Clinical Trials

The purpose of this study is to:

• Collect fat/liposuction aspirate from plastic surgery procedures for research.

The purpose of this study is to learn whether there are differences in the outcome between placing the tissue expander above or below the chest muscle in women having immediate breast reconstruction following a mastectomy  The study will evaluate pain, wellbeing, and overall satisfaction with reconstruction. A secondary purpose is to learn whether there are differences in complications and costs between the two locations.

The purpose of this study is to assess the best 2-year overall survival when comparing fluorouracil, irinotecan hydrochloride, and oxaliplatin (combination chemotherapy) to gemcitabine hydrochloride and nab-paclitaxel, given before surgery for treating patients who have pancreatic cancer that can be removed by surgery. Drugs used in chemotherapy, such as fluorouracil, irinotecan hydrochloride, oxaliplatin, gemcitabine hydrochloride, and nab-paclitaxel, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Giving more than one drug (combination chemotherapy) may kill more tumor cells. It is not yet known whether combination chemotherapy is more effective than gemcitabine hydrochloride and nab-paclitaxel before surgery for treating pancreatic cancer.

The ourpose of this study is to Investigate the effectiveness of acellular human nerve allografts in decreasing sensory deficits following peripheral nerve biopsy.   

The purpose of this study is to assess the impact of pre-procedural venous mapping prior to botox/filler injection on post-procedural contusion, hematoma, and patient satisfaction.

The purpose of this study is to evaluate the safety and effectiveness of the Mentor MemoryGel® larger size ultra high profile breast implants for patients who are undergoing primary or revision reconstruction surgery.

The purpose of this study is to provide a comprehensive review of Mayo Clinic’s experience with different arthroplasty procedures to address basilar thumb arthritis.

The primary purpose of this study is to identify the therapeutic effect of Adipose-Induced Regeneration (AIR) in radiation-induced skin injury of post-mastectomy breast cancer patients.

The purpose of this study is to assess postoperative pain in patients who received pudendal block with quantitative outcomes charted in medical records such as total amount of analgesics received, intraoperative vitals, number of days till mobile, and patient reported pain scale.

Each year, the number of breast cancer survivors who choose post-mastectomy breast reconstruction keeps rising. Among women who elect to pursue breast reconstruction, approximately 75% will choose prosthetic breast reconstruction. Implant-based breast reconstruction is frequently achieved in two-stages. The first stage consists of the placement of a tissue expander after mastectomy. This is followed by a period of weekly tissue expansions that can last several months. In the second stage, the tissue expander is removed in a surgical procedure and replaced with a permanent breast implant. Tissue expansion is a well-established breast reconstruction technique characterized by high success rates and high patient satisfaction. Despite the well-recognized advantages of this successful breast reconstruction technique, the subpectoral placement of a tissue expander is associated with significant pain and discomfort in the immediate post-operative period and during the phase of tissue expansion. Pectoralis major muscle spasm is a frequently reported problem during tissue expansion. Legeby et al. recently showed that women who underwent prosthetic breast reconstruction had higher pain scores and took more analgesics that those who did not choose post-mastectomy reconstruction.

In the past 10 years, publications on the use of BTX-A for pain relief in a wide array of clinical conditions have increased tremendously. BTX-A is one of the neurotoxins produced by Clostridium botulinum bacteria. By reversibly inhibiting neurotransmitter release, BTX-A has both analgesic and paralytic properties. The analgesic action of BTX-A was initially thought to be related to its effects on muscular contraction. However, a recent in vitro study of embryonic rat dorsal neurons did confirm that BTX-A inhibits release of substance P, a neurotransmitter associated with pain and inflammatory reactions. The presence of analgesic properties of BTX-A is increasingly supported by several clinical observations: pain relief with BTX-A injections has been reported for migraine headaches, chronic pelvic, chronic tennis elbow, and post-operative pain control for lower limb lengthening correction, among others.

This aspect has never been studied in breast cancer survivors who elect to pursue breast reconstruction with tissue expanders. Furthermore, physical function outcomes are important to consider with BTX-A use because the link between temporary muscle paralysis and improvements in participation in daily activities is not a given.

The investigators propose to complete a double-blinded prospective randomized controlled trial of women undergoing unilateral and bilateral mastectomies with immediate placement of tissue expanders, to establish the efficacy and safety of BTX-A in alleviating pain and in improving physical well-being during the expansion period.