Meneghini R, Gibson W, Halsey D, Padgett D, Berend K, Della Valle CJ The American Association of Hip and Knee Surgeons, Hip Society, Knee Society, and American Academy of Orthopaedic Surgeons Position Statement on Outpatient Joint Replacement. J Arthroplasty. 2018 Dec;33(12):3599-3601. doi: 10.1016/j.arth.2018.10.029.
Meneghini RM, Ziemba-Davis M, Ishmael MK, Kuzma AL, Caccavallo P Safe Selection of Outpatient Joint Arthroplasty Patients With Medical Risk Stratification: the "Outpatient Arthroplasty Risk Assessment Score". J Arthroplasty. 2017 Aug;32(8):2325-2331. doi: 10.1016/j.arth.2017.03.004. Epub 2017 Mar 14.
Sher A, Keswani A, Yao DH, Anderson M, Koenig K, Moucha CS Predictors of Same-Day Discharge in Primary Total Joint Arthroplasty Patients and Risk Factors for Post-Discharge Complications. J Arthroplasty. 2017 Sep;32(9S):S150-S156.e1. doi: 10.1016/j.arth.2016.12.017. Epub 2016 Dec 22.
Ziemba-Davis M, Caccavallo P, Meneghini RM Outpatient Joint Arthroplasty-Patient Selection: Update on the Outpatient Arthroplasty Risk Assessment Score. J Arthroplasty. 2019 Jul;34(7S):S40-S43. doi: 10.1016/j.arth.2019.01.007. Epub 2019 Jan 15.
Incidence of 30 Day Return to Hospital Following Same Day Discharge Total Hip Arthroplasty
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
