Optical Coherence Tomography (OCT) machines are non-contact instruments that can measure the depth of scars and other causes of cloudiness in the front of the cornea. The purpose of this study is to determine whether OCT-guided settings for the lasers used for removal of corneal scars and other partial-thickness corneal defects result in improved vision in patients receiving these procedures.

Type: Interventional

Start Date: Jun 2011

open study

The long-term goal of this project is to utilize very high-speed optical coherence tomography (OCT) technology to guide surgical treatments of corneal diseases. OCT is well known for its exquisite resolution, but until recently it has not had sufficient speed to capture the shape of the cornea because of eye motion during OCT scanning. The development of Fourier-domain (FD) OCT technology has made the requisite speed possible. The objective of this project is to develop methods for imaging the cornea with an FD-OCT system that will precisely measure corneal shape and use this information to guide surgery. Cataract surgery in patients with previous laser vision correction often leads to significant near- or far-sightedness, a problem that could be resolved by using a more accurate intraocular lens power selection formula based on the measurement of corneal refractive power with OCT.

Type: Observational

Start Date: Apr 2011

open study

The goal of this clinical trial is to test the effectiveness of a 6-week socialization and sex education curriculum (STEPS2) in young people (aged 16-27 years) with intellectual and developmental disabilities (I/DD), including people with Down syndrome. The main question it aims to answer is: Does the STEPS2 health education curriculum increase the proportion of individuals who: 1. have had a discussion with a medical professional about their sexual health (including sexually transmitted infection testing for those who are sexually active); 2. know whether they have had the HPV vaccination; 3. have had the HPV vaccination; 4. know what sex is; and 5. know how people get pregnant. These are the primary outcomes which are being measured one year after study enrollment. Secondary outcomes include knowledge around sexual health and behaviors around contraception and STI prevention among those sexually active at baseline, as well as satisfaction with the intervention. Participants are randomized to receive either the socialization and sex education curriculum in the experimental group, called the STEPS2 curriculum, or a nutrition and physical exercise curriculum in the comparison group, called Steps To Your Health (STYH). Participants in the STEPS2 experimental group meet with a health educator in one-on-one individually tailored sessions virtually once a week for one hour for 6 weeks. Participants in the STYH comparison group meet with a health educator in small group sessions of 6-10 participants virtually once a week for one hour for 6 weeks. Researchers will compare sexual and reproductive health knowledge and behaviors one year after study enrollment to see if the STEPS2 curriculum is effective at increasing knowledge and healthy behaviors.

Type: Interventional

Start Date: Oct 2023

open study

Obstructive sleep apnea (OSA) is a highly prevalent disorder that is associated with both cardiovascular and metabolic dysfunction, such as hypertension, increased blood glucose levels and diabetes, obesity, and nonalcoholic fatty liver. While continuous positive airway pressure (CPAP), the best available OSA treatment, has been shown to improve blood pressure in OSA, it does not appear to improve metabolic consequences of OSA, and other therapies for OSA-induced dysmetabolism are needed. Animal models of time restricted eating (TRE) demonstrate an improvement in glucose and lipid metabolism, even in the absence of a reduction of caloric intake. Some human studies have shown an improvement in metabolic dysfunction with TRE, though further well-designed studies are needed. The effects of TRE on metabolic dysfunction in patients with OSA, a population with a high predisposition to metabolic disorder, has never been examined. In this study, we will conduct a randomized clinical trial to assess the feasibility and efficacy of 12 weeks of TRE, versus standard eating (SE), to improve glucose regulation and cardiovascular health of participants with OSA.

Type: Interventional

Start Date: Jan 2024

open study

The PRECISION Pain Research Registry enrolls participants with chronic low back pain (cases) and participants who are free of chronic pain (controls) to study the epidemiology and management of chronic pain. The vision of the registry is to conduct research to provide a future for all unbounded by pain.

Type: Observational [Patient Registry]

Start Date: Apr 2016

open study

The Alpha-1 Research Registry is a confidential database made up of individuals diagnosed with Alpha-1 Antitrypsin Deficiency (Alpha-1) and individuals identified as Alpha-1 carriers. The Registry was established to facilitate research initiatives and promote the development of improved treatments and a cure for Alpha-1.

Type: Observational [Patient Registry]

Start Date: Jun 2019

open study

The Vincere Biobank aims to make quality biospecimens and associated clinical data available for research studies related to advancing medicine and improving care for patients, including cancer screening, treatment, and care.

Type: Observational

Start Date: Jul 2023

open study

The hypothesis for this study is that hypofractionated IMRT to 62.5 Gy in 25 fractions (2.5 Gy/fraction) with concurrent carboplatin and paclitaxel, followed by maintenance durvalumab will improve locoregional control at 18 months by 10% compared to standard-fractionated chemo-IMRT/durvalumab. A modest improvement in locoregional control (LRC) was selected as a target which could merit further study of this hypofractionated IMRT regimen in a Phase III trial

Type: Interventional

Start Date: Feb 2022

open study

The objective of this study is to establish the extent to which mesh improves quality of life and surgical outcomes following hernia repair.

