A-E Examination: Ovarian Torsion

Author – Dr Kalyani Shinkar Editor Dr James Mackintosh

Last updated 20/08/24

Table of Contents

How to Use

Candidate:

  1. Read the brief below (1 minute). 
  2. Take a brief history and a perform a A-E examination (10 minute).
  3. Handover the patient (1 minute)
  4. Answer viva questions (2 minutes).

Patient/Examiner:

  1. Familiarise yourself with the history & examination findings 
  2. After completing the history, viva the candidate

Candidate Brief

You are an F1 in paediatric A&E. Miss Jess Lee is a 14-year-old girl who has presented with her parents to paediatric A&E with sudden-onset severe abdominal pain. Please take a brief history and perform an A-E examination of this patient.

Background and Presenting Complaint

  • Miss Lee has a 2-hour history of severe sudden-onset lower abdominal pain. The pain is sharp and constant. The pain does not radiate anywhere and is 10/10 in severity. There are no triggering, relieving, or exacerbating factors. Her mum gave her paracetamol shortly after the pain started, but this did not help.
  • She feels nauseous and has vomited once since the onset of pain. No blood in the vomit.
  • No changes to bowel habits or urinary symptoms.
  • No fever.
  • Her last menstrual period was 5 days ago.
  • She usually has regular periods. Her cycle length is 28 days. Her periods last 4 days on average. She denies ever having any problems with her periods, including heavy menstrual bleeding, intermenstrual bleeding, or dysmenorrhoea. Menarche occurred at age 12.
  • She denies having abnormal vaginal discharge or vulvovaginal itching.
  • She is not sexually active.

Past Medical History

  • Nil Comorbidities

Drug History and Allergies

  • Not taking any regular medications.
  • She is allergic to penicillin and experiences anaphylaxis if she takes it

Introduce yourself, confirm the patient’s identify, and gain consent to examine the patient

  • Patient confirms full name and DOB
  • She gives consent for you to examine her

End of bed inspection

  • She appears severely distressed and is writhing in pain

Airways

  • Assess the patency of the patient’s airway, ensure that the patient is able to breathe effectively, and there are no airway obstructions.
    • Her airway is patent, as she is able to talk in full sentences 
    • There are no airway obstructions

Breathing

  • Inspect for signs of respiratory compromise (e.g. cyanosis, see-saw breathing, use of accessory muscles, nasal flaring, pursed lip breathing, or increased work of breathing)
    • There are no signs of respiratory compromise
  • Respiratory rate
    • RR = 20
  • O2 sats
    • O2 sats = 99% on RA
  • Palpate for tracheal deviation and symmetrical chest expansion
    • Trachea is central and there is symmetrical chest expansion
  • Percuss
    • Percussion note is resonant throughout
  • Auscultate for reduced breath sounds or added sounds
    • Vesicular breathing bilaterally
    • No added sounds

Circulation

  • Inspection (e.g. pale, sweating, clammy)
  • Temperature of hands
    • Warm and well-perfused
  • CRT
    • 1 second
  • Heart Rate
    • 110bpm
  • Blood pressure
    • 110/70mmHg
  • Insert 2 large bore IV cannulae into each antecubital fossae
    • Take bloods (FBC to look for anaemia and raised white cell count, U&Es and LFTs for baseline, CRP for infection/inflammation, and serum β-hCG to check for pregnancy)
  • JVP
    • Not raised
  • Apex beat
    • Palpable in the left 5th ICS midclavicular line
  • Heart sounds
    • Normal
  • Fluid status
    • Euvolaemic
  • Perform an ECG
    • Sinus Tachycardia

Disability

  • Level of consciousness (AVPU or GCS if a neurological cause for the patient’s presentation is suspected)
    • Alert
  • Pupils
    • Equal and reactive to light
  • Blood glucose levels
    • 5.0
  • Temperature
    • 37.0°C

Exposure

  • Fully expose the patient by removing their clothing whilst preserving their dignity
  • Look for any signs of trauma, swelling, bruises, scars, rashes, or signs of a DVT
  • Abdominal examination:
    • Severe tenderness in the lower abdomen. No abdominal rebound tenderness, rigidity, or guarding.

After completing the initial A-E assessment, reassess! Re-assess the patient to identify any additional clinical changes and effectiveness of any interventions you have performed.

