Suctioning the Airway

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13 Suctioning the Airway

Note 1: This book is written to cover every item listed as testable on the Entry Level Examination (ELE), Written Registry Examination (WRE), and Clinical Simulation Examination (CSE).

The listed code for each item is taken from the National Board for Respiratory Care’s (NBRC) Summary Content Outline for CRT (Certified Respiratory Therapist) and Written RRT (Registered Respiratory Therapist) Examinations (http://evolve.elsevier.com/Sills/resptherapist/). For example, if an item is testable on both the ELE and WRE, it is shown simply as (Code: …). If an item is testable only on the ELE, it is shown as (ELE code: …). If an item is testable only on the WRE, it is shown as (WRE code: …).

Following each item’s code, the difficulty level is indicated for the questions on that item on the ELE and WRE. (See the Introduction for a full explanation of the three difficulty levels.) Recall [R] level questions typically expect the exam taker to recall factual information. Application [Ap] level questions are more difficult, because the exam taker may have to apply factual information to a clinical situation. Analysis [An] level questions are the most challenging, because the exam taker may have to use critical thinking to evaluate patient data to make a clinical decision.

Note 2: A review of the most recent versions of the Entry Level Examination (ELE) has shown that an average of 4 questions (out of 140), or 3% of the exam, will cover suctioning of the airway. A review of the most recent versions of the Written Registry Examination (WRE) has shown that an average of 3 questions (out of 100), or 3% of the exam, will cover suctioning of the airway. The Clinical Simulation Examination (CSE) is comprehensive and may include everything that an advanced respiratory therapist should know.

MODULE A

1. Manipulate suctioning devices by order or protocol (ELE code: IIA8) [ELE Difficulty: R, Ap, An]

c. Troubleshoot any problems with the equipment

If no vacuum is felt at the catheter tip, several causes are possible and must be investigated.

2. Suction catheters

Suctioning catheters are used to remove secretions and foreign material from the trachea. They come sterile and individually packaged. It is highly recommended that the outer diameter (OD) of the catheter be no more than one-half the inner diameter (ID) of the airway that it is passing through. This guideline is intended to minimize obstruction of the airway, so that the patient is able to breathe around the catheter.

Table 13-1 presents the recommended suction catheter sizes for the various endotracheal or tracheostomy tubes. The practitioner also can easily compare the relative sizes of the tube and suction catheter at the bedside before suctioning. Suction catheters are sized by the French (Fr) scale of the OD. Endotracheal and tracheostomy tubes are sized by ID and OD in millimeters and often by OD in French. Review Table 12-1 if necessary.

TABLE 13-1 Recommended Suction Catheter French Sizes for Endotracheal and Tracheostomy Tubes*

Age Tube Internal Diameter (mm) Size of Suction Catheter (Fr)
NEWBORN
1,000 g 2.5 5
1,000-2,000 g 3 6
2,000-3,000 3.5 8
3,000 g to 6 mo 3.5-4 8
PEDIATRIC
18 mo 4 8
3 yr 4.5 8
5 yr 5 10
6 yr 5.5 10
8 yr 6 10
ADULT
16 yr 7 10
Normal-size woman 7.5-8 12
Normal-size man 8-8.5 14
Large adult 9-10 16

(TT), the suction catheter’s one half the inner diameter of the ET or TT.

* For suctioning of endotracheal tubes (ET) and tracheostomy tubes

a. Calculations related to catheter size (math review)

The following formula can be used to calculate the OD of any suction catheter to determine the endotracheal or tracheostomy tube size with which the suction catheter may be used:

Suction catheter size (Fr) × 0.33=OD(mm) of suction catheter

b. Get the necessary equipment for the procedure

The term open-airway suctioning is used here to refer to a suctioning procedure on a patient who is spontaneously breathing room air after being disconnected from the source of supplemental oxygen. For example, in a patient with a normal upper airway, the oxygen mask is removed for nasotracheal suctioning. Also, in a patient with an endotracheal or a tracheostomy tube, the aerosol T-piece (Briggs adapter) or ventilator circuit is removed to allow suctioning.