Type: Observational [Patient Registry]

Start Date: Oct 2020

open study

Individuals with autism spectrum disorder (ASD) have significantly higher levels of unemployment and underemployment compared to their typically developing peers and all other groups with neurodevelopmental disorders, even though major companies that have employed and trained young people with ASD acclaim their significant innovations in their companies. The investigators hope to examine the effects of specialized employment support programs, over current traditional vocational rehabilitation approaches, for adults with ASD on their ability to maintain steady employment and overall benefit to the organizations at which they will be employed. The investigators predict that Stanford University's Neurodiversity at Work (NaW) Program will improve employment outcomes and positively impact the overall quality of life of individuals with ASD in this program. The investigators hope that the findings of the study will lead to the advancement of programs aimed to support individuals with ASD.

Type: Interventional

Start Date: Sep 2019

open study

The proposed project tests the efficacy of glutamate modulators in non-depressed individuals with alcohol use disorder (AUD); the primary hypothesis is that the glutamate modulator being tested reduces heavy drinking days compared to the active control. It also aims to investigate, using a 2 by 2 factorial (2x2) design, the hypothesis that the effects of the glutamate modulator are enhanced when combined with behavioral treatment.

Type: Interventional

Start Date: Nov 2019

open study

1. To identify biological sex differences in baseline RV function in CTEPH 2. To identify biological sex differences in recovery of RV function after PTE surgery in CTEPH 3. To determine if sex hormone levels relate to RV function at CTEPH diagnosis and during recovery after PTE.

Type: Observational [Patient Registry]

Start Date: May 2022

open study

Subjects implanted with the shoulder replacement medical devices manufactured by FX Shoulder Solutions and distributed by FX Shoulder Solutions.

Type: Observational

Start Date: Dec 2022

open study

Patients undergoing radiation for the treatment of malignancies may suffer from side effects to the skin in the form of radiation dermatitis. This can lead to local wound formation with poor healing. Treatment options for the resulting wound can range from watchful waiting to more aggressive debridement and secondary grafting. Epidermal grafting is a technique in which autologous epidermis is used to cover wounds that are larger than the donor site. Previous studies have demonstrated that this is an effective treatment for different wounds and ulcers but its utility has not yet been evaluated for the treatment of radiation induced injuries. The CelluTome Epidermal Grafting System is a semi automated device that allows easy formation of epidermal Blister. Our study will evaluate the efficacy of epidermal grafts collected using the CelluTome device in the treatment of radiation dermatitis.

Type: Interventional

Start Date: Jan 2021

open study

The purpose of this proposed study is to investigate both the acute and chronic response of frontal plane knee moment after gait retraining and to assess the effects on the biomechanics of the contralateral side. Fifty-one patients diagnosed with tibiofemoral joint osteoarthritis (TFJ OA) will be recruited to participate in the proposed study. Participants will complete baseline trials to assess gait kinematic and kinetic parameters. Following baseline, each participant will perform six conditions of the foot progression gait or three conditions of the trunk lean gait modifications to determine which strategy is most effective in reducing frontal plane knee moment. Participants will then be randomized to either the control or experimental group based on their identified preferred strategy. Participants will complete eight gait retraining sessions using patient-specific gait modifications (tailored foot progression and tailored lateral trunk lean), or normal gait (control) during the training period. A fading feedback design will be implemented. Real-time haptic biofeedback will be provided on every step during the first two weeks and reduced by 25% every subsequent two weeks. No feedback will be provided during baseline and at testing sessions. Measures of pain and function will also be collected at all testing sessions. Variables of interest include ankle, knee, hip sagittal and frontal plane moments. In addition, sagittal and frontal plane impulse will also be assessed. Descriptive statistics will be calculated for foot progression angle, trunk lean angle, frontal and sagittal plane hip, knee, and ankle angles as well as moments. Descriptive statistics for frontal plane knee impulse will also be calculated. A multivariate analysis of variance (MANOVA) will be conducted to compare frontal plane knee moment, frontal plane knee impulse and the absolute sagittal plane moment will be compared across three groups at four different time points. Repeated measures analysis of variance (ANOVA) will be conducted to compare both sagittal and frontal plane joint biomechanics for the contralateral limb. The p-value will be set at .05.

Type: Interventional

Start Date: Oct 2018

open study

The purpose of this cross-sectional, observational study is to evaluate the site and mechanism(s) for expiratory airflow limitation in chronic, treated, current or former smokers (>15 pack years) with COPD, Emphysema, and Asthma-COPD Overlap with mild to severe expiratory airflow limitation. Treatment may include short and long acting inhaled beta2agonists, short and long acting inhaled muscarinic receptor antagonists, inhaled and or oral corticosteroid, oral antibiotic, supplemental oxygen, and PDE type 4 inhibitor. In some cases, the patient may have had a history of asthma preceding the development of COPD (Asthma COPD Overlap).

