Студопедия
Случайная страница | ТОМ-1 | ТОМ-2 | ТОМ-3
АрхитектураБиологияГеографияДругоеИностранные языки
ИнформатикаИсторияКультураЛитератураМатематика
МедицинаМеханикаОбразованиеОхрана трудаПедагогика
ПолитикаПравоПрограммированиеПсихологияРелигия
СоциологияСпортСтроительствоФизикаФилософия
ФинансыХимияЭкологияЭкономикаЭлектроника

Lecture 1kursk state medical university 14 страница



may well mask the underlying bony deformity, and if there is initial doubt about

whether surgical manipulation is necessary, patients should be examined again

after this interval. Radiography should be carried out. Both a lateral and an

anteroposterior view should be taken. In a lateral X-ray it can be difficult to

differentiate between an undisplaced fracture of the nasal tip and the vascular

markings on a normal nasal bone, hence the importance of taking an

anteroposterior view as well. It can also be difficult to ascertain whether the

fracture line is new, or related to a previous injury.

Clinical examination. In looking for a deviated fracture of the nasal bones, the

examiner should stand behind the patient with the latter's head thrown back,

when asymmetry is more easily demonstrated. The patient's profile should also be

examined for evidence of depression or hump formation. Anterior rhinoscopy

should be carried out to ascertain the patency of the airways and to note any

damage to the septum such as dislocation, haematoma or abscess formation. As

nasal injuries may be associated with facial fractures, the eyes should be

routinely examined for diplopia, the orbital rim palpated for step deformity,

and sensation tested over the area of skin supplied by the infra-orbital nerve.

Palpation of the nasal bones themselves should be done very gently, and pain

will be evoked, if a fracture is present, up to 3 weeks from the original

injury.

Treatment. Treatment of fractured nasal bones with cosmetic deformity is

manipulation. This can be done immediately, before the swelling occurs, as on

the sports field, when firm pressure may be enough to reduce the fracture. The

next optimum period for manipulation is about 10 days after the injury, when the

soft-tissue swelling will have resolved, but the nasal bones are still mobile.

After 3 weeks, the callus formation is sufficient to make manipulation

impossible, and the patient should be reviewed in 6 month, when, if active

treatment is still required, a formal rhinoplasty is carried out.

The nasal bones are disimpacted and manipulated with special forceps, and, of

equal importance, an attempt should be made to reposition the septal cartilage

in the midline. If there is instability in the corrected position, a plaster of

Paris cast or tin splint should be applied for a period of 10 days. Anterior

nasal packing is introduced.

Epistaxis associated with nasal injures is usually short-lived and settles with

simple pressure. Occasionally it may be troublesome and recurrent, especially if

there is an associated fracture of the ethmoidal area.

If the fracture is compound to the skin, the wound should be cleaned and

sutured, and the patient given systemic antibiotics and antitetanus prophylaxis.

 

Nasal septal haematoma and abscess

 

A haematoma of the nasal septum may be secondary to trauma or may follow septal

surgery. The blood collects in the subperichondrial layers and is bilateral.

This results in a smooth firm swelling of the septum causing bilateral nasal

obstruction. Infection frequently supervenes, and an abscess occurs. This is

associated with considerable pain in the region of the nasal tip, which becomes

excruciating on manipulation of the nose. If an abscess forms the patient

complains of headache and fever.

A septal haematoma should be evacuated with an adequate incision on both sides

of the cartilage, and removal of all blood clot. The nose is thereafter packed

for 24 hours to prevent reaccumulation of blood. If an abscess is encountered,

incisions are again made on both sides of the septum, the pus is removed and a

drain is stitched to the incision to aid drainage and to prevent premature

closure of the incision. The appropriate systemic antibiotic is also given. As

the perichondrial layer carries the blood supply to the cartilage, in a

proportion of cases a septal abscess results in resorption of the quadrilateral

(septal) cartilage and a saddle deformity of the nose develops with a

perforation of the nasal septum.

 

LARYNX TRAUMATOLOGY

 

The function of the larynx may be affected by vocal abuse, intubation injury,



external trauma, chemical toxins, and foreign bodies.

