An interventional study of immediate acellular dermal matrix-assisted implant-based breast reconstruction with prepectoral implant placement. and Immediate acellular dermal matrix-assisted implant-based breast reconstruction with subpectoral implant placement in Mastectomy and Breast Cancer, sponsored by Ottawa Hospital Research Institute. Status unknown at 1 site in Canada. Open to female participants aged 20 Years to 80 Years. Per ClinicalTrials.gov, last updated 2022-04-27.
Sponsored by Ottawa Hospital Research Institute · Not applicable, Interventional, and Treatment
Despite the popularity and proved safety of prepectoral implant-based reconstruction, there is little evidence on long-term results and variables which could influence surgical outcome. So far, no specific guidelines or indications have been developed for prepectoral technique and heterogeneous inclusion criteria had been used in previous reports. There is a lack of studies documenting outcomes following ADM-assisted prepectoral breast reconstruction, and there are no randomised controlled trial studies that drawing a direct comparison of clinical or patient-reported outcomes between subpectoral and prepectoral groups.
The investigators hypothesized that immediate acellular dermal matrix-assisted implant-based breast reconstruction with prepectoral implant placement would result in less early postoperative pain but more reported implant rippling, requirement of more fat grafting and an equitable safety profile compared with ADM-assisted implant-based breast reconstruction with subpectoral implant placement.
The aim of this study is to evaluate the postsurgical pain, complications and patient-reported outcomes of prepectoral breast reconstruction versus subpectoral implant placement in immediate breast reconstruction.
The investigators will employ a single centre RCT with duration of two years (July 1, 2019 - June 30, 2021). Participant recruitment and enrolment will occur at the Women's Health Center for 1 year (July 1, 2019 to June 30, 2020), followed by one year (June 30, 2021) of follow-up data collection, data analyses and dissemination.
At the preoperative consultation, the surgeon will determine if the patient is eligible for implant-based immediate reconstruction, using the inclusion and exclusion criteria.
A total of 56 patients or 23 patients per arm will be recruited. Randomization will be accomplished using randomly permuted blocks, and the randomization list will be prepared by a biostatistician with no clinical involvement in this trial. Randomization will be stratified on the basis of center and laterality of reconstruction (i.e., unilateral versus bilateral reconstruction).
The allocation sequence will be concealed by placing each randomization assignment in a sequentially numbered, opaque, sealed envelope. Consecutive envelopes will be delivered to the operating room by the on-site research study assistant once the mastectomy is complete. To prevent subversion of the allocation sequence, envelopes will not be opened until the attending surgeon confirms the absence of significant mastectomy flap necrosis and the fact that the patient does not undergo a concurrent axillary lymph node dissection.
All patients will be blinded to their treatment arm. Once the treatment arm is revealed, the attending surgeon will advise the surgical team (surgical assistants and operating room nurses) the surgical plan. While the surgical team will be aware of the randomization code, the rest of the postoperative care team (including recovery room staff, day surgery nursing staff, and clinic staff during follow-up visit), outcome assessors, and data analysts will be kept blinded to the intervention performed.
Outcome measures:
At the baseline visit, following informed consent, demographic data (age, BMI, laterality and comorbidities) will be collected. The participant will then complete the following questionnaires: Pre-operative Breast-Q™: The Breast-Q™ Reconstruction Module is a validated PRO developed specifically for patients undergoing breast reconstruction. The questionnaire evaluates patient-reported satisfaction, psychosocial, physical and sexual quality of life [1] Primary outcome: Postoperative Pain scores and 24-hour narcotic consumption Secondary outcomes: All outcomes are measured within or at 12 months of the initial surgery.
Ottawa Hospital Research Institute is the lead sponsor of 538 studies on the registry; 100 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
Immediate acellular dermal matrix-assisted implant-based breast reconstruction with prepectoral implant placement.
Procedure: immediate acellular dermal matrix-assisted implant-based breast reconstruction with prepectoral implant placement.
Immediate acellular dermal matrix-assisted implant-based breast reconstruction with subpectoral implant placement.
