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Abdominal Examination in UTI - MBBS 3rd Year
A complete, systematic abdominal examination for a patient with suspected UTI, presented in the standard clinical sequence: General Survey → Inspection → Palpation → Percussion → Auscultation, followed by special manoeuvres.
BEFORE YOU BEGIN
- Position: Patient supine, relaxed, arms by the sides, knees slightly flexed (to relax abdominal muscles)
- Exposure: Nipples to pubic symphysis (fully expose the abdomen)
- Warm hands, stand on the right side of the patient
- Ask about pain site before palpating - always begin away from the painful area
I. GENERAL SURVEY (Before touching the patient)
Observe the patient from the foot of the bed:
| Finding | Significance in UTI |
|---|
| Ill-looking / flushed / sweating | Suggests systemic infection / pyelonephritis |
| Pallor | Anaemia from chronic UTI, haematuria |
| Jaundice | Associated hepatic dysfunction in severe sepsis |
| Dehydration (dry lips, sunken eyes) | Inadequate fluid intake, vomiting with pyelonephritis |
| Fever | Low-grade: cystitis; High-grade with rigors: pyelonephritis |
| Tachycardia / tachypnoea | Systemic inflammatory response, early sepsis |
| Patient lying still vs. writhing | Peritonitis (lies still) vs. renal/ureteric colic (writhes) |
II. INSPECTION OF THE ABDOMEN
Stand at the right side, inspect systematically:
1. Shape / Contour
- Normal contour - typical in uncomplicated cystitis (lower UTI)
- Suprapubic fullness / bulge - suggests bladder distension (urinary retention due to obstruction e.g. BPH, urethral stricture)
- Flank fullness - hydronephrosis, perinephric abscess
2. Skin
- Note any scars (previous surgery - nephrectomy, cystoscopy, catheterisation)
- Herpes zoster vesicles in flank/loin - can mimic UTI pain; prodromal hyperaesthesia before rash
- Surgical stoma - increases UTI risk
3. Movements with Respiration
- Normal in uncomplicated UTI
- Restricted abdominal wall movement with deep inspiration suggests peritoneal irritation (e.g. perinephric abscess)
4. Visible Pulsations / Peristalsis
- Not typically relevant to UTI; note if present to consider other diagnoses
III. PALPATION
A. Superficial Palpation (all 9 regions)
Start away from the pain site. Use the flat of the hand, gentle pressure:
- Guarding / rigidity - absent in simple cystitis; may be present in perinephric abscess or if UTI complicated by peritonitis
- Tenderness map:
| Area | Finding | Significance |
|---|
| Suprapubic / hypogastric region | Tenderness on light palpation | Cystitis (bladder inflammation) |
| Right / left iliac fossa | Tenderness | Consider appendicitis (right), ovarian pathology (differential) |
| Right / left lumbar (flank) region | Tenderness | Upper UTI, pyelonephritis, perinephric abscess |
| Epigastric region | Usually non-tender in UTI | If tender - consider differential diagnoses |
B. Deep Palpation
1. Bladder palpation
- Normally the bladder is not palpable when empty
- If the bladder is palpable as a smooth, rounded, midline suprapubic mass - indicates urinary retention (>300 mL of urine retained)
- The mass arises from the pelvis into the abdomen, is dull to percussion, and the patient may feel urge to urinate on palpation
2. Kidney palpation - Bimanual (Ballottement)
This is the most important manoeuvre for upper UTI:
"Bimanual examination, or renal ballottement, can be performed by placing the non-examining hand posteriorly at the costophrenic angle and palpating for the kidney with the examining hand through the anterior abdominal wall. Deep inspiration can help inferiorly displace the kidney to aid in exposure." - Campbell Walsh Wein Urology
Technique:
- Left hand: placed posteriorly under the loin at the costovertebral angle (CVA) - between the 12th rib and the lateral border of erector spinae
- Right hand: placed anteriorly in the corresponding flank
- Ask patient to take a deep breath - kidney descends
- Ballot the kidney between the two hands
| Findings | Significance |
|---|
| Normal kidney - not palpable (or just the lower pole of right kidney in thin adults) | Normal |
| Enlarged, tender kidney | Pyelonephritis, perinephric abscess, hydronephrosis |
| Smooth, ballottable kidney | Hydronephrosis, polycystic kidney |
| Irregular, hard mass | Renal tumour (differential) |
IV. PERCUSSION
1. Suprapubic Percussion
- Percuss from the umbilicus downward toward the pubis
- Dullness above the pubic symphysis - confirms bladder distension / urinary retention
- Normal finding: resonant (when bladder is empty)
2. Renal / Flank Percussion
- Percuss the flanks in all four quadrants
3. Murphy's Kidney Punch / Fist Percussion (CVA Tenderness) - ★ KEY SIGN ★
"The classic presentation (of pyelonephritis) is an abrupt onset of chills, fever, and unilateral or bilateral flank or costovertebral angle pain and/or tenderness." - Campbell Walsh Wein Urology
Technique (two methods):
Method 1 - Direct fist percussion:
- Ask patient to sit upright (or lean forward)
- Place one hand flat over the costovertebral angle (CVA) - angle between the 12th rib and lateral border of erector spinae muscle, posteriorly
- Strike the back of your placed hand with the ulnar border of your other fist
- Elicit from both sides; compare
Method 2 - Indirect (Murphy's kidney punch):
- Ball of the fist directly percussed over the CVA from behind
Findings:
| Finding | Interpretation |
|---|
| Positive CVA tenderness (pain elicited) | Pyelonephritis, perinephric abscess, renal calculus |
| Bilateral CVA tenderness | Bilateral pyelonephritis |
| Negative (no pain) | Favours lower UTI (cystitis) |
Important: CVA tenderness is absent in uncomplicated cystitis. Its presence immediately suggests upper urinary tract involvement.