The symptoms are dictated by the abnormal laryngeal function and include voice

disorders, respiratory obstruction, coughing, and surgical emphysema of the

neck.

The appropriate endoscopic and radiologic procedures must be used to diagnose

and localize the lesion.

 

Vocal Abuse

 

Acute

 

Symptoms. These include dysphonia, or even aphonia, and pain on speaking.

Pathogenesis. This is caused by extreme overuse of the voice in sporting

spectators, politicians, market traders, and disco habitues.

Diagnosis. Indirect or direct laryngoscopy which shows hyperemia or swelling of

the vocal cords and subepithelial bleeding.

Treatment. Strict voice rest and inhalations are required. If polyps form, they

are removed by microlaryngoscopy.

 

Chronic

 

Symptoms. The voice is hoarse and croaking or disappears under stress. Singing

is difficult or impossible.

Pathogenesis. Screamer's or singer's nodules develop because of chronic overuse

or misuse of the voice.

Screamer's nodules occur in children and are frequent in mothers of large

families and in teachers who must talk a lot.

Singer's nodes are due to unsatisfactory singing technique.

Diagnosis. Direct or indirect laryngoscopy shows the nodules on the typical site

at the junction between the anterior and middle thirds of the vocal cords which

is the point of maximal amplitude of the vibrations of the vocal cords. They are

usually bilateral.

Treatment. Once the nodules progress beyond a certain size, they become

fibrotic, and voice rest and speech therapy are no longer successful. Most

patients then require endolaryngeal microsurgery with postoperative speech

therapy.

 

Intubation Injury

Acute

 

Symptoms. Immediately or shortly after removal of the tube the patient complains

of dysphonia, attacks of coughing, and hemoptysis. He also has a pain in the

larynx and neck.

Pathogenesis. Injury is caused by repeated or incorrect intubation, intermittent

positive pressure respiration, a protruding guide wire, a wrong-sized tube,

insufficient relaxation, overextension, and pressure of the tube cuff. These

factors lead to a myogenic or neurologic paralysis. Drying of the mucosa due to

the premedication facilitates mucosal injury. Laryngeal complications may be

expected in adults after less than 48 h of intubation, whereas in young children

the average time interval for the onset of mucosal injuries is between 3 and 7

days.

Diagnosis. Laryngoscopy shows a subepithelial hematoma, superficial and deep

mucosal injuries, and rarely a tear of the vocal cord or subluxation of the

arytenoid cartilage.

Treatment. A hematoma or a superficial mucosal lesion can heal spontaneously

within a few days. Pressure paralysis of the recurrent laryngeal nerve is also

capable of spontaneous resolution, but tears of the vocal cord or subluxation of

the arytenoid cartilage require surgery.

 

Chronic

 

Symptoms. Dysphonia or laryngeal dyspnea develop 2 or 8 weeks after intubation

anesthesia or prolonged intubation.

Pathogenesis. Incorrect intubation, a tube that is too large or too rigid,

incorrect (endolaryngeal or subglottic) position of the cuff, or prolonged

intubation can all cause damage. The general condition of the patient including

factors such as shock, retching, and vomiting are additional factors.

The early lesions including endolaryngeal or subglottic hyperemia and edema,

ischemic mucosal defects with fibrinous membrane, necrosis and ulceration lead

to late injures. The latter include ulceration, perichondritis, cartilaginous

necrosis, synechiae, and strictures.

Diagnosis. This is made by laryngoscopy, tomography, and pulmonary function

studies. An intubation granuloma is usually bilateral and lies on the vocal

process, vocal cords, mucosa of the subglottic space.

Treatment. Granulomas are removed by endolaryngeal microsurgery or laser.

Postoperative speech therapy is indicated, but there is a tendency for

recurrence.

 

External Trauma

 

Blunt and penetrating injuries, and open and closed injuries, occur and must be

diagnosed.

Symptoms. These include immediate or increasing dyspnea, even complete

respiratory obstruction due to hematoma, edema, and dislocation of cartilage

fragments, bleeding, and dysphonia. Dysphagia and pain occur when the esophagus

is affected.

