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  • Routine antibiotics...

Routine antibiotics don't improve outcomes of post-mastectomy breast reconstruction

Written By : Dr. Kamal Kant Kohli Published On 2023-08-01T09:30:53+05:30  |  Updated On 1 Aug 2023 12:52 PM IST
Routine antibiotics dont improve outcomes of post-mastectomy breast reconstruction
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For breast cancer patients undergoing breast reconstruction after mastectomy, avoiding postoperative oral antibiotics does not reduce the risk of infections, reports a study in the May issue of Plastic and Reconstructive Surgery®, the official medical journal of the American Society of Plastic Surgeons (ASPS). The journal is published in the Lippincott portfolio by Wolters Kluwer.

"Our experience suggests that discontinuing routine oral antibiotic treatment after implant-based breast reconstruction does not lead to an increase in surgical site infections, and will eliminate a small but significant risk of allergy and other antibiotic-related complications," comments ASPS Member Surgeon Mark Sisco, MD, of NorthShore University HealthSystem, Evanston, Ill.

No increase in infections after policy change on preventive antibiotics

A growing number of breast cancer patients are undergoing breast reconstruction after mastectomy, particularly immediate reconstruction using implants. Surgical site infections (SSIs) occur in 10% to 25% of patients undergoing this procedure, leading to increased rates of hospital readmission, repeat surgery, and reconstructive failure.

Historically, plastic surgeons have given extended antibiotic prophylaxis (EAP) to reduce the risk of SSI. The use of postoperative oral antibiotics has continued despite a lack of evidence for its effectiveness, and amid rising concerns about antibiotic resistance. In 2016, the authors' health system joined the growing trend toward ending routine EAP for post-mastectomy breast reconstruction.

To evaluate the impact of this practice change, Dr. Sisco and colleagues compared outcomes in two groups of patients: 654 women (1,004 breasts) receiving EAP and 423 women (683 breasts) not receiving postoperative oral antibiotics. Both groups received a single dose of intravenous antibiotic before surgery.

After surgery, the overall infection rate was similar between groups: 7.9% with EAP and 9.1% without EAP. After adjustment for differences in patient characteristics, the risk of SSIs was not significantly different between groups. This was even though patients in the non-EAP were more likely to receive some newer techniques – including nipple-sparing mastectomy and pre-pectoral ("above the muscle") implant placement – thought to carry an increased risk of complications.

'Thousands of women nationwide' may have adverse reactions to EAP

Meanwhile, patients receiving EAP had some "infrequent but not insignificant" adverse events, including a two percent rate of moderate to severe allergic reactions. At least four women in the EAP group developed infection with antibiotic-resistant Clostridium difficile ("C-diff") bacteria. Neither of these complications occurred in patients who did not receive extended antibiotics.

There was also evidence that EAP affected the types of bacteria isolated from patients who developed infections, including a higher rate of gram-negative bacteria. Extended antibiotic use was associated with a "broader range of pathogens" and more frequent need for second-line intravenous antibiotics.

"Although the use of EAP does not appear to worsen clinical outcomes, marked differences in the microbiology of associated infections may make them more difficult to treat," Dr. Sisco and coauthors write. Especially at a time when breast reconstruction rates are rapidly increasing, "Our findings suggest that thousands of women are having adverse reactions to EAP nationwide, and some of these are likely to be serious," the researchers add.

While acknowledging some important limitations of their study, the authors note that a definitive randomized trial of ending routine EAP is unlikely to be performed. Dr. Sisco and colleagues conclude, "We hope that our experience will give surgeons additional evidence and courage to change their practice."

Reference:

Sisco, Mark; Kuchta, Kristine; Alva, Duanny; Seth, Akhil K. Oral Antibiotics Do Not Prevent Infection or Implant Loss after Immediate Prosthetic Breast Reconstruction. Plastic and Reconstructive Surgery 151(5):p 730e-738e, May 2023. | DOI: 10.1097/PRS.0000000000010073

Plastic and Reconstructive SurgeryAmerican Society of Plastic Surgeonsantibioticssurgical site infectionsbreast cancer
Source : Plastic and Reconstructive Surgery
Dr. Kamal Kant Kohli
Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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