Presentation on theme: "Institute of Surgical Research „A” Modul - Surgical Techniques"— Presentation transcript:
1 Institute of Surgical Research „A” Modul - Surgical Techniques A1. MODUL - Asepsis and AntisepsisA2. MODUL - Surgical DeontologyA3. MODUL - WoundsA4. MODUL - OperationsA5. MODUL - BleedingA6. MODUL - Clinical aspects of shock:endotracheal intubationuse of laryngoscope+ practical examination
3 Endotracheal intubation Definition: introducing a tube through the mouth (or nose) into the trachea to secure open airways.Benefits as compared to extratracheal techniques:1. Anatomic dead space is decreased by 50%; alveolar ventilation increasing (important in high risk surgical patients).2. Air and anesthetic gas mixture could enter only the lungs and not the stomach.3. Vomiting and aspiration can be avoided.4. Suctioning will remove mucus from lungs.5. Atelectasis can be eliminated in case of correct artificial ventilation.6. Position of the patient (prone position) does not affect ventilation.7. Different drugs can be given intratracheally.
4 Technique of endotracheal intubation 1. Preparing the equipments 2. Positioning the patient3. General or local anesthesia 4. Oxygenization 5. Positioning the head, pharyx-larynx axis 6. Muscle relaxation Intubation with laryngoscope 8. Depth of intubation 9. Controlling 10. Fixation
5 1. Preparing the equipments Ruben-balloon with valve andmask tube adaptors, adhesive tapesuction catheter, suction pumplaryngoscopelaryngeal masksyringeGuedel-tubeMagill-forcepsendotracheal tubes
6 2. Positioning the patient Most preferred: the patient is laid in supine position, the head is toward the person who is performing the procedure.
7 3. General or local anesthesia Under General anesethesia, or local anesthesia should be induced in the patient’s pharynx and larynx.It is also practical to apply surface anesthesia: vagal excitation is less, the patient may tolerate the tube better, arrhytmias and laryngospasm after extubation are rare. Apply 10% Lidocain spray (2 or 3 spurts - 1 spurt=4.8 mg)If the distal end of tube is also sprayed with Lidocain before intubation, the patient will also tolerate the tube after recovering consciousness.
8 4. OxygenizationDeliver oxygen with a face mask for at least 3 min. If intubation fails (in short time - no more than 1 min) in theapnoic patient, apply ventilation through the mask, and thenintubation should be performed again only in well-oxygenatedpatient.
9 5. Positioning the head 1.In supine position there is an oblique angle between the oral and pharyngeal axis. There are two positions for alignment of the two axes and making the passage of the endotracheal tube easier:1. Jackson position: Patient is laid in supine position without a pillow. The palm is placed on the patient’s forehead and pushes it down, so the head is tilted backward at the atlanto-occipital joint (cervical spine is also turned backward).
10 6. Positioning the head 2.2. Modified Jackson position: In supine position (short-necked, fat patient or in torticollis) a pillow (10 to 15 cm) is placed under the patient’s nape, and the head will be tilted so that the mouth should be opened. The oral axis coincides with the pharyngeal one, and the glottis can be seen with the laryngoscope underneath.
11 7. Intubation with laryngoscope 1. - Grasp the laryngoscope by the left hand and insert the curved blade into the mouth along the median line of the tongue.- If necessary, push the tongue to the left with the blade. - The end of the blade is between the base of tongue and the epiglottis, in the plica glossoepiglottica (lifting the base of the tongue the epiglottis can also be elevated).
12 8. Intubation with laryngoscope 2. … and the triangular glottis with its peak upward can also be seen.If the epiglottis and the front of trachea cannot be seen, the assistant will press down the base of thyroid cartilage and the cricoid cartilage (Sellick maneuver).
13 9. Controlling the intubation Stethoscope auscultation over both axillar lines alternately. (If the tube is inserted too deeply, it is usually in the right bronchus, and ventilation on the left side cannot or slightly be heard.)We listen the chest at a point about the end of tube. Knock the chest wall gently at the upper part of thorax (thus the outflow of air can be heard through the tube).Insufflation through the tube induces a symmetrical moving of the thorax (rising and sinking).Oesophageal intubation could be avoided by the use of capnography (ETCO2 is zero);
14 10. Deepness of intubation Can be read on the side of the tube.Distance of tracheal bifurcation from the upper incisor (nipper) is about 27 cm in males and about 23 cm in females. The distal end of tube has to be positioned in the trachea 1-3 cm above the bifurcation <= without this the ventillation is insufficient!Without blowing of cuff <= danger of aspiration!The balloon has an automatic valve, which shuts down after the removal of inflating syringe. The pressure of cuff could be max mmHg maximum.
15 11. FixationA bite protector (in case of Guedel-tube) or a wet roller bandage in the mouth of the patient can be used to avoid biting of tube. The tube and the bite protector are fixed with an approx. 30 cm long strip of adhesive tape, which is sticked on the face of the patient in cross form <= the function of tube can be faulty without fixing.
16 Difficulties during intubation 12. SUMMARY IDifficulties during intubation1. PatientCallused stricture of mouth, inflammatory lock-jaw, pouting and loose teeth, tumor in mouth, pharynx and tongue; deformed mandibula, tonsillar abscess, struma dislocating laryngx, stricture of trachea, short and thick neck, dental prosthesis.2. MedicalLack of appropriate equipment, improper posture (laying), inappropriate muscle relaxation.In case of danger of aspiration avoid breathing through the mask; suck up continuously blood, mucus, regurgitating stomach content; Pressing the cricoid cartilage by finger (Sellick-maneuver) - the danger of regurgitation from the stomach can be reduced.
17 Complications of endotracheal intubation 13. SUMMARY II.Complications of endotracheal intubationInjuries: on lips, or tongue; teeth, mucosa of pharynx and larynx; vocal cord, bleeding of pharynx;Increased airway resistance: in case of narrow tube, especially children;Obstruction of lumen: by blood or excretion, foreign body; the end of the tube can be closed by the tracheal wall or by the cuff;Improper intubation: into the stomach or main bronchus;Slipping out: improper fixationInappropriate sedation of patient can cause coughing, spasm consequent breathing difficulty.
19 Practical examThe practical exam consists of the execution of 3 exercises at 3 workstations. Place: outer and inner operating theatersExercisesScrubbing and Dressing – workstation No. 1; 5 students;(max. 12 min); outer surgical theater;2. Techniques of tying knots – workstation No. 2; 5 students;Demonstration of a surgical knot, method is optional (max 10 min); inner surgical room;3. Suture techniques - workstation No. 3; 5 students;Applying simple interrupted or vertical mattress sutures (min. 3 stiches); (max 10 min); inner surgical room
20 Requirements 1. Scrubbing and Dressing Taking on cap and mask, handwash with soap (from hands to at least 3 finger-breadth above the elbow), Rinse hands and arms with water regularly, Clean the nails with brush and rinse (1 min)Chemical disinfection: scrubbing with alcoholic detergent (5x1 min), From 3 finger-breadth under the elbow to distal on every surface, From middle arm to distal on every surface, From previous one to distal on every surface, On every surfaces of wrist and arm, On every surfaces of arms, Gowning, Glowing with assistant of nurse2. Techniques of tying knots3-4 min practice and then demonstration of an optional method of tying knots: two-handed square knot (sailor’s knot), surgeon’s knot or the Viennese knot.3. Suture techniques Applying of a simple interrupted or vertical mattress suture (3 stiches); tying knot with an instrument.