These types of catheters have been in use for many years. The two basic types are shown in Figure 13-4. Closing the thumb control, as shown in Figure 13-5, allows the vacuum to be selectively applied to the secretions when desired. The tips of the catheters can vary greatly. A considerable amount of effort has been spent trying to develop a catheter tip that most effectively removes secretions without damaging the tracheal mucosa. Figure 13-6 shows some of the catheter tips that have been developed to minimize mucosal damage. Note that all feature at least one opening in the catheter that is back from the opening at the tip. Compare this with the single end opening found on the oral suction catheter (see Figure 13-2). The side openings are designed to prevent the vacuum from being applied to the tip when it makes contact with the mucosa.

Notice in Figures 13-4 and 13-6 that most catheters are straight throughout their length. All of these catheters tend to enter the right mainstem bronchus during deep suctioning. This is because the right mainstem bronchus’s angle off of the trachea is less acute than that of the left mainstem bronchus. Therefore, it is difficult, if not impossible, to use any of these catheters to suction the left mainstem bronchus. The Coudé catheter has an angled tip to make it easier to guide into the left (or right) mainstem bronchus (see Figure 13-6, C). When these catheters are used, the direction of the thumb control valve can help determine the angle of the bent tip.

Use of these traditional types of catheters during open-airway suctioning always results in some level of hypoxemia. The newer, insufflating suction catheter is designed to provide alternatively oxygen through the catheter or vacuum for suctioning. The thumb control end of the catheter is modified with two male-type tubing connectors and a way to switch the lumen of the catheter between them. The thumb control is set to direct the oxygen through the catheter and into the patient as the catheter is advanced. After the catheter has been deeply placed into the trachea for suctioning, the thumb control is switched from delivering oxygen to applying suction.

c. Get the necessary equipment for the procedure

The term closed-airway suctioning is used here to refer to a suctioning procedure in which the patient remains connected to the original source of oxygen. This may be done through a special aerosol T-piece or, more commonly, for an intubated patient receiving mechanical ventilation with positive end-expiratory pressure (PEEP). In addition, closed-airway suctioning may reduce the risk of ventilator-associated pneumonia (VAP). This suctioning method is preferred in patients who are likely to become hypoxic when disconnected from their oxygen source.

In closed-airway suctioning systems, a flexible, clear plastic sheath covers the catheter to maintain its sterility (Figure 13-7). The practitioner does not need gloves. When used for patients who need frequent suctioning, self-contained systems have a financial advantage over the traditional catheter and gloves suctioning method, because they can be reused. Closed-system suction catheters come with either the traditional straight tip or the Coudé tip for selective bronchial suctioning.

Another device used to create a sealed system for endotracheal tube suctioning consists of an elbow adapter that has an inner plastic sleeve or diaphragm. As the traditional catheter is inserted into the opening on the elbow adapter, the sleeve or diaphragm conforms to the catheter so that no air leakage occurs (Figure 13-8). This ensures that the ventilator-delivered volumes and pressures are not lost through a leak.

d. Put the equipment together andmake sure that it works properly

Figure 13-4 shows the attachment of an open-airway suction catheter to the vacuum tubing, and Figure 13-7 shows the attachment of a closed-airway suction catheter to the vacuum tubing. The other end of the vacuum tubing is attached to the vacuum regulator system.

With open-airway suctioning, only a hand covered by a sterile glove can be allowed to touch the area of the catheter that enters the patient’s trachea. The practitioner’s other hand also should be gloved. A clean glove is acceptable for that hand, because it does not touch the part of the catheter that will enter the patient’s trachea.

While holding the body of the catheter, the thumb control valve, and the vacuum connector with the sterile-gloved hand and the vacuum tubing with the cleangloved hand, slip the vacuum tubing over the catheter’s vacuum connector. The seal should be tight so that no vacuum leak occurs. From now on, only the sterile-gloved hand may touch the part of the catheter that makes contact with the patient. The clean-gloved hand may touch only the thumb control valve and vacuum tubing. If the catheter is contaminated, it must be discarded.

The catheter can be tested for patency and vacuum at the tip by the three methods described earlier in the discussion on oropharyngeal suction devices. Note that only a sterile glove may be touched against the tip of the suction catheter to check for a vacuum.

The practitioner does not need gloves when a selfcontained catheter is used for closed-airway suctioning, because the sheath covers the catheter to prevent contamination.