Pathogenesis. These injuries are particularly common in traffic accidents,

especially due to impact with the steering wheel and dashboard. Other causes

include athletic injuries, Karate blows. fighting, and attempting strangulation.

In addition to the direct trauma resulting in subluxation and disruption of the

laryngeal framework, the blow may force the larynx against the vertebral column

causing endolaryngeal mucosal tears and vertical, horizontal, or combined

fractures. Subluxation of the larynx from the trachea can occur. Perforations or

contusions in the neighboring hypopharynx and upper esophagus lead to

tracheoesophageal or laryngoesophageal fistulas. The neighboring nerves and

vessels may also be injured.

Diagnosis. Inspection, palpation, and laryngoscopy demonstrate fractures,

crepitation, or displacement of laryngeal fragments and surgical emphysema of

the neck. Tomography and pulmonary function tests should also be carried out.

Treatment. Preservation of the airway is the most important measure,

if necessary by bronchoscopy, tracheotomy, or intubation, Emergency

bronchoscopy may be used with bronchoscopes of the appropriate size. Distressing

attacks of coughing are suppressed by codeine preparations. Some patients may

require admission to the intensive care unit, e.g., for treatment of shock, for

infusions, or transfusions, etc. Further procedures are shown in the table.

 

Type and Treatment of Laryngeal Trauma

 

Type of InjuryTreatment

Basic principle is to secure a free airway

Hematoma and edema. Small tears of the mucosa.

Extensive soft tissue injuries of the neck, exposed cartilage with

otherwise intact or easily reconstructable laryngeal skeleton.

 

Loss of thyroid cartilage and mucosa.

 

Laryngeal fractures, vertical or horizontal.

 

Laryngotracheal subluxation.

 

Late stenosis.

Voice rest, inhalation, steroids, tracheotomy if necessary.

Open exploration and reconstruction.

 

Mucosal grafts and stenting of the inside of the larynx.

Suturing of the fragments with or without stenting.

End-to-end anastomosis of the stumps.

Open exploration, excision of scar, mucosal or cartilaginous grafts and

stenting.

 

 

Inhalational Trauma by Chemical Toxins

 

Symptoms. Acute symptoms include severe attacks of coughing, a feeling of

burning and asphyxia, and epiphora. Chronic symptoms include hoarseness, a

feeling of dryness, clearing the throat, and coughing attacks.

Pathogenesis. The cause is escaping gases or steam after explosions of

industrial chemicals and the effect of smoke in fires. The most common chronic

toxin is inhalation of tobacco smoke.

Diagnosis. Laryngoscopy shows redness, mucosal maceration, and edema.

Treatment. Voice rest, giving up smoking, humidification of the air,

corticosteroids for edema, inhalation therapy, and laryngoscopic follow-up are

indicated.

 

Alkali and acid burns and scalds of the pharynx

 

Scalds occur in children especially. Alkali and acid burns due to mistaking the

contents of a bottle (lye, vinegar essence, cleaning fluids, etc. kept in empty

bottles) or to suicidal attempts (hydrochloric acid, caustic soda, vinegar

essence, sulfuric acid) occur principally in adults.

Symptoms. They are dramatic. There is severe pain in the mouth and pharynx,

sialorrhea, difficulty in swallowing, redness and vesicle formation on the

affected part of the mucosa, and later a flat white membrane with deep red edges

and mucosal edema appears. Caustic substances are usually swallowed so that the

mucosa of the esophagus, the stomach, and the intestine may also be involved.

The patient may be in shock.

Diagnosis. The history and local findings in the mouth, pharynx, and perioral

tissues form the basis for the diagnosis. Involvement of the stomach and

esophagus must be assessed as rapidly as possible by careful endoscopy. The type

of fluid and the amount must be determined, and if possible the ingested fluid

should be tested.

Treatment. It includes drinking large amounts of water or, even better, milk.

The acids are neutralized by sodium bicarbonate or magnesium salts. Lyes are

neutralized by diluted vinegar or lemon juice. Treatment of shock may be needed.

