Broad-Spectrum Antibiotics for Breast Expander/Implant Infection: Treatment-Related Adverse Events and Outcomes.

BACKGROUND: Despite best practices, infection remains the most common complication after breast reconstruction with expanders and implants, ranging from 2% to 29%. Empiric broad-spectrum antibiotics are frequently used in nonsurgical treatment of implant-associated infections in an effort to salvage the reconstruction. Pitfalls of antibiotherapy include adverse events, vascular access site complications, and drug resistance. Our goals were to describe management of implant infections with broad-spectrum antibiotics, review treatment related adverse events, and report on outcomes of therapy. PATIENTS AND METHODS: A retrospective review was carried out to identify patients who were treated with intravenous (IV) antibiotics for periprosthetic infection. Patient characteristics, surgical details, and antibiotic therapy-related adverse events were collected. Eventual outcome related to expander/implant salvage was noted. RESULTS: A total of 101 patients (111 treatment episodes) were identified. Mean duration of antibiotic treatment was 18 days (range, 1-40 days). The most commonly used parenteral treatment was a combination of daptomycin with piperacillin-tazobactam (65%) or an alternative agent (16%). Fifty-nine percent of treatment episodes resulted in salvage of the expander or implant. Thirty-five percent treatment episodes were associated with 1 or more adverse events: diarrhea (12.6%), rash (10%), vaginal candidiasis (3.6%), agranulocytosis/neutropenic fever (3.6%), nausea (3.6%), urinary complaint (0.9%), myositis (0.9%), headache (0.9%), vascular line occlusion (1.8%), deep vein thrombosis (1.8%), and finger numbness (0.9%). No patients developed Clostridium difficile colitis. Five episodes (4%) needed discontinuation of antibiotics because of severe adverse events. The prosthesis was explanted in 3 of the cases of discontinued treatment. CONCLUSIONS: Our findings show favorable outcomes and well-tolerated adverse effects with broad-spectrum parenteral antibiotherapy for periprosthetic infection. However, every effort should be made to deescalate therapy by narrowing the spectrum or limiting the duration, to minimize adverse events and development of bacterial resistance. Treating surgeons need to carefully weigh benefits of therapy and be aware of potential complications that might necessitate discontinuation of treatment.

Management of Expander- and Implant-Associated Infections in Breast Reconstruction.

BACKGROUND: Periprosthetic infection remains the most common complication after implant-based breast reconstruction. Objectives of the study were to (1) describe our clinical approach and treatment protocol for managing patients with suspected periprosthetic infection, (2) identify the microorganisms causing periprosthetic infections at our institute, and (3) report on outcomes of implant salvage versus explantation. METHODS: A retrospective chart review of patients who were treated with parenteral antibiotics for periprosthetic infection was carried out. Patient characteristics, clinical and laboratory findings, outcomes, treatment modalities and complications were extracted from electronic medical records. Data were compared between patients whose implants were salvaged versus explanted. RESULTS: Fifty-nine patients with 67 tissue expander (TE)/implants underwent parenteral antibiotic treatment for suspected infection. Thirty-three (49%) of the TE/implants were salvaged. Mean follow-up was 14.3 months. The most commonly cultured organisms were P. aeruginosa followed by S. epidermidis. All suspected infections were treated with broad spectrum parenteral antibiotics with MRSA coverage. The most common combination was daptomycin 6 mg/kg combined with Zosyn 4.5 g. Explantations were significantly more common in patients with history of chemotherapy (p = 0.03), hypertension (p = 0.04) and those who underwent therapeutic mastectomy (p = 0.04). CONCLUSION: Risk factors for explantation due to postoperative periprosthetic infections following TE/implant-based breast reconstruction include chemotherapy, hypertension and therapeutic mastectomy. Prompt diagnosis and effective treatment of periprosthetic infection, particularly in these high-risk patients, are imperative to salvage the breast reconstruction. Gram-negative bacteria are increasingly found in breast implant infections and should be covered when employing empiric antibiotherapy. LEVEL OF EVIDENCE IV: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

Expander/Implant Removal After Breast Reconstruction: Analysis of Risk Factors and Timeline.

