What is Septoplasty?

The nasal septum is the wall of cartilage and bone that divides the nose into two passages. When it is crooked or shifted to one side (a "deviated septum"), it can block airflow through one or both nostrils.

Many people notice this during the day, but the effect on breathing is often worse during sleep. Think of drinking a supersized Coke through a thin paper straw. You have to pull hard, and the straw starts to flatten. Now picture bubble tea through a wide plastic straw, where even the boba come up with little effort. When the nose is obstructed, the body works harder to pull air through a narrower space. This can contribute to snoring and sleep apnea.

Septoplasty for patients

Septoplasty straightens the deviated portions of the septum to improve airflow. In practice, "straightening" means removing the pieces of cartilage and bone that block the nasal passage, where it is safe to do so. A frame of cartilage along the top and front of the septum is always kept to support the nose. The surgery is done entirely through the nostrils. There are no incisions on the outside of the nose, and septoplasty is not meant to change how the nose looks.

Dr. Liu often combines septoplasty with reduction of the inferior turbinates (the tissue ridges inside the nose) to achieve the best result. For patients whose narrow palate contributes to nasal obstruction, maxillary expansion (DOME) may also be discussed.

The goal is to restore comfortable nasal breathing, especially during sleep.

Septoplasty video for patients

Septoplasty, explained for patients

A short video for patients about septoplasty. Press play to watch it here, or open it on YouTube.

Watch on YouTube ›

Septoplasty for referring physicians

The internal nasal valve (INV) is comprised of the septum, inferior turbinates, caudal edge of the upper lateral cartilages, and the bony nasal floor. The INV can account for up to 50% of total upper airway resistance. In patients with sleep-disordered breathing, even modest nasal obstruction increases the negative inspiratory pressure that promotes pharyngeal collapse during sleep.

Septoplasty addresses deviations of the quadrangular cartilage, vomer, and maxillary crest components that contribute to INV narrowing. Critical septal support structures, particularly the dorsal and caudal L-strut, are preserved to maintain nasal integrity.

In our practice, septoplasty is frequently performed in conjunction with inferior turbinate reduction (radiofrequency ablation with outfracture) and, when indicated, nasal valve repair or piriformplasty. For patients with transverse maxillary hypoplasia contributing to a narrow nasal floor, distraction osteogenesis maxillary expansion (DOME) offers an adjunctive approach to widen the INV at its skeletal foundation.

Correction of nasal obstruction has been shown to improve sleep quality and enhance adherence to positive airway pressure therapy. It also serves as a foundational intervention within the updated Stanford Sleep Surgery Algorithm, which integrates site-directed nasal, palatal, tongue base, neurostimulation, and skeletal procedures based on individual patient phenotyping.

Cone beam CT coronal slices through the front of the nose before and after DOME. Panels A and B show the internal nasal valve angle widening from 12.2 to about 15 degrees on each side. Panels C and D show the valve area increasing from about 70 to about 110 square millimeters.
Internal nasal valve angle (A, B) and area (C, D) on cone beam CT, before and after DOME. In 32 DOME patients, the valve angle and area increased on both sides, and a wider angle matched better nasal breathing (NOSE) scores. Read the paper ›

Related Research by Dr. Liu

Hidden septal deviation is common in sleep apnea

In 274 patients seen at the Stanford sleep surgery clinic, about 1 in 5 had a deviation at the back of the septum that a routine look inside the nose would miss. A nasal endoscope found something that changed the treatment plan in about 1 in 4 (26.6%). Endoscopy is recommended for anyone with nasal blockage or trouble tolerating CPAP, and it is part of every evaluation in the Stanford sleep surgery protocol.

When septoplasty is not enough, the cause may be the width of the nasal floor (the roof of the palate)

In 89 adults treated for nasal obstruction, those who stayed blocked after septoplasty, turbinate, valve or sinus surgery had a narrower upper jaw (18.4 vs 20.3 mm) and a higher arched palate (8.0 vs 6.6 mm). Soft tissue surgery does not widen bone. These patients may be candidates for maxillary expansion.

DOME after septoplasty improves nasal breathing

In a feasibility study of 32 patients who were still blocked after septoplasty and had a narrow, high-arched palate, DOME cut nasal obstruction (NOSE) scores by more than half, from 13.6 to 5.2, and widened the nasal floor from 22.4 to 28.1 mm. There were no major complications.