3. Specimen collectors

a. Get the necessary equipment

A variety of specimen collectors (commonly called Lukens traps) are available. They are packaged as sterile so that no contamination of the sputum sample occurs with nonpatient organisms. Figures 13-9 through 13-12 show the key features and functions of several sputum sample collectors. The sputum sample is obtained through a suction catheter or bronchoscope.

The specimen jar has volume markings. It screws into either a special lid used to suction the specimen or a regular lid. The regular lid is used for shipment to the laboratory. The special lids used in the systems featured in Figures 13-9 and 13-10 must be connected to a sterile catheter. Figure 13-11 shows a system with its own catheter. The vacuum source is provided to these specimen collectors by a length of vacuum tubing, as in the previously described suction catheter systems. Figure 13-12 shows a DeLee system, which is sometimes used in the delivery room. The physician, nurse, or practitioner uses mouth suction to remove secretions from the newborn. In all of these examples, after the sample has been collected, the special lid is unscrewed and replaced with the regular specimen jar lid.

MODULE B

3. Put the equipment together and make sure that it works properly

Vacuum regulators are preassembled by the manufacturer. The two basic types are described here. Components must be added to make them fully functional.

a. Portable vacuum systems

Portable units are designed to be moved with the patient. They may be mounted on a small platform (Figure 13-13) or on a wheeled cart. The portable systems generally include an electrically powered vacuum pump with an ON/OFF switch and a collection bottle. Some units have a control valve for adjusting the level of negative pressure. A negative-pressure gauge is used to determine how much vacuum is being applied. A length of rubber vacuum tubing is used to pass the negative pressure from the pump to the collection bottle. Another length of vacuum tubing is used to pass the vacuum through to the suction catheter. Portable systems are not as powerful as central vacuum systems. They are not very effective at suctioning out large amounts of thick secretions.

In general, the following steps are followed to make the units operational:

b. Central vacuum systems

Central (wall) vacuum systems usually are available at each patient’s bedside in all special care units. Each of the wall outlets is connected through a hospital-wide piping system to a large, electrically powered vacuum pump. It is capable of generating a negative pressure far greater than that needed in most patient care situations. A regulator is used to reduce the vacuum to the desired clinical level (Figure 13-14). Either a Quick Connect or a Diameter Index Safety System (DISS) connector is used to attach the regulator to the central vacuum system.

Most regulators have a selector knob that allows the user to turn the vacuum off (OFF setting) or to switch between full vacuum (FULL setting) and a regulated level of vacuum (REG setting). The FULL setting opens the unit to the maximum level of vacuum available from the central pump. The REG setting allows the user to adjust the vacuum level through a wide range.

In general, the following steps are followed to make the units operational:

c. Troubleshoot any problems with the equipment

MODULE C

Tracheal or oral secretions must be actively removed by suctioning whenever the patient cannot clear them out and there is a risk of airway obstruction. Suctioning may be needed in patients who are unconscious and lack swallowing or coughing reflexes or in patients who may be too weak to cough effectively to remove tracheal secretions. Often the physician writes a standing order to suction the patient on a regular basis or as needed. However, in many institutions, a protocol exists to suction any patient who is at risk of obstruction of the airway. For example, a comatose patient who vomits should have the mouth suctioned out even if no specific physician’s order is written.

Suctioning secretions from a patient’s trachea, by any method, places the patient at risk. The following two factors must be understood, identified when they occur, and prevented or corrected.

1. Prevent hypoxemia during the suctioning procedure (ELE code: IIID9) [ELE Difficulty: R, Ap, An]

Suctioning the trachea removes air (including oxygen), as well as secretions, from the lungs. However, hypoxemia can be minimized by hyperoxygenating the patient for 1 to 2 minutes before suctioning. It is generally recommended that the patient receive 100% oxygen, if possible. Infants younger than 6 months should be given a fractional concentration of inspired oxygen (FIO2) only 10% to 20% greater than their base level to minimize the risk of retinopathy of prematurity (ROP), also known as retrolental fibroplasia.

