Diastasis Recti: How Abdominal Muscle Separation Is Assessed and When Repair Is Considered

Diastasis recti is the separation of the two halves of the rectus abdominis muscle along the midline of the abdomen. It is common after pregnancy and after significant weight change, and it is one of the more misunderstood reasons people look into abdominal surgery. Abdominal muscle separation is a structural change rather than a matter of muscle tone, which is why it does not respond to abdominal exercise the way many people expect. This article outlines how it is assessed, what is tried first, and when repair may be discussed as part of abdominoplasty in Sydney.

What Is Diastasis Recti?

The rectus abdominis runs vertically down the front of the abdomen in two halves, joined at the midline by a band of connective tissue called the linea alba. When that band stretches and thins, the two muscle halves move apart. The muscles themselves are usually intact. What has changed is the tissue holding them together.

A visible ridge or doming along the midline when sitting up from lying down is a common sign. It is distinct from a hernia, in which abdominal contents push through an actual defect in the wall, though the two can occur together and are assessed together.

Why Abdominal Muscle Separation Happens

Pregnancy

Pregnancy is the most common cause. The growing uterus stretches the linea alba progressively, and hormonal changes increase tissue laxity. Some degree of separation is present in most people late in pregnancy, and it resolves on its own in many cases over the months following birth. Where it persists beyond that period it is less likely to close without intervention. How pregnancy affects abdominal surgery outcomes more broadly is covered in this article on how pregnancy can affect abdominoplasty results.

Significant weight change

Sustained increases in abdominal volume, whether from weight gain or from repeated fluctuation, place the same kind of load on the midline tissue. Abdominal muscle separation from this cause is seen in men as well as women.

Other contributors

Repeated heavy lifting with poor technique, chronic straining and some connective tissue conditions can contribute. In many patients the cause is a combination.

How Diastasis Recti Is Assessed

Physical examination

Assessment begins with examination. The patient is usually asked to lie flat and then partially sit up, which contracts the rectus muscles and makes any separation and midline doming apparent. The width of the gap is felt at several levels: above the navel, at the navel and below it, because separation is often not uniform along its length.

Measuring the width

The gap is measured in finger widths or centimetres, though width alone does not determine whether repair is appropriate. The quality and tension of the remaining midline tissue matters as much as the measurement, and so does whether the patient has symptoms.

Imaging

Imaging is required where a Medicare item number is being sought, and ultrasound is the usual form. It is also arranged where a hernia is suspected, where examination findings are unclear, or where previous abdominal surgery complicates the picture, to clarify what is present before a surgical plan is discussed.

Symptoms, not just appearance

Assessment also covers function. Lower back pain, a sense of core weakness, difficulty with certain movements and in some cases urinary symptoms are recorded. These influence whether the condition is being treated as a functional problem or an aesthetic one, which in turn affects funding. Where a Medicare item number is being sought, these symptoms should be listed in the referral from the general practitioner. A consultation for abdominoplasty in Sydney therefore begins with examination and history rather than with a discussion of technique.

Conservative Management Comes First

Targeted physiotherapy is the usual first step and is worth pursuing properly before surgery is considered. A physiotherapist experienced in abdominal and pelvic floor rehabilitation can improve core control, reduce symptoms and in milder cases narrow the separation. Physiotherapy is arranged through a general practitioner or directly with a practitioner working in that field. A documented course is also required to qualify for the relevant Medicare item number, and patients are asked to obtain a letter from their physiotherapist or equivalent practitioner confirming it.

Conservative management does not restore stretched connective tissue to its original state. A wide separation that persists after a genuine course of rehabilitation is unlikely to close with further exercise alone.

When Diastasis Recti Surgery Is Considered

Repair is generally discussed where the separation is persistent, has not responded to conservative management, and is causing symptoms or functional limitation rather than appearance concerns alone. Completion of childbearing is normally expected first, since a later pregnancy can undo a repair.

