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Ovid MEDLINE for KSOM Y1
Pamela M. Corley, MLS, AHIPAdrian Follette, MLISEvans Whitaker, MD, MLISJanis Brown, MLS, AHIPNorris Medical LibraryUniversity of Southern CaliforniaLos Angeles, CA 90089-9130
Melissa Just, MLIS, EdDDirector, Graff LibraryCity of Hope Hospital1500 East Duarte RoadDuarte, California 91010
Administrative Notes Introduction to personnel Synchronize clickers
“Go”, “4”, “1”, “Go”, “1/A” to test ASK QUESTIONS! Personal Librarian program – new this year.
Contact your “personal librarian” with information questions.
You can work with any of us, but this program gives you a designated contact.
Student last name
Personal Librarian Email Phone
AhnFecht Pamela Corley [email protected] (323) 442-1125
Fernandez Lee Eileen Eandi [email protected] (323) 442-1133
LeongPenman Adrian Follette [email protected] (323) 442-1972
PerrinYasmeh Evans Whitaker [email protected] (323) 442-1128
Personal Librarian Program
Additional Business This PowerPoint and the other documents that
go with the two sessions today will be posted to the Medical Student portal on the Norris Medical library website.
Fill out evaluation form; with your feedback we can continue to improve this presentation.
At the end of the session you will be asked to fill in emergency contact information on MyMedWeb site.
Introduction OvidSP – new product introduced February, 2008
Used for Literature Search Project -- Phases 1, 2, and 3 Enhanced features
Basic Search added Advanced Search similar to “old Ovid” Personal Account (free) allows user to save searches and
annotate articles This class and Literature Search Project 1, 2, and
3 will focus on MEDLINE searching. Other Ovid databases searched similarly
Level of experience?
4 Questions follow Vote with your clickers
Are you comfortable searching for medical information with Ovid MEDLINE or PubMed?
5%
37%
0%
16%
42%1. Very comfortable!
2. Yes
3. I can do it, but…
4. Not really
5. I am more comfortable at the dentist’s office!
Do you know how to use MeSH?
0% 0%5%
89%
5%
1. Always use MeSH when searching!
2. I know what it is but don’t use it
3. I may have heard the term…
4. Not familiar with it5. Yes, surgeons put it
in a hernia repair!
Are you familiar with the use of subheadings in MEDLINE searching?
0%
39%39%
22%
1. Yes, and I use them!
2. Yes.
3. Not really.
4. No.
Do you use the MeSH tree when searching?
0%
100%
0%
1. Yes
2. No, but I know what it is
3. I don’t know what that is
Ovid vs. PubMed Ovid
Commercial product, usually in academic libraries Multiple databases including MEDLINE Libraries subscribe to an information “package” -- the search engine plus
full text of books and journals PubMed
U.S. governmental bibliographic database Collaboration of National Library of Medicine (NLM), National Center
for Biotechnology Information (NCBI), and the National Institutes of Health (NIH)
Free to use, not easy to use well It is the only database of its size and scope in the world Estimated 40,000 biomedical journals world-wide, ~5,000 indexed in
MEDLINE ~18 x 106 citations in PubMed, 16.5 x 106 in MEDLINE
PubMed and MEDLINE OvidSP -- different interface and search
engine, same contents as MEDLINE
MEDLINE is a subset of PubMed.
The 1-2 million article difference is made up of both articles that are being processed and will move into MEDLINE, and articles which will never be included in MEDLINE (e.g., outside the scope of the database).
(18.2/16.8 as of 08/07/08)
Pros and Cons of Ovid MEDLINE Pros
Easier than PubMed, Advanced is good PubMed training Automatic “mapping” of search terms is more effective
than equivalent function in PubMed Basic search can be used at the speed of clinical medicine Basic and Advanced search modes work well together
Cons Expensive After your training, it is unlikely you will have access PubMed is more current; Ovid gets its material from PM
Other Ovid has a pay-per-use option
What Else is in Ovid? EBM (the three below and others)
Cochrane Database of Systematic Reviews DARE (Database of Abstracts of Reviews of Effects) ACP Journal Club
CINAHL -- allied health and nursing database Ovid Healthstar – “contains citations to the
published literature on health services, technology, administration, and research.”
Health and Psychosocial Instruments (HAPI) -- information on measurement tools for healthcare
Books @ Ovid (almost 400 books included)
Basic Ovid MEDLINE
How to search OvidSP Basic “Natural language” search engine Can combine and limit searches Good for:
locating a few good articles finding “the right words” for Advanced Ovid
Search
Ovid Basic – things to know and tips Searches yield 500 or more hits “Good stuff” is in the first 20-30. If nothing
relevant is found in that group, then reformulate search or move on to Advanced
Based on our experience at NML, use keywords without AND, OR, or punctuation. Seems to retrieve the smallest, most focused set of results
Advanced Ovid MEDLINE
Advanced Ovid Search Default at Norris Medical Library Good for a thorough, focused search Resembles previous versions of Ovid Steps in a search (see flow sheet in handouts)
Enter search concepts one at a time. Ovid translates the users terms into MeSH terms. User may choose MeSH terms, “explode”, “focus”, and apply sub-headings
Combine concepts (AND or OR) Limit results, e.g. English, humans, publication
types, publication years, etc.)
Definitions
Broaden/Narrow
MeSH
Focus
Explode
What is MeSH? Medical Subject Headings NLM indexers read papers, apply 5-10 agreed-
upon terms (“controlled vocabulary”) to describe the content of the papers
By looking up articles using MeSH terms you will find all the articles about a topic.