Local treatment of the mouth and pharynx includes lozenges or ice cubes,

lukewarm mouthwashes possibly with Lidocaine supplements, analgesics, cool

liquid diet, feeding by a nasogastric tube, or parenteral nutrition in severe

cases, antibiotics, and steroids, depending on local findings.

 

Burns of the esophagus by acid or lye

 

Symptoms. There is a typical history of initially very severe pain in the mouth,

the pharynx, behind the sternum, and in the epigastrium. There is retching,

vomiting, sialorrhea, and at times glottic edema and dyspnea. White corrosive

crusts and burned areas are to be found in the mouth and the surrounding area.

Shock becomes progressive with falling blood pressure and rising pulse, cyanosis

and pallor, cold sweats, and circulatory collapse. Later, perhaps in 24 to 48 h,

there are increasing signs of intoxication such as renal damage, hematuria,

evidence of liver damage, hemolysis, disturbance of electrolyte and water

metabolism, and occasionally involvement of the central nervous system (CNS).

There is increasing risk of perforation or mediastinitis, pleuritis,

peritonitis, and tracheoesophageal fistula. Rapid wasting occurs. If the patient

survives, dysphagia gradually sets in due to stricture formation.

Pathogenesis. The coagulation necrosis due to acids and colliquative necrosis

due to lyes penetrates to varying depths. The corrosive scars in the mouth and

pharynx may he minimal because of rapid passage, with severe degrees extending

into the esophagus and possibly the stomach and intestine. The esophagus is more

severely afflicted than the stomach in lye burns because of reflex cardiospasm.

In acid burns the stomach is more severely affected.

The time course is as follows: (1) primary local necrosis in the mouth, pharynx,

esophagus, stomach, and intestine; (2) generalized intoxication; (3) acute,

subacute, and chronic corrosive esophagitis; (4) healing of the esophagitis with

scarring or stricture; (5) late complications such as late or restenosis and

possibly malignant degeneration. The scar tissue stenosis begins about the 3rd

week.

Diagnosis. It is made from the typical history of an accident or suicide and the

typical local findings. The corrosive substance must be identified. Radiographs

are taken of the thorax and abdomen. If the corrosive burns appear to be mild,

contrast views of the esophagus are taken and a careful esophagoscopy may be

done to allow the esophagus and stomach to be examined and a feeding tube to be

introduced. Contraindications include shock and suspected perforation. Immediate

esophagoscopy is only carried out if the degree and extent of the corrosive burn

are not clear.

Treatment. If possible, large quantities of fluids such as milk, oil, etc.

should be drunk. The juice of citrus fruits or dilute 2% vinegar are given for

lye burns; magnesium oxide and antacids are given for acid burns but must be

given within 2 h. Analgesics and sedatives are given, and the patient is

admitted to an intensive care unit for intravenous management of shock,

administration of fluids, parenteral feeding, broad-spectrum antibiotics, and if

necessary gastrostomy and tracheotomy. High-dose steroids are given

intravenously.

The first careful esophagoscopy is carried out after 6 to 8 days. Dilatation can

begin at the end of the 2nd week if the radiographs and endoscopy show the

formation of a stricture. Follow-up esophagoscopies are carried out at intervals

of 10 days until mucosal defects are epithelialized. The patient is then checked

by radiography and esophagoscopy after 1, 3, 6, and 12 months.

Technique of bouginage. Two methods are available:

Early bouginage about 8 to 12 days after the burn using a thick bougie of about

14 mm in adults, 6,5 mm in children, and 10 mm in adolescents, increasing daily

in caliber until the patient can swallow without difficulty. The intervals are

then prolonged until the stenoses can no longer be demonstrated by radiography.

Late bouginage. This may only occur several weeks later.

Bouginage may take several weeks. The goal of treatment by bouginage in adults

is to achieve an esophageal lumen of about 15 mm diameter, about 10 to 12 mm in

children up to 10 years, and 10 to 14 mm in adolescents.

Dangers of bouginage include perforation of the esophageal wall. This does not

occur using the bouginage over a thread. Perforations tend to occur particularly

in the area of the necrotic stricture, in blind pouches, etc. and cause

mediastinitis, pleuritis, or peritonitis which must be drained externally.

