Introduction

There are several conditions involving the respiratory tract and trachea some of which are rare conditions. Tracheomalacia is one of the most infrequent conditions of the respiratory tract disorders which this article will discuss in detail. 

The term tracheomalacia describes a condition characterised by a primary irregularity of the tracheal ligament instigating unnecessary collapsibility of the windpipe. In this condition, the ligament in your windpipe is delicate or floppy. Thus, the walls of your windpipe break down or fall in, prompting a scope of several breathing issues. This condition has different types depending upon the degree of the sickness.¹

Anatomy and physiology of the trachea

The trachea is a long tube that on one end connects with the larynx and on the other end connects with the lungs and is commonly called a “windpipe”. It is a vital piece of your respiratory framework. When you breathe in, air goes from your nose or mouth through your larynx towards your windpipe to your bronchi.

Your bronchi convey the air to your lungs.² The windpipe is made up of 16 to 20 C-formed, cartilage rings anteriorly (towards the front of the windpipe) supporting a fibroelastic film posteriorly (towards the back of the windpipe). The tracheal ligament is first identified at the seventh week of incubation and the arrangement of new ligament proceeds centripetally (towards the centre), following the fanning examples of the airway routes, until the baby is around 25 weeks of gestational period.³

The trachea’s principal function is to move air in and out of your lungs. Since it is a solid, adaptable cylinder, it gives a dependable pathway for oxygen to enter your body.²

The windpipe is derived from the undeveloped endoderm. By the third week of the gestational period, the endoderm forms into the foregut. An outpouching of the foregut is created during the fourth week and will lead to all of the directing airway routes.

The windpipe arises from the more proximal ventral foregut endoderm while the throat emerges from the dorsal foregut endoderm. The partition of the two designs is finished by the end of the fourth week. Incomplete foregut division of the windpipe from the throat results in intrinsic irregularities, for example, laryngotracheoesophageal clefts, tracheoesophageal fistula (TOF), and oesophageal atresia (EA) that are ultimately related with tracheomalacia.³

Types of tracheomalacia

• Congenital tracheomalacia: can influence babies, but more commonly occurs in premature babies. It happens when their windpipe doesn't develop as expected during foetal stages.1 It is the most widely recognised intrinsic (birth) deformity influencing the windpipe. Around 1 out of 2,100 kids are brought into the world with the condition²
• Acquired tracheomalacia: even though it is extremely rare , this type of tracheomalacia can happen at whatever stage in life. It happens when your windpipe starts to separate or is disfigured because of an injury, medical procedure or delayed intubation (mechanical relaxing)²

Causes and complications

• Congenital causes: when during birth the cartilage of the trachea is not properly developed. The trachea becomes weak and collapses easily. Also, there are a variety of different conditions, which ultimately become the reason of a weak trachea such conditions include: bronchopulmonary dysplasia and oesophageal atresia etc¹
• Acquired causes: acquired tracheomalacia is caused by the inflammation of different respiratory parts which make the tracheal structure weak. It also happens due to certain injury or long- term mechanical oxygen supply¹
• Complications associated with tracheomalacia: difficulties of untreated tracheomalacia include potential airway route hindrance, repetitive respiratory contaminations, and an inability to thrive. The fundamental goal of treatment is to lessen the probability of fostering these inconveniences; nonetheless, the treatment choices are not without any risks¹

Clinical presentation

Signs and symptoms

The following symptoms commonly appear in tracheomalacia:

• Whooping cough
• Noisy breathing
• The respiratory tract becomes susceptible to infections²
• In severe conditions, the trachea becomes easily collapsed during feeding and crying in infants. Also, dyspnea and cyanosis condition take place¹

Diagnostic evaluation

For the diagnosis of tracheomalacia, different tests should be done after the proper physical examination and the evaluation of symptoms. Such tests are as followed:¹

• Fluoroscopy with contrast: give the data regarding the extent to which the trachea collapsed
• Sometimes bronchoscopy or trachea bronchography is also used for diagnostic purposes, which gives an idea about the shape, size and overall appearance of the lumen
• Multidetector Computed Tomography: This procedure is done with contrast by which diagnostic accuracy is achieved
• Magnetic Resonance Imaging: It is also very useful in the assessment of tracheomalacia and its novel approaches become a better solution as no radiation or anaesthetic exposure is needed
• Pulmonary Function Test: Provide supportive data for the better diagnosis of tracheomalacia¹