Before beginning the procedure, check the patient’s arterial blood gas results or Spo2 to see whether the patient is hypoxic. The Spo2 also can be monitored throughout the suctioning procedure to see how low the saturation drops (review the chapter for guidelines on oxygenation and limiting hypoxemia). After suctioning, give the patient supplemental oxygen until the Spo2 reaches at least 90%. The patient’s chart also should be checked for any history of cardiac problems. Sudden hypoxemia from suctioning can result in life-threatening dysrhythmias, such as premature ventricular contractions (PVCs). Check the patient’s pulse rate and rhythm before and after suctioning. If the patient is using a cardiac monitor, it should be watched for rate and rhythm changes that are related to the suctioning procedure. Tachycardia is frequently seen with hypoxemia. Check the blood pressure of any patient who has suctioning-related dysrhythmias. The patient’s vital signs should return to normal when oxygenation is restored.

Any modern mechanical ventilator can be set to deliver 100% oxygen. The most current ventilators have a 100% oxygen button designed just for this purpose. Pushing it results in the patient receiving pure oxygen for 1 to 2 minutes (depending on the manufacturer). Several sigh breaths also can be delivered. A closed-airway suction catheter can be used with the ventilator, as discussed earlier, to minimize hypoxemia.

For a spontaneously breathing patient, a nonrebreathing mask can be applied and set to deliver close to 100% oxygen. If a nonrebreathing mask is not available, turn up the oxygen flow or percentage on whatever appliance the patient is using. A spontaneously breathing patient with an endotracheal or tracheostomy tube can have 100% oxygen delivered through a Brigg adapter/aerosol T-piece. A manual resuscitation bag also can be used to give the patient several sigh breaths.

All patients must be reoxygenated before another attempt at suctioning is made. Giving 100% oxygen after the suctioning episode helps the patient to reoxygenate faster. Giving several sigh breaths also helps reoxygenation to occur faster than normal tidal volume breathing does.

2. Perform endotracheal or tracheostomy tube suctioning on the patient (Code: IIIC2) [Difficulty: ELE: R, Ap; WRE: An]

The American Association for Respiratory Care (AARC) Clinical Practice Guidelines listed at the end of the chapter present all the suctioning indications. Key indications include:

The procedure for endotracheal or tracheostomy tube suctioning is the same for both types of tubes, except that the catheter does not need to be inserted as far into the tracheostomy tube before hitting the carina. The generally accepted steps in the procedure are as follows:

Box 13-1 presents the hazards and complications of endotracheal suctioning.

3. Perform nasotracheal suctioning on the patient (Code: IIIC1b) [Difficulty: ELE: R, Ap; WRE: An]

See the AARC Clinical Practice Guidelines listed at the end of the chapter for all of the suctioning indications. Key indications include:

The nasotracheal suctioning (NTS) procedure is performed on a patient who does not have an endotracheal tube or tracheostomy tube. Significant clinical practice is needed to become proficient.

The generally accepted steps in the procedure are as follows:

11. Suction the trachea:

4. Perform oropharyngeal suctioning on the patient (Code: IIIC1c) [Difficulty: ELE: R, Ap; WRE: An]

If a patient is unable to swallow saliva or food properly or has vomitus in the mouth, it must be removed. Signs of improper swallowing may include drooling, gagging, retching, and coughing. Oropharyngeal suctioning is performed on intubated and unintubated patients. In many institutions, the suctioning device may be used more than once.

The generally accepted steps for oropharyngeal suctioning of an unintubated patient are as follows:

MODULE D

2. Determine the appropriateness of the prescribed therapy and goals for the identified pathophysiologic state (Code: IIIH3) [Difficulty: ELE: R, Ap; WRE: An]

The standard physician’s order for suctioning states that suctioning should be done as needed (PRN). The respiratory therapist or the nurse, or both, should be able to evaluate the patient and perform suctioning when it is justified. The physician should not suction the patient on a set schedule (e.g., every hour). This could result in the patient being suctioned when it is not needed. Also, the therapist and nurse could not suction the patient more often. The respiratory care plan should allow the therapist to make the following changes.

MODULE E

BIBLIOGRAPHY

American Association for Respiratory Care (AARC) Clinical Practice Guideline. Endotracheal suctioning of mechanically ventilated adults and children with artificial airways. Respir Care. 1993;38:500.

American Association for Respiratory Care (AARC) Clinical Practice Guideline. Nasotracheal suctioning: 2004 revision and update. Respir Care. 2004;49:1080.

American Association for Respiratory Care (AARC) Clinical Practice Guideline. Nasotracheal suctioning. Respir Care. 1992;37:898.