If treatment by bouginage is unsatisfactory, operative treatment of the

stricture, partial esophageal resection and replacement by a segment of stomach

or bowel, must be considered. Because of the tendency to restenosis and to

malignant degeneration in old age, patients with esophageal strictures must be

kept under medical supervision by radiography and endosoopy at increasing

intervals.

 

FOREIGN BODIES IN THE EARS

 

Foreign bodies, both animate and inanimate, may be found in the ear. The latter

are much more frequently found, and especially so in children, and are often

introduced by the patients themselves. Inanimate objects may be divided into

those which swell with moisture, such as peas and beans, and those which do not

swell, such as beads, buttons or shells. Foreign bodies rarely cause any trouble

unless the tympanic membrane has been injured, and they may remain undetected

for years. Most complications result from ill-directed attempts at removal.

Gentle inspection will reveal the object in most cases. If it is not seen the

ear may be gently syringed, because a very small foreign body may lie out of

sight in the meatal floor, beyond the isthmus and close to the drum. When the

foreign body is seen and determined not to be of vegetable composition, removal

may be effected by syringing. The stream should be directed along that part of

the meatal wall where there is the widest space between it and the foreign body.

While the removal of a foreign body may be easily accomplished when it has not

been driven in by ill-directed interference, great difficulties may be presented

in cases of impaction, or when the object has become swollen from absorption of

fluid, or if the meatal walls have become inflamed. Such cases are best treated

in hospital. In cases of impaction it is sometimes possible to withdraw the

object by means of a fine hook. The use of forceps is inadvisable except in the

case of small or thin objects, because the jaws of the forceps often cause the

foreign body to slide further into the meatus. Some objects may be removed by

suction, a suitable catheter being used.

Attempts at removal of foreign bodies in children should not be prolonged,

because of the pain produced and the fright engendered. In such cases, and in

all cases when the object lies beyond the isthmus, it is wiser to remove it

under a general anaesthetic, often with the use of the operating microscope.

If the walls of the meatus are swollen and bleeding, it is advisable, before

operating, to insert a strip of 12 mm ribbon gauze soaked in a adrenaline

hydrochloride. Should a diffuse inflammation of the meatus have been set up by

attempts at removal, it may be best to treat the inflammation before attempting

removal. In rare instances repeated attempts at removal may have driven the

object into the middle ear, and an external operation will be required for its

extraction.

Animate foreign bodies in the external meatus are not rarely. Maggots cause

intense pain, and their presence is most likely in an ear where discharge is

already present, and which has become very offensive and bloodstained. It is

useless to attempt to syringe them out as they are firmly attached to the meatal

walls. Chloroform water or vapour must be applied to the external meatus in

order to anaesthetize or kill the maggots and so release their grip on the skin.

Thereafter they may be removed by syringing.

 

FOREIGN BODIES IN THE NOSE

 

Children, especially young children aged 2 or 3 years, frequently push foreign

bodies into the nose. Such objects may be classified as organic and inorganic.

Inorganic foreign bodies include metal objects, buttons, beads, plastic objects,

etc. These may lie undetected for many weeks, giving rise to no symptoms and

occasionally are found accidentally during routine examination. Organic foreign

bodies, such as wood, paper, cotton wool or foam rubber, produce a local

inflammatory reaction which may proceed to the formation of granulation tissue.

There is a nasal discharge from the affected side, and this quickly becomes

purulent and foul-smelling, and may be bloodstained. The object may swell with

the absorption of moisture from the mucus, but pain is seldom complained of.

In the early stage the object is situated just within the nostril and is easily

seen. In time it moves further into the nasal cavity - possibly due to the

child's habit of sniffing or possibly because it is pushed further in - and it

becomes encased with mucus, or mucopus if the object is organic in origin. In

this event it may not be seen because of the mucopus or the inflammatory

swelling of the mucous membrane.

