Technique Station Principles and Scoring

A technique station gives you a door card, a standardized patient and a few minutes to prove that you can turn a listing into a safe, specific set up and explain it as you go. Examiners are not watching for a dramatic thrust; they are scoring a chain of small, observable decisions, and one broken link (the wrong side, the wrong contact, a missed safety screen) can cost the whole station. This chapter breaks that chain into its parts so that every set up you perform, on the exam and in practice, is deliberate and defensible.

Section 1What a technique station tests

The station in outline

Practical exams of this kind are usually built as a circuit of timed stations. At a technique station you read a door card before entering: it typically gives the patient's age and complaint, the region, the relevant findings (a listing, a motion palpation result or both) and the task, such as "set up and verbalize an adjustment for the listed segment." Inside, a standardized patient (a trained person who plays the role consistently for every candidate) waits on the table or a stool, and one or more examiners score a checklist. Format details, timing and scoring rules vary and change over time, so read the current official candidate materials for the exam you are taking and practice to those instructions. What follows is how stations of this type are generally structured and what they generally reward.

The examiner is checking whether your hands and words match a correct plan. That means the score is built from observable behaviors: where the patient lies, where you stand, which part of your hand touches which part of the vertebra, what your other hand is doing, which way you intend to drive, and whether you said it clearly. A technically elegant set up performed silently can lose points that a slightly slower, fully narrated set up earns.

The seven elements of every set up

Every diversified style set up, in any region, can be described with the same seven elements. Learn to say them in the same order every time so that nothing is skipped under pressure.

Two more items wrap around these seven: the safety screen at the start (red flags, contraindications, consent) and the preload and verbalization at the end. Together they make the sequence shown in Figure 9.1.

Reading the door card

Use the reading time to make three decisions before you touch the door handle. First, what is the listing and what does it mean in motion terms (for example, "T6 PR" means the spinous has rotated right and the body has rotated left, so right rotation is restricted). Second, which set up fits the region and the patient (prone, supine, seated or side posture, and whether anything on the card, such as age, osteoporosis or pregnancy, changes your choice). Third, is there anything that says do not adjust: a red flag in the history, a neurologic sign, trauma, anticoagulation, or symptoms that suggest a cervical artery problem. If the card holds a red flag, the station may be testing whether you recognize it, and the correct performance is to explain why you would not adjust and what you would do instead.

A standard station script

How stations are generally scored

Checklist scoring is typical of standardized practical exams. Items are written as observable yes or no behaviors ("identified correct segmental contact," "stated line of drive"). Some programs and exams also mark certain items as critical, meaning that missing them (for example, adjusting a patient with a stated contraindication, or causing pain without stopping) can outweigh everything else that was done well. Exact weights, pass points and the list of critical items are set by the examining body and can change; the safest preparation is to treat every safety step as critical and every set up element as something you must both do and say.

A practical consequence: partial credit exists only if the examiner can see or hear it. If you change your plan mid station ("I realize the contact should be on the left"), say so clearly and correct the hands. Silent correction is invisible; a spoken correction shows reasoning.

Section 2Listings and segmental analysis for the station

Why the listing system matters

A listing is shorthand for the direction a segment has moved or the direction it cannot move. The same vertebral fault can be written three ways: as a static position of the spinous process (Palmer Gonstead), as a position of the vertebral body in standard orthopedic terms (National, sometimes called the body motion or Diversified system), or as a restriction of motion found on motion palpation. Door cards may use any of these, and many examiners expect you to translate between them aloud. The translation is mechanical once you remember one fact: the spinous process and the vertebral body rotate in opposite directions.

Palmer Gonstead listings (C2 to L5)

The Palmer Gonstead system describes where the spinous process has moved relative to the segment below. A typical listing has up to three letters:

• P (posterior): the vertebral body has moved posterior relative to the one below, the basic misalignment assumed in this system.
• R or L: the side toward which the spinous process has rotated. PR means the spinous is to the right, so the body has rotated to the left.
• S or I: describes the lateral flexion (wedging) component, written as whether the disc space is opened superiorly or closed inferiorly on the side of spinous rotation. PRS means the spinous is right and the side of spinous rotation is open (the body has laterally flexed away from the spinous side); PRI means the spinous is right and that side is closed.