V. AUSCULTATION
Usually not significant in UTI but always complete the examination:
- Bowel sounds: Normal in UTI; reduced / absent in paralytic ileus (suggests complicated peritonitis)
- Renal bruit: Over the renal angles / epigastrium - a bruit here suggests renal artery stenosis (relevant as a cause of recurrent/resistant hypertension + UTI)
- Absent bowel sounds in a febrile patient with flank pain - may indicate retroperitoneal or peritoneal extension of infection
VI. SPECIAL MANOEUVRES / ADDITIONAL EXAMINATION
1. Deep Palpation for Ureteric Tenderness
- Upper ureteric point: At the junction of lateral border of rectus abdominis and the umbilical horizontal plane (at the umbilical level, 2 cm lateral to midline)
- Middle ureteric point: At the junction of a line joining the ASIS and the pubic tubercle, at the lateral border of rectus abdominis
- Lower ureteric point: Only accessible on per rectal / per vaginal examination
Tenderness at these points suggests ureteric stone (important differential for UTI with loin pain)
2. Psoas Stretch Test (in suspected perinephric abscess / retroperitoneal irritation)
- Patient in lateral decubitus
- Extend the hip passively - pain suggests irritation of psoas (perinephric collection)
3. Per Rectal Examination (in male patients)
Always mention this in viva:
- Assess the prostate gland: size, consistency, tenderness
- Exquisitely tender, swollen prostate = acute prostatitis (UTI variant in males)
- Enlarged, smooth, non-tender prostate = BPH (predisposing factor for UTI in males)
4. Per Vaginal Examination (in female patients)
- Vaginal discharge? (suggests vaginitis / STI as differential, reduces UTI probability)
- Cervical excitation tenderness? (suggests PID - important differential)
- Assess for pelvic organ prolapse (can cause incomplete bladder emptying → recurrent UTI)
- Urethral palpation: urethral diverticulum, Skene's gland abscess
VII. FINDINGS SUMMARY TABLE
| Sign | Lower UTI (Cystitis) | Upper UTI (Pyelonephritis) | Urinary Retention |
|---|
| General appearance | Looks well / mildly ill | Looks ill, flushed, toxic | Distressed, in pain |
| Fever | Absent / low-grade | High-grade with rigors | Absent |
| Abdominal contour | Normal | Normal / flank fullness | Suprapubic fullness |
| Suprapubic tenderness | Present | May be present | Present (tense) |
| Flank/loin tenderness | Absent | Present | Absent |
| Bladder palpable | No | No | Yes (midline, dull) |
| Kidney ballottement | Not enlarged | Enlarged / tender | Not enlarged |
| CVA tenderness (fist) | Negative | Positive (hallmark) | Negative |
| Bowel sounds | Normal | Normal / reduced | Normal |
HOW TO PRESENT IN VIVA
"On abdominal examination, the patient was febrile and appeared ill. The abdomen was flat with no visible distension. On palpation, there was deep tenderness in the right lumbar and right iliac fossa regions. The kidney was ballottable and tender on the right side. Bladder was not palpable. On percussion, there was positive right-sided costovertebral angle tenderness (Murphy's kidney punch positive on the right). Bowel sounds were present. These findings are consistent with right-sided acute pyelonephritis."
Sources: Campbell Walsh Wein Urology (Bimanual examination, pyelonephritis); Smith & Tanagho's General Urology 19e; Tintinalli's Emergency Medicine; Rosen's Emergency Medicine