The short answers

What is preserved: The bridge line, not the whole nosePreservation means keeping the dorsum's own contour and lowering it from below. It does not mean a smaller operation elsewhere in the nose.
Comparative evidence: No meta-analysis of superiorityWe looked for pooled evidence that preservation outperforms structural technique on any outcome, and did not find it among the sources this site cites.
Procedure duration: Typically 1.5 to 3 hoursNHS figure for nose reshaping generally. ENT UK quotes 2 to 5 hours where the septum is corrected as well. No figure we found is specific to preservation.
Anaesthesia: Usually general anaesthesiaBoth the NHS and ENT UK describe nasal reshaping as normally performed with the patient asleep.
Splint removal: Around day 5 to 10The NHS describes a splint taped over the nose for 7 days, kept dry until removal. ENT UK allows a week or two.
Further surgery to adjust the shape: About 5 to 10 in 100ENT UK figure for rhinoplasty generally. One cohort of 175,842 patients recorded 3.1 percent, and reference material quotes up to 15 percent.

Preservation rhinoplasty is not one operation. It is a group of techniques that keep what other approaches remove: the dorsal line, the soft tissue envelope, and tip cartilage sutured rather than cut away.

The difference is clearest at the hump. A structural reduction opens the roof of the nose, so the middle third must be rebuilt. Preservation lowers the whole dorsum from below and leaves that roof closed.

What is actually being preserved

Two dorsal manoeuvres are commonly described. In one, the bridge is pushed down into the nasal cavity. In the other, bone is removed at the base and the dorsum let down onto it.

Dorsal preservation. The bridge line is kept and lowered as one piece, so there is no open roof to reconstruct.
Soft tissue preservation. Dissection is planned to leave the covering layers and their attachments as intact as possible.
Tip preservation. Shape, projection and rotation are altered mainly by suturing cartilage. Removing too much is a recognised cause of later pinching and breathing difficulty.

Skin thickness limits all three. CT in 190 patients put the soft tissue at 2.1 mm over the bridge and 3.1 mm at the tip. It was thickest just above the tip, at 4.8 mm.

Men measured thicker at every site, and thick skin holds swelling longer.

What the published evidence does and does not show

Preservation is marketed as gentler surgery, with quicker settling and a dorsum that never had to be rebuilt. Those are claims about outcomes, and outcomes are measurable.

No meta-analysis in this page's source set establishes that preservation is superior to structural technique on any outcome. That is a statement about the literature rather than about the technique: the comparison has not been settled either way.

The comparison that has been pooled is a different one: a 2025 systematic review and meta-analysis of 12 studies and 1,067 patients, comparing open with closed access.

It found no significant difference in aesthetic outcome, breathing, swelling, bruising, operative time, satisfaction or complications, and advised tailoring the choice to the anatomy and the surgeon.

That review says nothing about preservation

It is quoted here to show what a settled comparison looks like: pooled patients, and a conclusion that outlives one surgeon's series. Preservation does not yet have one.

The operation itself

Surgery is normally performed under general anaesthesia. The NHS gives 1.5 to 3 hours for nose reshaping. ENT UK quotes 2 to 5 hours where the septum is corrected as well.

The NHS advises 1 or 2 nights in hospital, while ENT UK notes that some cases are managed as a day case.

Preservation manages the dorsum. It is not an alternative to open or closed access and can be performed through either, which are compared separately.

The instruments are a separate question. Ultrasonic rhinoplasty has its own page, where the pooled evidence is thicker than it is here.

Recovery, and when the shape can be judged

Swelling does not peak on day one. Three dimensional measurement puts maximum nasal volume at 7 to 14 days, roughly when the splint comes off.

Days 1 to 7The splint stays on and dry. Sleep propped up, do not blow your nose, and sneeze with your mouth open.
Days 5 to 10Splints come off. The American Academy of Facial Plastic and Reconstructive Surgery gives 5 to 8 days for sutures.
Weeks 2 to 6Bruising can last up to 3 weeks. Swimming at about 3 weeks, strenuous exercise and glasses off the bridge at 4 to 6 weeks.
Months 1 to 12One study of 40 patients recorded about two thirds of the swelling gone by 1 month. In the same study, 95 percent had gone by 6 months. It recorded 97.5 percent by a year.

Those swelling figures come from a study of 40 primary open rhinoplasty patients, so they describe conventional surgery, not preservation. The day by day guide covers each stage.

Limits, revision, and the question that matters more

A preserved dorsum is still a dorsum that has been operated on. Published figures for further surgery range from about 3 percent to 15 percent, depending on how revision is defined.

In a cohort of 175,842 patients followed at least three years, 3.1 percent of primary cases had a revision. The median interval before that revision was 1.2 years. ENT UK states 5 to 10 people in 100.

Revision is normally considered only after twelve months, because operating on swollen tissue risks correcting swelling that would have settled.

The label matters less than the surgeon

Preservation is a technique rather than a qualification. Ask which approach the surgeon proposes for your bridge and why that one, and ask before you travel. Our doctors answer questions sent through the site.

Questions to ask a surgeon

Take these to a consultation. The consultation checklist is built to be printed and written on, and our doctors will answer questions sent through the site before you travel.

Which parts are you preserving: the dorsum, the soft tissue, the tip, or all three?
How many preservation cases have you performed, and over how many years?
What would make you choose a structural reduction for my nose instead?
No pooled evidence we could find shows preservation is superior. On what basis are you recommending it?
If the dorsum does not settle where you planned it, what is the correction, and who pays for it?
Is my septum being corrected at the same time, and does that change the technique?

Sources

Every source below was opened and checked. We link to health authorities, peer-reviewed journals and professional bodies, and to nothing else.

RhinoplastyStatPearls, NCBI Bookshelf (National Library of Medicine)Peer-reviewed clinical reference covering anatomy, technique selection and complications.
Outcomes of open versus closed rhinoplasty: a systematic review and meta-analysisPlastic and Reconstructive Surgery Global Open, via PubMedPooled evidence comparing the two approaches, rather than one surgeon's preference.
Nose reshaping (rhinoplasty)NHS, United KingdomNational health authority overview of what the operation involves, recovery and risks.