Some Gonstead cervical analysis names the side of posterior body rotation rather than the spinous side, because cervical spinous processes are short and bifid. Learn the convention your door card is using; if a card is ambiguous, state your interpretation aloud before you set up ("I am reading PR as spinous right, body rotated left").

Atlas and occiput listings

The atlas has no true spinous process, so its Palmer Gonstead listing describes the whole ring. The first letters describe the tilt of the anterior tubercle in the sagittal plane: AS (anterior superior) or AI (anterior inferior). Next comes laterality, the side toward which the atlas has slipped (R or L). The last letter gives rotation on that same side: A if the side of laterality has rotated anterior, P if it has rotated posterior. So ASRP reads "anterior superior, laterality right, and the right side has rotated posterior." In National terms, the same atlas is laterally translated right and rotated right (the right lateral mass posterior). Occiput faults are usually written in body motion terms (occiput flexion or extension, lateral flexion, or posterior rotation on one side) or as a restriction found on motion palpation.

National and motion palpation listings

The National system describes the vertebral body with the same words used for any joint: flexion, extension, lateral flexion left or right, rotation left or right, and sometimes lateral or anteroposterior translation. A motion palpation listing names the motion that is restricted (also called fixation or hypomobility): "T6 right rotation restriction" means T6 cannot rotate right on T7, which is what you would expect if it is held in left rotation. The correction is to induce the restricted motion.

From listing to contact side: the rotation rules

Almost every side of contact question reduces to two rules:

1. Transverse process, lamina, articular pillar and mammillary contacts go on the side of posterior body rotation, which is the side opposite the spinous rotation. Driving that posterior side forward (P to A) rotates the body back toward neutral.
2. Spinous process contacts go on the side toward which the spinous has rotated, and push it back toward the midline (lateral to medial). This is the logic of the Gonstead spinous contact and the diversified spinous push.

For lateral flexion restrictions in the cervical spine, the contact goes on the side toward which you want to induce lateral flexion, the head is laterally flexed over the contact, and the drive is lateral to medial. Chapter 10 applies these rules to each region.

Motion palpation and end feel at the station

Some stations give you the finding; others ask you to palpate first and then set up. Motion palpation tests the segment through each plane while you feel the interspinous or facet region: flexion and extension (spinous processes separate and approximate), lateral flexion (the interspinous space opens on the convex side), and rotation (the spinous moves toward the side opposite body rotation). Joint play (end play) is tested at the end of passive range by springing the segment; a normal joint has a slightly springy end feel, while a fixated joint has a hard, abrupt end feel with reduced play. Pain, muscle guarding, or a soft, boggy end feel suggests an acute or inflammatory process, and an empty end feel (the patient stops you before any tissue resistance) suggests a serious lesion and is a reason to stop and evaluate further.

Section 3Preloading, tissue pull and the thrust

The phases of a manipulative thrust

A high velocity, low amplitude (HVLA) adjustment has a predictable force profile. During positioning the patient and the segment are placed so that the target joint, and as few other joints as possible, are brought toward the end of their passive range. During preload the doctor adds a steady compressive force through the contact until the soft tissue slack is gone and the joint is at tension, the edge of the elastic barrier. The thrust (impulse) is a brief, fast increase in force along the line of drive, followed by resolution, a quick release back toward the preload level and then off. In laboratory measurements the impulse usually lasts on the order of a tenth of a second or a little more, and preload and peak forces vary widely by region and by clinician: cervical forces are far smaller than thoracic or lumbar forces. What matters for the board is the qualitative pattern: a controlled preload, a fast impulse of small amplitude, and no wind up or rebound.