American Association for Respiratory Care (AARC) Clinical Practice Guideline. Suctioning of the patient in the home. Respir Care. 1999;44:99.

American Association for Respiratory Therapy. Guidelines for the prevention of nosocomial infections. AAR Times. 1983;7(9):49-52.

Burton GG. Patient assessment procedures. In: Barnes TA, editor. Respiratory care practice. St Louis: Mosby, 1998.

Cairo JM, Pilbeam SP, editors. Mosby’s respiratory care equipment, ed 8, St Louis: Mosby, 2009.

Caldwell SL, Sullivan KN. Suctioning protocol. In Burton GG, Hodgkin JE, editors: Respiratory care, ed 2, Philadelphia: Lippincott, 1984.

Durbin CG. Airway management. In Cairo JM, Pilbeam SP, editors: Mosby’s respiratory care equipment, ed 7, St Louis: Mosby, 2004.

Eubanks DH, Bone RC. Comprehensive respiratory care, ed 2. St Louis: Mosby, 1990.

Fink JB, Hess DR. Secretion clearance techniques. In: Hess DR, MacIntyre NR, Mishoe SC, et al, editors. Respiratory care principles and practice. Philadelphia: WB Saunders, 2002.

Hess DR, Branson RD. Airway and suctioning equipment. In Branson RD, Hess DR, Chatburn RL, editors: Respiratory care equipment, ed 2, Philadelphia: Lippincott Williams & Wilkins, 1999.

Lewis RM. Airway care. In: Fink JB, Hunt GE, editors. Clinical practice in respiratory care. Philadelphia: Lippincott Williams & Wilkins, 1999.

May RA, Bortner PL. Airway management. In: Hess DR, MacIntyre NR, et al, editors. Respiratory care: principles and practice. Philadelphia: WB Saunders, 2002.

McIntyre D. Airway management. In: Wyka KA, Mathews PJ, Clark WF, editors. Foundations of respiratory care. Albany, NY: Delmar, 2002.

Pettignano MM, Pettignano R. Airway management. In: Barnhart SL, Czervinske MP, editors. Perinatal and pediatric respiratory care. Philadelphia: WB Saunders, 1995.

Plevak DJ, Ward JJ. Airway management. In Burton GG, Hodgkin JE, Ward JJ, editors: Respiratory care, ed 4, Philadelphia: Lippincott-Raven, 1997.

Rarey KP, Youtsey JW. Respiratory patient care. Englewood Cliffs, NJ: Prentice-Hall, 1981.

Roth P. Airway care. In Aloan CA, Hill TV, editors: Respiratory care of the newborn and child, ed 2, Philadelphia: Lippincott, 1997.

Scott AA, Koff PB. Airway care and chest physiotherapy. In Koff PB, Eitzmann DV, Neu J, editors: Neonatal and pediatric respiratory care, ed 2, St Louis: Mosby, 1993.

Shapiro BA, Kacmarek RM, Cane RD, et al. Clinical application of respiratory care, ed 4. St Louis: Mosby, 1991.

Simmons KF, Scanlan CL. Airway management. In Wilkins RL, Stoller JK, Kacmarek RM, editors: Egan’s fundamentals of respiratory care, ed 9, St Louis: Mosby, 2009.

White GC. Equipment theory for respiratory care, ed 4. Clifton Park, NY: Thomson Delmar Learning, 2005.

Wilkins RL, Stoller JK, Kacmarek RM, editors. Egan’s fundamentals of respiratory care, ed 9, St Louis: Mosby, 2009.

Wilkins RL, Specht L. Fundamentals of physical examination. In Wilkins RL, Krider SJ, Krider SJ, editors: Clinical assessment in respiratory care, ed 5, St Louis: Mosby, 2005.

Wilkins RL, Hodgkin JE, Lopez B. Lung sounds: a practical guide. St Louis: Mosby, 1988.

Wojciechowski WV. Incentive spirometers and secretion evacuation devices and inspiratory muscle training devices. In Barnes TA, editor: Core textbook of respiratory care practice, ed 2, St Louis: Mosby, 1994.

SELF-STUDY QUESTIONS FOR THE ENTRY LEVEL EXAM See page 596 for answers

SELF-STUDY QUESTIONS FOR THE WRITTEN REGISTRY EXAM See page 621 for answers