubMed Overview Free to anyone with Internet access Search interface from the U.S. National Library of Medicine (NLM) Provides access to over 19 million citations in MEDLINE, OLDMEDLINE, plus In Process and Publisher Supplied records 11

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13 Overview Cont d Citations are from the 1948 to the present and come from more than 4,900 biomedical journals published in the United States and 70 additional countries Covers the fields of medicine, nursing, dentistry, pharmacy, and other areas of the life sciences 13

14 How to Search in PubMed Boolean Operators Truncation Phrase Searching Basic Search* Advanced Search* Limits 14

15 Boolean Operators Includes AND, OR, and NOT They MUST be capitalized in a search Uses when searching for more than one concept or search statement 15

16 Boolean Operators Cont d AND OR NOT influenza AND vaccination vaccination OR vaccine influenza NOT vaccination 16

17 Order of Boolean Operators The one on the left is processed first E.g., influenza AND vaccine OR vaccination would retrieve articles that had both influenza and vaccine and it would also retrieve all articles on vaccination (pneumonia, measles, tetanus, etc.) To change the meaning, use parentheses: influenza AND (vaccine OR vaccination) 17

18 Truncation Used when you want to find all terms that begin with a given word stemming Uses the symbol asterisk* as a substitute for zero or more characters e.g., risk* retrieves risk, risks, risk-taking Uses the first 150 variations with the root 18

19 Phrase Searching Automatically finds logical phrases from a list To insure that phrase is recognized, use double quotes or use a search tag [tw], e.g., " otitis media ". 19

20 Basic Search Doing a keyword search Doing a specific field search Doing an author search Doing a journal title search 20

21 Keyword Search Qs: The parents of a 5-year-old surgical patient ask you if it would be possible for them to be present during the administration of anesthesia so as to reduce their child's fear of the procedure. 21

22 What We Know from Our Case Our patient is a 5-year-old child Her parents wish to be present during anesthesia induction 22

23 Type "anesthesia induction" in the for box, and click SEARCH 23

24 Type "parental presence " in the for box, and click SEARCH 24

25 To combine your search, click on the Advanced Search link 25

26 Notice the number of hits: 7 26

27 Searching in a Specific Field Tag the search term by adding the appropriate search tag The search tag must be enclosed in square brackets. Case and spacing do not matter (e.g., crabs [mh] = Crabs[mh]) 27

28 Search Field Descriptions and Tags 28

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32 Searching by Author Enter the author s name in the format of last name followed by initials. Omit punctuation. e.g., Smith BJ Use the [au] search tag if the author name is also a subject term. If only the author's last name is entered, tag the name search with the author search field [au], to find the name in the author field only. 32

33 Journal Title Search Enter in the search box one of the following: full journal title (e.g., molecular biology of the cell) title abbreviation (e.g., mol biol cell) ISSN number, a standardized international code (e.g., ) To find full journal names, use the Journals database 33

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35 Advanced Search MeSH Database Journals Database Single Citation Matcher Advanced Search Page Clinical Queries 35

36 MeSH Database Locate and select MeSH terms (Headings, Subheadings & Publication Types) See the definition and other helpful information for a MeSH term Build a PubMed search strategy 36

37 MeSH Database Cont d Display MeSH terms in the hierarchy Limit MeSH terms to a major concept for a search Attach subheadings for a search 37

38 Click MeSH Database 38

39 MeSH Database Tips To build a search strategy for a topic: Enter a term in the query box Hit the Go button Qs: suppose you are looking for the negative effects associated with the use of sedatives 39

40 Click on the MeSH term sedatives most relevant to you 40

41 Full display for the MeSH term 41

42 Full display for the MeSH term Synonyms of term MeSH tree structure with entered term in bold 42

43 Example: negative effects of sedatives To narrow your search to the negative effects of sedatives : Select the adverse effects, poisoning & toxicity subheading from the full display screen Click on Restrict Search to Major Topic Headings only Select Search Box with AND from the Send to pulldown menu 43

44 Checkmark Subheadings, and then, Select Search box with AND 44

45 Click the Search PubMed button to complete the search 45

46 Journals Database Used when to look up a journal by title, ISSN, MEDLINE journal abbreviation or ISO abbreviation to search for citations from that journal. Check the Suggestions if the journal name does not display in the results. Choose PubMed under the Links menu to search for the journal. 46

47 Click Journals Database Below More Resources or drop-down to Journals Type the journal name in the for box. Then, click Go. 47

48 Single Citation Matcher Allows you to find a single citation with an easy, fill-inthe-blank format, including journal name, volume, issue, page number, publication year, author and title word 48