Type: Observational [Patient Registry]

Start Date: Jan 2017

open study

The purpose of this study is to evaluate the site and mechanisms responsible for expiratory airflow limitation in chronic, treated, non-smoking, stable asthmatics with moderate to severe persistent expiratory airflow obstruction. Treatment will include inhaled corticosteroids and long acting beta2agonists. The investigators are interested in determining whether the large and/or small airways are the predominant site of airflow limitation. The investigators are also interested in determining whether intrinsic small airways obstruction and/or loss of lung elastic recoil is responsible for expiratory airflow limitation. The investigators are also interested to evaluate the role of varying doses of inhaled corticosteroids to suppress large and small airway inflammation using exhaled nitric oxide as surrogate markers of inflammation. For comparison purposes, spirometry and measurements of exhaled nitric oxide will also be obtained if possible during a naturally occurring exacerbation of asthma.

Type: Interventional

Start Date: Oct 2007

open study

The Anti-Aβ mAb CED Study is a prospective, longitudinal coverage with evidence development (CED) study using clinical data, patient assessments, and administrative claims data of the Medicare population, conducted in accordance to the National Coverage Determination (NCD) on Monoclonal Antibodies Directed Against Amyloid for the Treatment of Alzheimer's Disease (AD).

Type: Observational

Start Date: Jul 2023

open study

Prospective, multicenter, single-arm study of the iStent infinite in adult pseudophakic or phakic subjects with mild to moderate primary open angle glaucoma who have not failed conventional medical and surgical treatment

Type: Interventional

Start Date: Sep 2023

open study

The investigators will test the efficacy of our proposed intervention to reduce embodied stress in four racial/ethnic groups (Black, Latinx, Pilipinx, and Pacific Islander) as a preventative intervention for health disparities found in these communities. The intervention is comprised of two phases. The first consists of community nature walks in a pristine redwood forest for six months. This is followed by chosen nature activities with family and/or friends for three months. The investigators will test the ability of these activities in nature to reduce chronic stress that underpins many health disparities using validated biological, behavioral, and sociocultural measures. The use of these measures is in alignment with the National Institute of Minority Health and Health Disparities (NIMHD) Research Framework, and will increase understanding of individual, interpersonal, community, and social level factors that lead to, and that can eliminate health disparities.

Type: Interventional

Start Date: Feb 2023

open study

The purpose of this study is to collect data to develop and evaluate the use of state-of-the-art machine learning approaches within a mobile phone application for the estimation of blood pressure.

Type: Interventional

Start Date: Sep 2023

open study

The purpose of the randomized control trial is to estimate the effect of an oncology clinical nurse specialist-led early intervention multidisciplinary approach to palliative and survivorship care within two previously identified and validated patient groups having metastatic solid tumor malignancy on patient-reported symptom burden, patient-reported overall quality of life (QOL), distress, and overall survival. The primary hypothesis is that the effect of an oncology clinical nurse specialist- led early intervention multidisciplinary palliative and survivorship care model will be significantly higher, as compared to the standard of care approach to palliative and survivorship care, on the primary endpoint of patient-reported symptom burden for patients with metastatic solid tumor malignancy within favorable and very favorable risk groups. Symptom burden includes pain, tiredness, drowsiness, nausea, lack of appetite, depression, anxiety, shortness of breath, and wellbeing.

Type: Interventional

Start Date: Mar 2023

open study

Marfan syndrome (MFS) is a distinctive connective tissue disorder that affects multiple organ systems including the heart, bones, ligaments, and eyes, and is associated with significant risk of aortic dissection. Given limited evidence from in-vitro studies, and theoretical concerns, the majority of patients with MFS are restricted from certain physical activities. The lack of exercise and deconditioning have detrimental effects including increasing weakness, joint pain, decreased endurance, and depressive symptoms. Given the significant paucity of data currently existing on the effects of exercise in humans with MFS, and the recent, optimistic findings in rodent models, this pilot trial was established to assess the effects of moderated dynamic exercise in adolescents and young adults with MFS.

Type: Interventional

Start Date: Sep 2023

open study

The main purpose of this proposal is to perform novel MRI analyses to determine the brain organizational changes associated with altered executive function and the modulating role of variants in neuroresilience and hypoxia response genes in adults with d-transposition of the great arteries (d-TGA).

Type: Interventional

Start Date: Jul 2022

open study

The goal of this randomized treatment study is to formally compare quality of life in patients with at least one pN0 hemi-neck after resection of a squamous cell carcinoma of the oral cavity treated with a primary radiation therapy versus a secondary targeted radiation therapy approach, to provide a high level of evidence to guide the selection of treatment options.

Type: Interventional

Start Date: Sep 2019

open study