Taking out slack and tissue pull

Slack is the give in the skin, fascia and muscle between your contact point and the bone, plus the free play in the joint before tension is felt. If you thrust through slack, the force is absorbed by soft tissue, the contact slides, and the patient feels a skin pinch instead of a joint movement. Tissue pull is the deliberate drawing of the skin and superficial tissue with the contact hand as it settles on the bone, usually in the direction of the intended correction, so that the contact sits firmly on the segmental contact with the skin already stretched. Gonstead teaching places particular emphasis on tissue pull; diversified teaching folds it into "take the slack out." Either way, the observable behavior at the station is the same: settle the contact, draw the tissue, then add pressure along the line of drive until the joint is at tension.

• Too little preload: the thrust starts from slack, amplitude increases to compensate, and the move becomes long, uncomfortable and less specific.
• Too much preload: the patient braces, the joint is compressed, and some patients find the hold itself painful. In the neck, excessive preload often comes with excessive rotation.
• Correct preload: firm but comfortable, the patient can breathe and relax, and you feel the joint's elastic barrier.

Depth, speed and amplitude

The adjustive impulse is fast (high velocity) and short (low amplitude). Amplitude is kept small so that the joint is taken just through the elastic barrier into the paraphysiological space, not beyond the limit of anatomical integrity. Depth is the distance the contact travels in the thrust; it is set by region (shallow in the neck, a little more in the thoracic and lumbar spine), by tissue thickness, and by the patient's size and bone quality. Speed comes from a quick contraction of the doctor's chest and arm muscles, often combined with a body drop (a short, controlled drop of body weight through extended arms) in prone thoracic and pelvic work. Good technique keeps the elbows slightly flexed and locked, the shoulders over the contact and the body weight behind the line of drive, so that the impulse comes from the trunk rather than from pushing with the hands.

Cavitation and what it does and does not mean

An audible release (cavitation) during an HVLA thrust comes from rapid pressure change within the synovial fluid as the joint surfaces separate, producing a gas bubble. Once a joint has cavitated it usually cannot do so again for roughly 15 to 20 minutes, the refractory period. The sound tells you that a joint gapped, but not necessarily the joint you targeted, and clinical improvement does not depend on hearing it. Telling a patient "you may hear a pop; it is gas in the joint, not bones cracking" is a standard part of explaining the procedure. Chasing cavitation with repeated thrusts at the same level is poor practice.

Why the station does not deliver a real thrust

Standardized patients are examined by many candidates in a day. Repeated real thrusts would expose them to cumulative risk and soreness, would make the patient's responses inconsistent, and would add nothing that an examiner cannot score from the set up, the preload and the spoken description. Practical exams of this type therefore generally instruct candidates to set up to preload and then verbalize the thrust; candidates who actually thrust risk a serious scoring penalty and, more importantly, patient harm. Read the current candidate instructions to confirm exactly what is expected, and practice stopping cleanly at preload until it is automatic. Verbalizing well means naming the type of thrust, its direction in anatomical terms, and the depth or amplitude in qualitative words ("a shallow, high velocity, low amplitude impulse, P to A and slightly I to S").

Section 4Patient safety and communication during technique

Screening before any set up

Every technique station is also a safety station. Before touching the region, ask the questions that would change your decision. The cervical spine needs a screen for cervical artery dissection and upper cervical instability; the thoracic spine needs a screen for visceral referral and bone fragility; every region needs a screen for fracture, infection, malignancy and neurologic compromise.

Provocative positional tests that hold the neck in extension and rotation (for example the classic vertebrobasilar tests) have poor sensitivity and do not rule out dissection, and some programs no longer teach them as screening tools. History and a focused neurologic screen are the key. If your program or the station asks for them, perform them gently and say what a positive finding would mean, but do not claim that a negative test makes manipulation safe.

Explaining and obtaining consent

Informed consent at the station is short but complete. The patient should hear what you plan to do (in plain words), why, what they may feel (pressure, a pop), the common risks (local soreness or stiffness for a day or two, occasionally headache after neck work), the rare serious risks relevant to the region (for cervical manipulation, the rare association with cervical artery dissection and stroke; for thoracic and rib work, rib fracture, especially with low bone density), the alternatives (mobilization, soft tissue work, instrument adjusting, exercise, no treatment), and that they may decline or stop at any time. Then ask a direct question and wait for an answer: "Do you have any questions? Is it all right if I proceed?" Document consent in practice; at the station, saying "I would document informed consent" can be a scored item.