49 Example: Use when a citation you have appears to be incorrect Say you have following information, but when you look it up, it is not your article: Koutinas, Asymptomatic bacteriuria in puppies. Vet Microbiol, 64,

50 Single Citation Matcher 50

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52 Advanced Search Page Search Builder Search History 52

53 Clinical Queries Search by a clinical study category, find systematic reviews and run medical genetics searches Clinical Study Category uses built-in search filters that will limit retrieval to citations to articles reporting research conducted with specific methodologies, including those that report applied clinical research 53

54 Clinical Queries 54

55 Clinical Queries Systematic Reviews cover a broad set of articles that build consensus on biomedical topics Medical Genetics Searches find citations related to topics in medical genetics 55

56 Limits Allows you to refine your query by making your search more specific which may allow for more relevant citation retrieval. Includes full text or free full text, age group, gender, humans or animals studies, languages, publication types, dates, and other parameters, etc. 56

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58 Working With Search Results The Search Results Screen Display Settings The Send to pull-down menu My NCBI Viewing Full-Text Icons (Southern Medical University only) 58

59 The Search Results Screen Active query box displays current search Number of Citations Citations are displayed in a summary format. This includes author, title and source information. 59

60 Display Settings The pull down menu next to the Display Settngs allows the user to select different display formats To select a display option: Choose a display option from the pull-down menu 60

61 Summary Format (default) Click the title to get to the Abstract Format Title of article Links: includes links to related articles Tags Author s name(s) Article source: provides the journal title abbreviations, date of publication, volume, issue and page numbers 61 of the article

62 Abstract Format Links to full-text article at provider s Web site, if available 62

63 The Send to pull-down menu File Clipboard Collections 63

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65 File Saves your search results to a file: Use the Display pull-down menu to select the format you desire Choose the File option from the Send to pulldown menu PubMed will then ask you to name the file. You can then save to your hard drive or to a floppy disc 65

66 Clipboard Collects and stores selected citations from multiple searches: Click on the check box to the left of the citations you would like to keep. If you do not select individual citations, PubMed will add the entire retrieval (up to 500 citations) to the Clipboard. Choose the Clipboard option from the Send to pulldown menu 66

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69 your search results to yourself or anyone you desire: Choose the format type you would like (summary, abstract, etc.) Select how you would like the citations sorted Choose the file type you would like the list to be saved as Choose how many of the citations you would like to have sent Enter the address you are sending the list to Enter a message along with the , if desired 69

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71 Collections Save your search results to a permanent collection 71

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74 My NCBI My NCBI is a tool which can: Save searches and/or bibliographies Set up automatic updates of searches Manage searches and update schedules Select filtering options to customize and group search results 74

75 Saving Search Strategies If you want to save your search strategy so you can go back later and see how you got those results or you want to keep upto-date on a topic and run the same search every week, month, etc, PubMed will allow you to do that 75

76 Saving a Search Strategy 76

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78 Setting Up Automatic Updates When you click on Save Search, you are asked if you would like to receive updates of new search results automatically and according to a schedule that you determine 78

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80 Saving Collections of Bibliographies Saving results to a permanent collection 80

81 My NCBI Filter Tabs Use the filters to group search results by areas of interest. You may set up to five tabs which appear below the Display/Show command boxes. Your filter selections are in effect only when signed in to My NCBI. 81

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83 Viewing Full-Text Icons (Southern Medical University only) You can check to see if the Southern Medical University Library has a journal in its online collection. To view the SMU Library' holdings, display your records in the "Abstract" displays. 83

84 If the journal is available online through the SMUL, you will see a " 南方医科大学图书馆网络资源 " icon. Click on this icon to go to the full-text of that article. 84

85 Drag down to read full-text or click Full Text (PDF) 85

86 Here s the PDF version 86

87 Free Full-Text Articles Articles that are available for free through PubMed will show varying icons stating "Free full text articles. Below are some examples: 87

88 Major Points Look for the full-text icons (electronic or print) Use the MeSH database for official terms, subheadings, and restrictions Use the tutorials in PubMed to become an expert searcher Use the Limits page to narrow search (decrease the number of hits) 88

89 Major Points, Cont d Use the Journals database to get the complete journal title and ISSN Click on PubMed s Help button to learn about truncation, phrase searching and more! Be aware that double quotes and the asterisk * can retrieve different hits! 89

90 Major Points Cont d Use the History function to combine and review searches Capitalize Boolean operators, AND, OR, NOT Explode terms to increase or broaden the search 90

91 Contact Information: Gu Ping Prof.,Ph.D Director of SMU Library

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