Differential diagnosis

Healthcare providers also consider other conditions during diagnosis as they represent similar symptoms as tracheomalacia. These conditions are as follows:¹

• Laryngomalacia
• Paralysis of vocal cords
• Epiglottitis
• Subglottic stenosis
• Foreign body inhalation

Management and treatment

Contingent upon the degree of the sickness and other related conditions, tracheomalacia can be dealt with safely, with clinical administration, or with medical procedures.¹

Conservative management

• Lifestyle modifications: medical services colleagues ought to exhort guardians on fitting inoculations, immunisations, and uninvolved smoking aversion.¹ Chest physiotherapy might be important to help the administration of discharges and forestall airway route diseases. Also, closer monitoring infants on and use of humidified air, consistent positive airway route pressure (CPAP) is beneficial⁴
• Medications: in some circumstances clinicians use bronchodilators, hostile to muscarinic specialists, mucolytics, and anti-infection agents¹

Surgical interventions

Tracheostomy

An opening that specialists make through the front of the neck into the windpipe. A tracheostomy tube is put into the opening to keep it open for relaxing. The expression for the surgical procedure to make this opening is known as a tracheotomy. A tracheostomy gives an air section to assist you with breathing when the standard course for breathing is somehow obstructed or decreased.⁵

Tracheal stenting

In this, there is a placement of stent in your windpipe. This limited cylinder holds the windpipe open and urges the tissues to develop around it. Stenting is a possibility for extremely serious conditions. Even though the silicone stents might be more straightforward to eliminate, they require an overall sedative and inclusion through unbending bronchoscopy. Albeit frequently patients experience momentary improvement of side effects from stenting, the extension in life span of the goal of side effects is still not confirmed.^1,6

Aortopexy

aortopexy is a careful way to deal with tracheomalacia and a lean toward choice in many focuses. The methodology gives a foremost lifting of the aorta that is stitched to the back surface of the sternum.¹

Healthcare teams involved in tracheomalacia

• Contingent upon illness, seriousness and pathology, patients with tracheomalacia may require input from an assortment of interprofessional colleagues
• Physiotherapists might be required to peform chest physiotherapy to help with discharges and lessen respiratory contaminations
• Discourse and language specialists, alongside dieticians, can give an evaluation of taking care of and sustenance to guarantee satisfactory development and improvement is made in kids
• Cardiothoracic and otorhinolaryngology specialists might be expected to direct further careful intercession assuming moderate administration falls flat
• Anesthesiologists might be expected to get the airway route also they assist during diagnostic procedures

All of the above will work with determination and empower proper references to diminish postpones in treatment.¹

FAQs

What is the difference between primary and secondary tracheomalacia?

Primary tracheomalacia occurs by birth in which the trachea is undeveloped and can spread to other parts. On the other hand, Secondary tracheomalacia is localised and takes place due to damage to the trachea because of injury or trauma.

Does tracheomalacia improve on its own?

Infants with tracheomalacia frequently have a functioning trachea over the initial two years of life. However, children with extreme tracheomalacia, or individuals who gained the condition further down the road, may require treatment.

Summary

From a wide range of respiratory disorders, one of the rare conditions is tracheomalacia in which the trachea is severely weakened resulting in collapse and the patient facing breathing issues. This condition is further divided into two types, one is congenital tracheomalacia in which develops during the gestational period resulting in the trachea not being properly developed. The second type is acquired tracheomalacia, in which a patient faces this condition at any age due to a trauma or injury.

There are also several conditions which become the cause of the development of such conditions. In this, the patient suffers from stridor, hoarseness, difficulty breathing, more encounters with infections of the respiratory tract, cyanosis and a whooping cough. For the diagnosis of tracheomalacia, a number of procedures are considered such as a computed tomography scan, magnetic resonance imaging, a chest X-ray, bronchoscopy, fluoroscopy and pulmonary function tests, which help to evaluate the extent of the tracheal damage.

To manage this condition healthcare providers first move towards lifestyle changes such as avoiding smoking, the use of humidifiers and chest physiotherapy along with prescribing some medications such as bronchodilators, mucolytics and antibiotics to prevent the condition. If the condition shows no improvement and becomes adverse the doctor should suggest a surgical procedure such as tracheostomy, placement of a stent and aortopexy. From the initial step of evaluating the condition to the management of tracheomalacia, a number of healthcare specialists are involved to provide a better treatment plan to the patient.