INTRODUCTION: Removal of tissue expanders (TE) or implants is a dire consequence of breast reconstruction, and has the potential to halt the reconstructive efforts. Our goals were to characterize a cohort of patients with TE/implant removal, to perform a time-based analysis, and to review the bacteriology associated with explanted devices. MATERIALS AND METHODS: Review of a prospectively maintained database was performed to identify patients who underwent TE/implant removal. Patient characteristics, surgical technique, adjuvant therapies, indications, complications, culture results were obtained. Data were analyzed according to timing of explantation. RESULTS: A total of 55 TE and implants were removed in 43 patients. Reasons for explantation were infection (58%), patient request (22%), and wound-related complications (20%). The majority of explantations occurred after 30 days (62%), and after Stage I (81%). Median days to explantation was 62. Patients of older age (p = 0.01) and higher BMI (p = 0.02) were more likely to undergo explantation after Stage I. The most commonly cultured organisms were S. epidermidis (10.9%), S. aureus (10.9%) and P. aeruginosa (10.9%). Antibiotic resistance was commonly encountered for ampicillin, cefazolin, penicillin, and erythromycin. CONCLUSION: Infection is the most common reason for explantation after prosthetic breast reconstruction. Patients should be carefully monitored for a prolonged period of time after Stage I, as the majority of explantations occur in this stage but beyond 30 days. For oral treatment, fluoroquinolones and trimethoprim-sulfamethoxazole and for IV treatment a combination of vancomycin or daptomycin with piperacillin-tazobactam or imipenems/carbapenems appear to be appropriate choices according to our culture results. LEVEL OF EVIDENCE IV: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

An Analysis of Current Techniques Used for Intraoperative Flap Evaluation.

BACKGROUND: Over the last decade, microsurgeons have used a greater variety of more complex flaps. At the same time, microsurgeons have also become more interested in technology, such as indocyanine green (ICG) angiography, dynamic infrared thermography (DIRT), and photospectrometry, for preoperative planning and postoperative monitoring. These technologies are now migrating into the operating room, and are used to optimize flap design and to identify areas of hypoperfusion or problems with the anastomoses. Although relatively more has been published about ICG angiography, information is generally lacking about the intraoperative role of these techniques. METHODS: A systematic analysis of articles discussing intraoperative ICG angiography, DIRT, and photospectrometry was performed to better define the sensitivity, specificity, expected outcomes, and potential complications associated with these techniques. RESULTS: For intraoperative ICG angiography, the sensitivity was 90.9% (95% CI: 77.5-100) and the accuracy was 98.6% (95% CI: 97.6-99.7). The sensitivity of DIRT was 33% (95% CI: 11.3-64.6), the specificity was 100% (95% CI: 84.9-100), and the accuracy was 80% (95% CI: 71.2-89.7). The sensitivity of intraoperative photospectrometry was 92% (95% CI: 72.4-98.6), the specificity was 100% (95% CI: 98.8-100), and the accuracy was also 100% (95% CI: 98.7-100). CONCLUSION: These technologies for intraoperative perfusion assessment have the potential to provide objective data that may improve decisions about flap design and the quality of microvascular anastomoses. However, more work is needed to clearly document their value.

Predicting skin flap viability using a new intraoperative tissue oximetry sensor: a feasibility study in pigs.

BACKGROUND: Operations for soft-tissue reconstruction, orthopedic, vascular, and other types of surgery can be complicated by unexpected skin flap necrosis. At present, surgeons utilize subjective clinical judgment and physical findings to estimate the potential for tissue compromise. As the validity of these subjective methods is questionable, there is a need for objective, quantitative tools to determine the risk of flap necrosis during surgery. METHODS: Three 9-month-old Yorkshire pigs were used for the study. Four laterally based random pattern fasciocutaneous flaps were dissected on each animal. After the flaps were elevated, a prototype oximeter (ViOptix Inc., Fremont, CA), was used to measure tissue oxygenation (StO2) at 2 cm intervals along the flaps. Measurements were performed immediately after the flaps were dissected, and again at the same points after they were sutured. The animals were reevaluated 4 days later, and assessed for areas of tissue necrosis. RESULTS: For each flap, StO2 at the base was compared with StO2 at the more distal points. The median delta StO2, as measured immediately after dissection, was -3.9% points for tissue that remained viable and -34.0% points for tissue that became necrotic (p = 0.039). After the flaps were sutured back to the chest wall, the median delta StO2 for tissue that remained viable was -1.7% points versus -24.7% points for tissue that became necrotic (p = 0.006). CONCLUSIONS: This new handheld surface sensor can be used to measure StO2 of skin flaps and may potentially reduce complications associated with unexpected tissue necrosis.