Draping, touch and dignity

Explain before you touch, especially near the chest, ribs, gluteal region or pelvis. Use a gown and drape so that only the area needed is exposed, and use a flat hand or a pillow barrier for contacts near breast tissue. For supine thoracic and rib work, ask the patient to cross their own arms and tell them where your hand will go. Offer a chaperone for sensitive areas according to local policy. These behaviors are often explicit checklist items and are always part of professional practice.

Monitoring and the stop rule

Watch the patient's face, breathing and words throughout positioning and preload. Stop immediately if the patient reports dizziness, visual change, nausea, numbness, sharp or radiating pain, or simply asks you to stop. Release slowly, return the head or trunk to neutral, keep the patient lying down if they are dizzy, and reassess: vital signs, a brief neurologic screen (cranial nerves, coordination, speech, pupils), and the symptom itself. If signs suggest a vascular or neurologic event, call emergency services and do not leave the patient. At the station, a candidate who notices a scripted reaction and stops appropriately usually demonstrates exactly the behavior being scored.

Section 5Common technique station errors

Errors of analysis: wrong segment, wrong side

The most expensive errors happen before the hands move. Candidates count levels from the wrong landmark, misread PR as "contact right TP," or confuse the side of restriction with the side of malposition. Protect yourself with a fixed habit: count from two landmarks (for example C7 by the extension test and the inferior angle of the scapula at about T7), remember the thoracic rule of threes for transverse process position, and say the translation aloud before contacting.

Errors of contact

• Soft contact point: finger pads or the soft palm instead of the pisiform, thenar, index MCP or thumb. The force spreads and the segment is not specific.
• Contact on soft tissue: between transverse processes, on the paraspinal muscle belly, or on the wrong part of the vertebra (on the spinous when the plan was a transverse contact).
• Wrong level: often one level off in the thoracic spine because of spinous angulation.
• Wrong hand position: wrist not extended for a pisiform contact, so the contact rolls; elbow straight and locked in hyperextension, so the thrust cannot be controlled.

Errors of line of drive

The line of drive must agree with both the listing and the joint plane. Pushing straight down into the table in the neck, or with an inferior angle against a 45 degree cervical facet, compresses the joint rather than gliding it. In the thoracic spine, a line that ignores the kyphosis (straight down at T3 or T10, where the spine slopes away) wastes force and can jam the joint. Figure 9.5 shows the principle.

Errors of stabilization and stance

The indifferent hand is not a passenger. In a prone thoracic set up it reinforces the contact or fixes the adjacent segment; in a supine cervical set up it cradles the occiput and controls the head so that the thrust is local; in side posture it fixes the shoulder or pelvis. A floating stabilizing hand lets the whole region move with the thrust, which is both nonspecific and less safe. Stance errors include standing too far from the table (so you push with the arms), standing on the wrong side for the contact, a narrow base that cannot absorb a body drop, and shoulders that are not over the line of drive.

Errors of table use and patient handling

• Table height: too high and you cannot get your body over the contact; too low and you bend at the waist. A common guide is about mid thigh to fingertip height for prone work, adjusted to the patient's size.
• Table pieces: headpiece not lowered or angled for comfort, chest or pelvic piece left cocked when a drop is not intended, face paper missing.
• Positioning: the neck left in extension on a flat headpiece, arms dangling awkwardly, a large patient placed off center.
• Handling: moving the patient's head abruptly, rotating to end range before contact, or not supporting the head when helping the patient up.

Errors of communication

Failure to verbalize is the most common silent error. Many candidates perform every element correctly but never say the line of drive, the segmental contact or the consent. Others speak in jargon to the patient ("I'm going to adjust your PRS") or speak only to the examiner and ignore the patient. The fix is a two track script: plain words to the patient ("I'm going to place my hand on your mid back"), precise terms to the examiner ("contact point right pisiform, segmental contact left TP of T6").

Words worth knowing