Procedure: Immediate acellular dermal matrix-assisted implant-based breast reconstruction with subpectoral implant placement
On the day of surgery, after the completion of the mastectomy, the vascularity of the mastectomy flaps will be evaluated, and debridement is performed where necessary. A temporary implant sizer is placed in the pocket to assess the position and shape of the prepectoral pocket. The pocket is adjusted where necessary. A sheet of ADM (DermAcell) is then selected. The DermAcell will be prepared as per the manufacture's instructions and fenestrated using size 11 blade. The DermACELL piece will be trimmed to the appropriate shape and sutured to the superior medial and lateral edges of the pectoralis major muscle. The inferior edge will be sutured to the fascia at the level of the inframammary fold. Two closed suction drains will be placed (one below the mastectomy skin flap, and one below DermACELL). The implant will be inserted to the pre-pectoral pocket and several anchor sutures will be used to secure the superior-medial edge of DermACELL to mastectomy flap.
On the day of surgery, after the completion of the mastectomy, the vascularity of the mastectomy flaps will be evaluated, and debridement is performed where necessary. The reconstructive operative procedure will then proceeded with (1) elevation of the pectoralis major muscle with release of inferior attachments; (2) placement of implant subpectorally; (3) placement and suturing of DermACELL to constitute the inferolateral breast pocket; (4) placement of two closed suction drains (one superiorly between the pectoralis major and skin, and one inferiorly between the DermACELL and skin); (5) removal of sizer and placement of permanent to the pocket and (6) suture the inferior edge of DermACELL to the inferior edge of the pectoral major muscle. The skin will be closed and the dressing will be applied as standard protocol.
Postoperative Pain and 24-hour narcotic consumption
Postoperative Pain will be scored using Numerical rating scale. The scale ranges from 0 to 10 indicating the level of pain. Zero indicates the absence of pain, while 10 represents the most intense pain (no pain = 0, mild = 1-3, moderate = 4-6, severe = 7-10).
Time frame: 24 hours
Mastectomy flap necrosis
Skin loss of mastectomy flap
Time frame: 4 weeks
Rate of seroma
Episodes of seroma formation requiring aspiration
Time frame: 4 weeks
Rate of infection
Cellulitis and abscess
Time frame: 3 months
Rate of Explantation
Loss of implant
Time frame: 1 year
Number of Revisional surgeries
return to operating room for more surgeries
Time frame: 1 year
Rate of Wound
incision dehiscence or debridement
Time frame: 3 months
Rate of Capsular contracture
Tightening, firmness and pain of reconstructive breast
Time frame: 1 year
BREAST-Q© Pre-operative scale
The BREAST-Q© modules is comprised of the following two overarching themes (or domains): 1) Health-Related Quality of Life (QOL) and 2) Patient Satisfaction. Under each of these domains, there are six subthemes; QOL: 1) Psychosocial, 2) Physical and 3) Sexual well-being; and Patient Satisfaction: 4) Satisfaction with Breasts, 5) Satisfaction with Outcome and 6) Satisfaction with Care. Body image is an important concept for breast surgery patients. Preoperative scales: Satisfaction with Breasts, Psychosocial, Sexual and Physical Well-being Chest There is no overall or total BREAST-Q© score, only scores for each independent scale. All BREAST-Q© scales are transformed into scores that range from 0-100. The scores are computed by adding the response items together and then converting the raw sum scale score to a score from 0-100. For all BREAST-Q© scales, a higher score means greater satisfaction or better QOL (depending on the scale). The score is from 0 (worst) to 100 (best).
Time frame: Before Surgery
BREAST-Q© Post-operative
The BREAST-Q© modules is comprised of the following two overarching themes (or domains): 1) Health-Related Quality of Life (QOL) and 2) Patient Satisfaction. Under each of these domains, there are six subthemes; QOL: 1) Psychosocial, 2) Physical and 3) Sexual well-being; and Patient Satisfaction: 4) Satisfaction with Breasts, 5) Satisfaction with Outcome and 6) Satisfaction with Care. Body image is an important concept for breast surgery patients. Postoperative scales: Satisfaction with Doctor, Medical Team and Office Staff There is no overall or total BREAST-Q© score, only scores for each independent scale. All BREAST-Q© scales are transformed into scores that range from 0-100. The scores are computed by adding the response items together and then converting the raw sum scale score to a score from 0-100. For all BREAST-Q© scales, a higher score means greater satisfaction or better QOL (depending on the scale). The score is from 0 (worst) to 100 (best).
Time frame: 3 months and 12 months
Plan to share: No
No publications or documents are linked to this record.
This study is status unknown, as verified in Apr 2022. You cannot join it, but the record below documents what was studied.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
Ottawa Hospital Research Institute