Removal of the foreign body may be easy if it lies in the nostril. It may be

flicked out with a probe, or by getting the child to smell pepper and on closing

the opposite nostril it may be sneezed out. When the object reaches the nasal

cavity and becomes covered with secretions it becomes slippery and not easy to

grasp. A child may sit through one attempt at removal but if this fails, and

especially if the attempt produces bleeding, he is not likely to endure a

second. Accordingly it is wiser to give the child an anaesthetic for the removal

if one attempt has been made or if the object is situated far back at the

initial inspection. The anaesthetic need only be a short one for removal is

usually easily accomplished either with cupped forceps or with a metal probe,

the distal 5 mm of which have been bent to a right angle. The probe is passed,

point downwards, above the object which is pressed to the floor of the nose and

then raked out. The probe may fail with such a narrow object as a shirt button

because it slips, or with foam rubber which has become adherent to the mucosa.

In these cases the use of cup-shaped forceps is preferable. Very occasionally

the foreign body may be of such an irregular shape that it cannot be brought out

through the anterior naris, and it may have to be pushed gently into the

nasopharynx and recovered from there. The surgeon must be alive to the

possibility that there is a second foreign body present, either in the same side

or in the opposite one, and after removal of the object the nose must be

examined for this.

 

RHINOLITHS

 

Rhinoliths are calcareous masses which are occasionally found in the nose. They

may be found in one side only or they may be bilateral. The deposit of salts,

chiefly calcium and magnesium carbonates and phosphates, takes place around a

nucleus which may be organic or inorganic, and the nucleus may be a foreign body

or merely dried secretions of blood and mucus. Their presence must be considered

in any long-standing cases of nasal discharge

Symptoms. These are nasal obstruction and discharge, but if the rhinoliths have

been present for some time they may give rise to considerable destruction of the

nasal mucosa with the formation of sequestra of cartilage or bone, and the

development of an extremely unpleasant odour. Rhinoliths may attain a

considerable size and are often irregular in shape. The diagnosis is usually

easily made by inspection, but if there is any doubt palpation with a probe will

disclose the rough hard object.

Treatment. The treatment is removal under local or general anaesthesia. The

rhinolith may be too large to remove in a single piece and it may require to be

broken with a strong pair of forceps before removal in fragments. There is a

brisk haemorrhage during the removal, and it may require packing with ribbon

gauze for 2-4 hours.

 

FOREIGN BODIES IN THE PHARYNX

 

These are less common in the mouth and pharynx than in the esophagus. Small

pointed foreign bodies, such as splinters of bone, fish bones, bristles from a

toothbrush, needles, nails, or bits of wood and glass, impact in the tonsil, the

base of the tongue, the vallecula, or the lateral wall of the pharynx. Larger

foreign bodies, e.g., bits of toys, flat bones, coins, buttons, large fish

bones, bits of false teeth, etc. often impact in the piriform sinus or

hypopharynx before entering the esophagus.

Symptoms. There is pain of varying severity which is worse on swallowing, and

swallowing may be completely obstructed.

Diagnosis. It is based on the history, if the material is suspected to be

radiopaque, radiography is carried out. Radiographically, a swallow is also

carried out with a contrast medium using a colorless medium (not barium!) which

will not influence assessment of the mucosa at subsequent endoscopy. Endoscopy

is then carried out. Small impacted foreign bodies in the tonsil or base of the

tongue are often felt with the finger. Small foreign bodies in the upper pharynx

are best removed without endoscopy, using grasping forceps under direct vision.

Treatment. Instrumental extraction of the foreign body is performed as quickly

as possible because of the danger of pressure necrosis or mucosal injury causing

abscess or mediastinitis.

If a foreign body is suspected, endoscopy should be carried out as quickly as

possible using an open rigid esophagoscope. The search must be continued until

the foreign body is found or until it is certain that no foreign body is

present. Attempts to dislodge foreign bodies by eating foods such as bread is

not justifiable because this often leads to delay and allows complications to


Дата добавления: 2015-09-30; просмотров: 22 | Нарушение авторских прав







mybiblioteka.su - 2015-2024 год. (0.072 сек.)







<== предыдущая лекция | следующая лекция ==>