A prospective analysis of free flap monitoring techniques: physical examination, external Doppler, implantable Doppler, and tissue oximetry.

No universally accepted method of flap monitoring exists, and several techniques are in use. Repeated physical examination is most popular and is often supplemented with a handheld, external Doppler, and/or implantable Doppler probes; near-infrared spectroscopy is less commonly used. We investigated the nursing and resident house staff's experience and confidence with physical exam for flap monitoring. Also, a consecutive series of 38 patients with free flaps were monitored using physical examination, external Doppler, implantable arterial and venous Doppler probes, and near-infrared spectroscopy. Five patients developed signs of microvascular complications within 3 days of surgery; all were explored and salvaged. Neither the residents nor the nursing staff were universally trained or experienced in flap monitoring by physical exam. In all patients, changes in the appearance of the flap suggestive of a microvascular complication lagged 30 to 60 minutes after the adjunctive monitoring methods indicated that a problem had occurred. Near-infrared spectroscopy was the first warning sign in four of the five patients. Two patients were explored before thrombosis of the anastomoses occurred. Near-infrared spectroscopy may identify early microvascular complications more reliably than physical examination, external Doppler, or implantable Doppler.

A prospective randomized trial comparing subatmospheric wound therapy with a sealed gauze dressing and the standard vacuum-assisted closure device.

OBJECTIVE: Two methods of subatmospheric pressure wound therapy--wall suction applied to a sealed gauze dressing (GSUC) and the vacuum-assisted closure device (VAC)--were compared in hospitalized patients at University of Chicago Medical Center. SUMMARY OF BACKGROUND DATA: VAC therapy is widely used, but can be expensive and difficult to apply; it also fails in some patients. METHODS: A randomized prospective study of 87 patients (N = 45 in the GSUC arm and N = 42 in the VAC arm) was undertaken between October 2006 and May 2008. The study comprised patients with acute wounds resulting from trauma, dehiscence, or surgery. RESULTS: Demographics and wound characteristics were similar in both groups. There were significant reductions in wound surface area and volume in each group. In the GSUC group, the reductions in wound surface area and volume were 4.5%/day and 8.4%/day, respectively (P < 0.001 for both), and in the VAC group, this was 4.9%/day and 9.8%/day, respectively (P < 0.001 for both). The reductions in wound surface area and volume were similar in both groups (P = 0.60 and 0.19, respectively, for the group-by-time interaction). The estimated difference (VAC - GSUC) was 0.4% (95% confidence interval: -1.0, 1.7) for wound surface area and 1.4% (95% confidence interval: -0.7, 3.5) for volume. The mean cost per day for GSUC therapy was $4.22 versus $96.51 for VAC therapy (P < 0.01) and the average time required for a GSUC dressing change was 19 minutes versus 31 minutes for a VAC dressing change (P < 0.01). The sum of pain intensity differences was 0.50 in the GSUC group compared with 1.73 for the VAC group (P = 0.02). CONCLUSIONS: GSUC is noninferior to VAC with respect to changes in wound volume and surface area in an acute care setting. In addition, GSUC dressings were easier to apply, less expensive, and less painful.

Microsurgery in the hypercoagulable patient: review of the literature.

Improved techniques in microvascular surgery over the last several decades have led to the increased use of free tissue transfers as a mode of reconstructing difficult problems with a high success rate. However, undiagnosed thrombophilias have been associated with microsurgery free flap failures. We present a case of successful free tissue transfer in a patient with lupus anticoagulant and review the literature.

Plastic Surgery Reconstruction of Sarcoma Resection Defects: Form and Function.