Remember…MEDLINE is a human enterprise and therefore contains human errors
Heart attack Myocardial infarction Coronary, Coronary occlusion Q wave, non-Q wave, transmural,
subendocardial All of the articles that use these variations are
discovered when you search under the MeSH term “myocardial infarction”
Myocardial infarction is separate from MeSH terms “angina” or “acute coronary syndrome”
Focus Intuitive Narrows your search Details: NLM personnel may label some
MeSH terms as main topics of an article. These topics are a “focus” of the article
MeSH tree/Explode Hierarchical structure of MEDLINE is similar to a
computer folder and file structure Pets
Dogs Boxers Labradors Chihuahuas
Cats Manx Siamese Persians
Explode broadens your search
Scope Notes Where ever you see
get more information
by clicking Scope Notes define terms
Advanced Ovid Search -Tips SUBHEADINGS narrow searches.
Do not use subheadings unless they match your needs. Do not overuse subheadings – not all concepts need
them, and few concepts need more than one or two. LIMITS narrow searches.
Do not overuse limits Apply them once at the end of devising your search
rather than using after each concept. Learn to use the “MeSH tree” and “scope notes”
The Search Process
Formulate your question This class is not about EBM or EBP, however many
of the same concepts apply. First, identify the “information need”. Define the clinical question, remove extraneous
details in order to make it “searchable”. Select concepts that will become search terms. Choose the most appropriate information source in
which to begin your search – it might be a book! Enter your search terms. Review results and reformulate search if necessary.
Identify, clarify your information need
Formulate the question
Break question into concepts, eliminate
extraneous
Enter term for Concept II
Combine concepts with AND or OR
Search
Print, save, email, or move results to
citation manager
Select best MeSH term
· “Explode”· Consider “Focus”· Consider Subheadings
Select best MeSH term
· “Explode”· Consider “Focus”· Consider Subheadings
Limite.g. humans, English, age, publication type
Evaluate ResultsIf necessary,
reformulate search
6 Steps to Better Advanced Ovid Searches
1.
2.
3.
4.
5.
6.
Enter term for Concept I
· Enter one concept per line · Remember to use scope notes and MeSH tree· “Explode” all concepts· “Focus” sparingly· Use Subheadings only when exactly match your search· Limit last!
No
tes:
Hands-On: Search 1 Your 63 y.o. patient brings in selenium 200
µg tablets. He had read that selenium helps to prevent prostate cancer.
He wants your advice before he starts taking selenium.
This is really two questions in one: Does selenium help prevent prostate cancer? Is selenium safe to take?
Search each question. What is your advice?
How to: Search 1 Main concepts:
Prostate cancer (prevention and control as subheading? Adverse effects as subheading?)
Selenium (therapeutic use as subheading?) Limits: English, human. Middle aged Male?
Hands-On: Search 2 62 y.o. male with history of MCA in 20s in which he
suffered a knee injury. Developed severe post-traumatic arthritis.
He is now scheduled to have total knee replacement. No other significant medical problems. What kind of preventive therapy would you
recommend to minimize his risk of blood clots in the leg veins post-operatively?
(Hint: total knee replacement is called Arthroplasty, replacement, knee)
How to: Search 2 Disease concept:
What is best term for blood clots in the leg? Subheading: Prevention and control?
Additional concepts: Knee joint replacement surgery (other possible
terms “orthopedic procedures” AND “knee”). Consider add “adverse effects” as subheading. “Post-operative complications”
Limits: English, humans. Middle age? Male?
Hands-On: Search 3 45 y.o. woman with depression, she has not
responded to several SSRIs. She continues with counseling, but is not making any substantial improvement.
You want to place her on other antidepressant types…either Wellbutrin, Effexor, or Cymbalta.
What can you find in the literature to predict your chances of pharmaceutical success?
How to: Search 3 Disease concept: Treatment resistant
depression Search as phrase or combine “depressive
disorder, major” (with “drug therapy” subheading) AND “drug resistance”
Additional concepts: treatment outcomes Limits: English, humans. Middle age?
Female?
Hands-On: Search 4
On your third year surgery rotation you have a patient in the hospital with Kaposi’s sarcoma of the rectum.
Your resident has not heard of this before. Do you have a reportable case?
GoogleScholar did not reveal anything.
How to: Search 4 How do you do this search? A simple way to approach this is to enter
“kaposis rectum” in basic search in Ovid. A few good articles appear in the first ten.
How to: Search 4 “Complete reference” shows the MeSH terms
for these good articles. You choose “neoplasm, rectal” and “sarcoma, Kaposi” this combination used on the 1950-current database reveals several articles, most of which appear pertinent.
You find to your dismay that your case is not unique enough to be reportable.
Final Exam (Time allowing)DIAGNOSIS 1. MRI for breast cancer screening, should this be our method
of choice? 2. PSA variations – PSA velocity, PSA density, free PSA
ratios – do these add value to prostate cancer screening?TREATMENT 3. Low back pain patients -- how effective (to decrease pain)
are chiropractic and acupuncture therapies? Are there studies that compare these modalities?
4. Operative vs. non-operative treatment for acute Achilles tendon ruptures – which is better?
Assignment Look at Literature Search Project handout. You will complete one of seven questions. Key points:
Use Advanced Ovid. Use MeSH, focus, explode, subheadings, and limits to get
full points on assignment Pick 5 relevant articles. Do not include comments, letters
to the editor, foreign language articles Include abstracts (default setting) Display your work and print it, save a copy for backup
Summary Ovid provides an easy-to-learn MEDLINE
search engine. Effective information finding and analysis are
important skills in modern medicine. Today’s session presented Ovid MEDLINE,
and provided search practice. Mastery of any skill requires practice and
thought; searching is no exception
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