Interim analysis of an evaluation of clinical service impact of switching from wire to magnetic seeds for localisation of impalpable breast lesions for surgery.
Association of Breast Surgery ePoster Library. Micha A. 05/13/19; 257092; P048
Ms. Aikaterini Micha
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P048
Topic: Breast surgery
Introduction: Impalpable breast lesions require localisation prior to surgery. There is renewed interest in methods to avoid the logistical constraints of wire localisation which remains the most commonly used technique in the UK. We sought to investigate the impact on our practice of changing to magnetic seed (Magseed) localisation. Methods A prospective service evaluation of consecutive cases was set up with Clinical Research Committee approval. Data were collected on aspects of workflow such as duration of localisation and surgery, causes of delays and the impact on concurrent activities such as the diagnostic clinic. Results: To date, 124 consecutive cases used wire localisation and 62 subsequent cases used Magseeds. Magseed cases had statistically significantly shorter localisation time than wires regardless of whether ultrasound (median = 10 vs 20 minutes, Kruskal Wallis test p=2.9*10-6) or stereotactic localisation was used (12 vs 20 minutes, p=0.01). A greater proportion of Magseed cases were first on the operating list (25.8% vs 15.3%). 19% of the cases of delayed arrival in theatre in the wire cohort were attributed to delay with localisation, compared with zero for Magseeds to date. There was no difference in surgical time for standard wide local excision cases between the two groups. Conclusions: Interim analysis suggests that some of the potential benefits of magnetic seed localisations are being realised, including more rapid throughput in radiology and streamlining of theatre workflow. Full results will be presented in April 2019.
Topic: Breast surgery
Introduction: Impalpable breast lesions require localisation prior to surgery. There is renewed interest in methods to avoid the logistical constraints of wire localisation which remains the most commonly used technique in the UK. We sought to investigate the impact on our practice of changing to magnetic seed (Magseed) localisation. Methods A prospective service evaluation of consecutive cases was set up with Clinical Research Committee approval. Data were collected on aspects of workflow such as duration of localisation and surgery, causes of delays and the impact on concurrent activities such as the diagnostic clinic. Results: To date, 124 consecutive cases used wire localisation and 62 subsequent cases used Magseeds. Magseed cases had statistically significantly shorter localisation time than wires regardless of whether ultrasound (median = 10 vs 20 minutes, Kruskal Wallis test p=2.9*10-6) or stereotactic localisation was used (12 vs 20 minutes, p=0.01). A greater proportion of Magseed cases were first on the operating list (25.8% vs 15.3%). 19% of the cases of delayed arrival in theatre in the wire cohort were attributed to delay with localisation, compared with zero for Magseeds to date. There was no difference in surgical time for standard wide local excision cases between the two groups. Conclusions: Interim analysis suggests that some of the potential benefits of magnetic seed localisations are being realised, including more rapid throughput in radiology and streamlining of theatre workflow. Full results will be presented in April 2019.
P048
Topic: Breast surgery
Introduction: Impalpable breast lesions require localisation prior to surgery. There is renewed interest in methods to avoid the logistical constraints of wire localisation which remains the most commonly used technique in the UK. We sought to investigate the impact on our practice of changing to magnetic seed (Magseed) localisation. Methods A prospective service evaluation of consecutive cases was set up with Clinical Research Committee approval. Data were collected on aspects of workflow such as duration of localisation and surgery, causes of delays and the impact on concurrent activities such as the diagnostic clinic. Results: To date, 124 consecutive cases used wire localisation and 62 subsequent cases used Magseeds. Magseed cases had statistically significantly shorter localisation time than wires regardless of whether ultrasound (median = 10 vs 20 minutes, Kruskal Wallis test p=2.9*10-6) or stereotactic localisation was used (12 vs 20 minutes, p=0.01). A greater proportion of Magseed cases were first on the operating list (25.8% vs 15.3%). 19% of the cases of delayed arrival in theatre in the wire cohort were attributed to delay with localisation, compared with zero for Magseeds to date. There was no difference in surgical time for standard wide local excision cases between the two groups. Conclusions: Interim analysis suggests that some of the potential benefits of magnetic seed localisations are being realised, including more rapid throughput in radiology and streamlining of theatre workflow. Full results will be presented in April 2019.
Topic: Breast surgery
Introduction: Impalpable breast lesions require localisation prior to surgery. There is renewed interest in methods to avoid the logistical constraints of wire localisation which remains the most commonly used technique in the UK. We sought to investigate the impact on our practice of changing to magnetic seed (Magseed) localisation. Methods A prospective service evaluation of consecutive cases was set up with Clinical Research Committee approval. Data were collected on aspects of workflow such as duration of localisation and surgery, causes of delays and the impact on concurrent activities such as the diagnostic clinic. Results: To date, 124 consecutive cases used wire localisation and 62 subsequent cases used Magseeds. Magseed cases had statistically significantly shorter localisation time than wires regardless of whether ultrasound (median = 10 vs 20 minutes, Kruskal Wallis test p=2.9*10-6) or stereotactic localisation was used (12 vs 20 minutes, p=0.01). A greater proportion of Magseed cases were first on the operating list (25.8% vs 15.3%). 19% of the cases of delayed arrival in theatre in the wire cohort were attributed to delay with localisation, compared with zero for Magseeds to date. There was no difference in surgical time for standard wide local excision cases between the two groups. Conclusions: Interim analysis suggests that some of the potential benefits of magnetic seed localisations are being realised, including more rapid throughput in radiology and streamlining of theatre workflow. Full results will be presented in April 2019.
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