Surgical wide resection is the mainstay of treatment of sarcomas, but the advent of multimodality therapy has improved outcomes and the rates of limb-sparing resection. Often, wounds are unable to be closed primarily and require plastic surgical reconstruction. Following adequate oncologic resection, reconstruction should focus on maintaining functional and esthetic outcomes with minimal postoperative complications. Reconstruction methods range from simple techniques such as skin grafting and local rotational flaps all the way to more complex procedures such as free flaps. The reconstructive surgeon is an integral member of the multidisciplinary team and should be actively involved in treatment planning.

Bilateral immediate two-stage breast reconstruction in patients with unilateral breast cancer: Outcomes analysis and risk assessment.

INTRODUCTION: Contralateral prophylactic mastectomy has the potential to decrease the occurrence of cancer and reduce psychological burden. However, it is known that complications after bilateral mastectomy are higher compared with unilateral mastectomy. Our goal was to evaluate outcomes of immediate breast reconstruction in patients undergoing bilateral mastectomy and to compare complication rates between therapeutic and prophylactic sides. PATIENTS AND METHODS: Electronic medical records of patients with unilateral breast cancer who underwent bilateral mastectomy and immediate reconstruction with expanders were reviewed. Postoperative complications were compared between therapeutic and prophylactic mastectomy sides. RESULTS: Sixty-two patients were analyzed. The overall complication rate after both stages was 23.9% on the therapeutic side and 16.5% on the prophylactic side. Infection was the most common complication on both sides. All infections on the prophylactic mastectomy side were successfully treated with intravenous (IV) antibiotics (salvage rate of 100%), whereas 35.7% of infected tissue expander/implants on the therapeutic mastectomy side were explanted despite treatment. CONCLUSION: Careful counselling of patients undergoing elective contralateral prophylactic mastectomy is essential as complications can develop in either breast after reconstruction.

Near-total human face transplantation for a severely disfigured patient in the USA.

BACKGROUND: Multiple reconstructive procedures are common for the reconstruction of complex facial deformities of skin, soft tissues, bony structures, and functional subunits, such as the nose, lips, and eyelids. However, the results have been unsatisfactory. An innovative approach entailing a single surgical procedure of face allograft transplantation is a viable alternative and gives improved results. METHODS: On Dec 9, 2008, a 45-year-old woman with a history of severe midface trauma underwent near-total face transplantation in which 80% of her face was replaced with a tailored composite tissue allograft. We addressed issues of immunosuppressive therapy, psychological and ethical outcomes, and re-integration of the patient into society. FINDINGS: After the operation, the patient did well physically and psychologically, and tolerated immunosuppression without any major complication. Routine biopsy on day 47 after transplantation showed rejection of graft mucosa; however, a single bolus of corticosteroids reversed rejection. During the first 3 weeks after transplantation, the patient accepted her new face; 6 months after surgery, the functional outcome has been excellent. In contrast to her status before transplantation, the patient can now breathe through her nose, smell, taste, speak intelligibly, eat solid foods, and drink from a cup. INTERPRETATION: We show the feasibility of reconstruction of severely disfigured patients in a single surgical procedure using composite face allotransplantation. Therefore, this should be taken in consideration as an early option for severely disfigured patients. FUNDING: None.

Metachronous giant brachial artery pseudoaneurysms: a case report and review of the literature.

Brachial artery pseudoaneurysms secondary to intravenous drug abuse represent a limb-threatening problem to patients and a technical challenge to the vascular surgeon. Here information is reported about a patient with metachronous bilateral giant brachial artery pseudoaneurysms secondary to intravenous drug use that were successfully treated with excision of the aneurysm and ligation of the brachial artery. Furthermore, a review of the current literature on the treatment of brachial artery aneurysm is presented.

Free vascularized lymph node transfer for treatment of lymphedema: A systematic evidence based review.