Weight stability is also assessed. Diastasis recti surgery performed while weight is still changing is less likely to hold, for the same reason the separation developed.

How Abdominal Muscle Repair Is Performed

Repair is carried out as part of an abdominoplasty. The technique, described as plication, involves bringing the two edges of the rectus sheath back together in the midline with internal sutures, which re-establishes the midline and narrows the waist from the inside. Muscle repair is done through the same incision used to remove excess skin, so most patients having abdominoplasty in Sydney have it done at the same time as skin removal rather than as a separate operation.

How much excess skin also needs removing is determined at examination. Some patients need muscle repair with minimal skin removal and others need both. Liposuction is sometimes used alongside to refine contour where localised fat remains, though it plays no part in the muscle repair itself.

Where a hernia is identified alongside the separation, it is a different problem requiring a different repair. It can often be addressed during the same operation, with a general surgeon carrying out the hernia repair while the plastic surgeon performs the abdominoplasty.

Funding and Medicare

Specific Medicare item numbers exist for repair of abdominal muscle separation in defined clinical circumstances, and eligibility is assessed case by case against the criteria that apply. It depends on documented symptoms and examination findings rather than the patient’s own assessment. The related position is set out in this article on Medicare rebates for abdominoplasty. Confirm eligibility directly with the surgeon’s rooms and with Medicare.

Risks and Considerations

Abdominoplasty with muscle repair carries the general risks of surgery and anaesthesia along with procedure-specific risks. These include fluid collection under the skin, bleeding, infection, wound healing problems or wound separation, blood clots, altered or reduced sensation across the abdomen, asymmetry, a permanent scar, tightness and discomfort during early recovery, and recurrence of the separation. Further surgery is sometimes required.

Results vary between individuals and cannot be guaranteed. A referral is required before proceeding, and a cooling-off period applies between consultation and the decision to proceed. Suitability can only be determined through an individual consultation with a Registered Specialist Plastic Surgeon.

What to Discuss at Consultation

Useful areas to raise include how wide the separation is and at which levels, whether a hernia has been excluded, what conservative management is recommended first, whether symptoms are documented, how much skin removal is proposed alongside repair, and what lifting restrictions to plan for.

Pure Aesthetics consults from two locations: Sydney City (Level 6, 149 Macquarie Street, Sydney NSW 2000) and Macquarie University (Suite 302, 2 Technology Place, Macquarie University NSW 2109). Individual results vary, all surgery carries risks, and a second opinion should be sought before proceeding.

Frequently Asked Questions

Can diastasis recti close without surgery?

In some cases, particularly in the months after pregnancy and where the separation is mild. Targeted physiotherapy can improve symptoms and core control, and may narrow a smaller gap. A wide separation that persists after a proper course of rehabilitation is unlikely to close with exercise alone.

Will abdominal exercise fix abdominal muscle separation?

Not on its own, and some exercises can make the midline doming more pronounced. The change is in the connective tissue joining the muscles, not in the muscles themselves. Guidance from a physiotherapist experienced in this area is more useful than general core work.

Is diastasis recti the same as a hernia?

No. In diastasis recti the abdominal wall is stretched and thinned but intact. In a hernia there is an actual defect through which tissue can protrude. They can occur together, which is one reason examination and sometimes imaging are used to distinguish them before surgery is planned.

Does Medicare cover repair of muscle separation?

Item numbers exist for defined clinical circumstances, and eligibility is assessed individually against those criteria. Documented symptoms, examination findings and a referral all form part of that assessment. Eligibility should be confirmed with the surgeon’s rooms and with Medicare rather than assumed.

Should I wait until I have finished having children?

This is generally recommended. A later pregnancy places the same load on a repaired midline that caused the original separation, and can undo the repair. Where a Medicare item number is being sought, the most recent pregnancy must have been at least 12 months prior. Timing is discussed individually at consultation.

Further Reading

• Abdominoplasty Sydney: pureaesthetics.com.au/procedures/body/tummy-tuck-sydney-nsw/