BACKGROUND: Free vascularized lymph node transfer (VLNT) is a relatively novel technique for treatment of lymphedema. The purpose of this systematic review was to evaluate the current evidence on VLNT and to determine if there is objective data concerning improved outcomes. METHODS: A literature search of PubMed, EMBASE and CENTRAL electronic databases was conducted to identify articles written in the English language on VLNT for treatment of lymphedema. Publications were selected according to inclusion criteria. Papers reporting adjunct techniques and those that did not describe outcomes were excluded. Data including patient demographics, surgical technique, complications and outcomes were extracted. A quality score was calculated for each article. RESULTS: Eighteen studies were included with an overall study population of 305 patients. Mean quality score of articles was 5.3 with levels of evidence range from II to IV. Among 182 patients who underwent limb circumference assessment, 165 (91%) showed postoperative improvement. Reduction of limb volume was noted in 98 of 114 (86%) patients. Ninety two patients underwent lymphoscintigraphy/lymphangiography and 55 (60%) demonstrated moderate or significant improvement of flow. Patient satisfaction was questioned in 105 patients and with exception of 7 patients, all reported a high satisfaction level with significant relief in symptoms and improved quality of life. Publications also reported a reduction in infectious episodes. CONCLUSION: VLNT appears to provide improvement in lymphedema. More studies with standardized methods for reporting outcomes and uniform patient selection are needed to evaluate this technique thoroughly.

Advances in pediatric liver transplantation: continuous monitoring of portal venous and hepatic artery flow with an implantable Doppler probe.

BACKGROUND: Acute vascular thrombosis is a dreaded complication in solid organ transplantation. Pediatric liver transplantation is associated with a high incidence of hepatic artery thrombosis. Graft salvage is dependent upon early recognition and correction of the thrombosis. Current methods of surveillance for vascular thrombosis lack early detection. METHODS: Four consecutive pediatric liver transplantations were performed using the implantable Doppler probe to monitor the patency of the hepatic artery and the portal vein during the early postoperative period. RESULTS: The implantable Doppler probes provided reliable monitoring of vascular patency. Early detection of hepatic artery thrombosis, with subsequent correction and graft salvage, was achieved with the use of the implantable Doppler probe. CONCLUSIONS: The implantable Doppler probe provides real-time surveillance of vascular patency for up to 7 days in the postoperative period. Signal quality and character was easily assessed by physician and nursing staff and reliably reflected intravascular flow.

Primary sternal plating in high-risk patients prevents mediastinitis.

OBJECTIVE: Sternal wound infection leading to post-operative mediastinitis is a devastating complication of cardiac surgery carrying nearly a 15% mortality rate despite current treatment methods. Instability of bone fragments pre-disposes a patient to have non-union, mal-union and can subsequently lead to deep sternal wound infections progressing to mediastinitis. Rigid plate fixation has been utilized for acquired and surgically created fractures of virtually every bone in the body to prevent instability. However, the current standard for sternotomy closure remains the method of wire-circlage. Application of rigid plate fixation for sternal osteotomies affords greater stability of the sternum. We report on our preliminary experience with this technique in high-risk patients. METHODS: From July of 2000 to December 2001, rigid plate fixation was applied to 45 patients designated as having high risk for sternal dehiscence and subsequent mediastinitis. High risk was defined as patients having 3 or more established historical risk factors, including: COPD, Re-Operative Surgery, Renal Failure, Diabetes, Chronic Steroid Use, Morbid Obesity, Concurrent Infection and Acquired or Iatrogenic Immunosuppression. Intra-operative risk factors included off-midline sternotomy, osteoporosis, long cardio-pulmonary bypass runs (>2 h), transverse fractures of the sternum. Rigid plate fixation was performed using a combination of plates secured by bi-cortical screws, after the cardiac surgical procedure was complete and hemostasis was secured. RESULTS: Rigid plate fixation was performed on 26 males and 19 females. The average age of patients was 63 (43-88) years. The average follow-up was 15 weeks (range 8-41 weeks). While there were 4 peri-operative deaths unrelated to sternal closure: one from aspiration pneumonia (post-operative day 9), one from a pulmonary embolus (post-operative day 29), one from overwhelming sepsis from pre-existing endocarditis (post-operative day 15), and one for primary respiratory failure (post-operative day 12). All others healed successfully. One patient who had a sterile dehiscence subsequently underwent successful re-operative rigid fixation. Comparing the cohort of patients who received rigid plate fixation to a matched population of high-risk patients during a similar time period who received wire closure, revealed a significant difference in the incidence of post-operative mediastinitis. The wire closed group (n = 207) had 18 deaths unrelated to sternal closure and had 28 patients who developed mediastinitis (14.8%). The rigid plate fixation group had no mediastinitis (Fisher's exact test, P = 0.006). The total incidence of post-operative mediastinitis during the designated study period was 4.2%. CONCLUSION: Patients who benefited from sternal closure with rigid plate fixation showed a significant decrease in the incidence of post-operative mediastinitis when compared to similar population of patients whose sterna were closed with wire.

Vacuum assisted closure for the treatment of sternal wounds: the bridge between débridement and definitive closure.

A method to refine the treatment of sternal wounds using Vacuum Assisted Closure (V.A.C.) therapy as the bridge between débridement and delayed definitive closure is described. A retrospective review of 35 consecutive patients with sternal wound complications over a 2-year period (March of 1999 to March of 2001) was performed. The treatment of sternal wounds with traditional twice-a-day dressing changes was compared with the treatment with the wound V.A.C. device. An analysis of the number of days between initial débridement and closure, number of dressing changes, number and types of flaps needed for reconstruction, and complications was performed. Eighteen patients were treated with traditional twice-a-day dressing changes and 17 patients were treated with V.A.C. therapy alone. The two groups were similar regarding age, sex, type of cardiac procedure, and type of sternal wound. The V.A.C. therapy group had a trend toward a shorter interval between débridement and closure, with a mean of 6.2 days, whereas the dressing change group had mean of 8.5 days. The V.A.C. therapy group had a significantly lower number of dressing changes, with a mean of three, whereas the twice-a-day dressing change group had a mean of 17 (p < 0.05). Reconstruction required an average of 1.5 soft-tissue flaps per patient treated with traditional dressing changes versus 0.9 soft-tissue flaps per patient for those treated with V.A.C. therapy (p < 0.05). Before closure, there was one death among patients undergoing dressing changes and three in the V.A.C. therapy group, all of which were unrelated to the management of the sternal wound. Patients with sternal wounds who have benefited from V.A.C. therapy alone have a significant decrease in the number of dressing changes and number of soft-tissue flaps needed for closure. Finally, the V.A.C. therapy group had a trend toward a decreased number of days between débridement and closure.

A prospective randomized trial comparing subatmospheric wound therapy with a sealed gauze dressing and the standard vacuum-assisted closure device: a supplementary subgroup analysis of infected wounds.

INTRODUCTION: Subatmospheric pressure wound therapy (SAWT) is commonly used to manage infected wounds. However, this practice remains controversial because the safety and efficacy of the technique has not been carefully documented. METHODS: The authors assessed the safety and efficacy of a sealed gauze dressing with wall suction applied (GSUC) compared to vacuum assisted-closure (VAC), both soaked with topical antimicrobials. Subjects included 31 hospitalized patients with acutely infected wounds compared with 56 patients with noninfected wounds. RESULTS: There were significant reductions in wound surface area and volume in both infected and noninfected groups; there was no significant difference in the rate of change observed in the GSUC vs the VAC arms of the study. In the infected group, the reduction in wound surface area was 4.4% per day for GSUC and 4.8% per day for VAC. Wound volume was 7.8% per day for GSUC, and 9.7% per day for VAC (P < 0.001 for all). Evidence of wound infection in all patients, regardless of treatment group, resolved by 96 hours of onset of treatment, and there were no complications specifically related to the use of a sealed dressing over infected wounds. CONCLUSION: Gauze dressing with wall suction and VAC therapy can be used in selected acute, infected wounds and both methods of treatment appear to be similarly effective for reducing wound surface area and volume. .

Considerations surrounding reconstruction after resection of musculoskeletal sarcomas.

The defects left by resection of bone and soft-tissue sarcomas often require reconstructive surgery to provide adequate wound coverage, preserve limb function, and optimize cosmetic results. Immediate reconstruction should always be considered after resection with a negative margin, and should be attempted whenever possible. The choice of reconstructive method and tissue flap depends on multiple factors, including body site, donor site morbidity, functional requirements, size of the vascular pedicle, and aesthetics. Preoperative planning before the resection should anticipate the defect size and resulting functional and cosmetic deficits; the success of such planning depends on a collaborative approach between the teams performing the primary resection and the reconstruction. Vigilant postoperative care and flap monitoring is key to avoiding flap or graft failure, hematoma, infection, and other reconstruction-related complications.