1. What are your differential diagnoses?

  • Ovarian Torsion (due to sharp, severe, sudden-onset lower abdominal pain that is associated with vomiting)
  • Ruptured Ovarian Cyst (important differential in a female presenting with sharp, severe, sudden-onset lower abdominal pain)
  • Appendicitis (important differential in someone presenting with lower abdominal pain)
  • Ectopic Pregnancy (this is unlikely given the patient’s age and they are sexually inactive. However, it’s always important to consider ectopic pregnancy in a woman of childbearing age who presents with lower abdominal pain)

2. Given a likely diagnosis of Ovarian Torsion, how would you manage this patient?

  • Call for help immediately
  • Escalate to the obstetrics and gynaecology registrar and consult paediatrics
  • Do a pregnancy test
  • Order bloods (FBC, U&Es, LFTs, CRP, and serum β-hCG)
  • Arrange for an urgent pelvic ultrasound (NB - A transvaginal ultrasound is more commonly performed; however, given her age, a pelvic ultrasound would be more appropriate)
  • Prescribe analgesia
  • Make the patient NBM and prescribe IV fluids based on the patient’s weight

3. Please Handover this patient to the obstetrics and gynaecology registrar using the SBAR or equivalent format.

  • Hi, my name is Dr. Joe Bloggs and I’m calling from paediatric A&E. Can I please confirm who I am speaking to?
  • I’m really worried about a patient I’ve just examined, I think she has ovarian torsion.
  • She is a 14-year-old girl called Jess Lee who presented with a 2-hour history of severe, sharp, sudden-onset lower abdominal pain. She has vomited once since the onset of pain. 
  • Her last menstrual period was 5 days ago and she is not sexually active. 
  • She has no comorbidities or allergies.
  • On inspection, she appeared severely distressed and was writhing in pain. 
  • Her airway was patent
  • Her respiratory rate was 20 and O2 sats were 99% on room air.
  • She was haemodynamically stable. I have inserted 1 large bore IV cannula and have taken bloods, including FBC, U&Es, LFTs, CRP, and serum β-hCG. 
  • She was alert, apyrexial, and her BM was normal.
  • On examination, there was severe tenderness in lower abdomen. There was no rigidity or guarding. 
  • I have done a pregnancy test, ordered a pelvic ultrasound, and prepped the patient for surgery (I’ve made her nil by mouth and have prescribed IV fluids). I’ve also prescribed paracetamol and an anti-emetic for her. 
  • Can you please come and see her? In the meantime, is there anything you would like me to do?

What is Placenta Praevia?

Ovarian torsion is an uncommon but serious medical condition in which the ovary twists on its supporting ligaments, cutting off blood supply to the ovary. In ovarian torsion, the ovary typically twists around two ligaments: the suspensory ligament of the ovary (also known as the infundibulopelvic ligament) and the ovarian ligament. The suspensory ligament of the ovary contains the main ovarian vessels (ovarian artery and vein), the ovarian nerve plexus, and lymphatic vessels.

Twisting of the suspensory ligament of the ovary can therefore compress these structures and compromise arterial inflow, venous outflow, and lymphatic drainage. This can lead to ischaemia, venous congestion, oedema, and eventually necrosis, loss of ovary, and infertility if not treated promptly. Other complications include haemorrhage caused by ovarian rupture, and abscess and/or sepsis in cases where a necrotic ovary becomes infected.  

Causes and Risk Factors

There are various causes and risk factors associated with ovarian torsion:

  • Large ovarian mass: The most significant cause of ovarian torsion is an ovarian mass ≥5cm. The mass could be an ovarian cyst or tumour, and can cause the ovary to become enlarged and more prone to twisting.
  • Pregnancy: Pregnant women are at increased risk of ovarian torsion due to increased hormonal stimulation of the ovaries, leading to ovarian enlargement.
  • Fertility Treatments: Similar to pregnancy, fertility treatments, such as IVF, can lead to increased hormonal stimulation of the ovaries, leading to ovarian enlargement.
  • Anatomic Variations: Abnormalities such as long fallopian tubes or atypical ligamentous attachments increase the risk of ovarian torsion.
  • Age: Women of reproductive age are the most affected age group.
  • Physical Activity: Rigorous physical activity can occasionally trigger ovarian torsion.
  • Previous History: There is an increased risk of recurrence in women who have had previous episodes of ovarian torsion.

Clinical Presentation

  • Abdominal or Pelvic Pain: Patients with ovarian torsion commonly present with sudden, sharp, severe pain in the lower abdomen or pelvis. However, there are variations in presentation. The pain may be dull, constant, or intermittent and may radiate to the abdomen, back, or flank.
  • Nausea and Vomiting: Nausea and vomiting is a common symptom and may be triggered or exacerbated by the severe abdominal pain.
  • Fever: Low-grade fever may be present as a result of inflammation or develop in cases where ovarian torsion is complicated by infection or necrosis.
  • Abdominal Distension: Ovarian torsion can cause abdominal distension, especially if there is associated ascites secondary to lymphatic oedema and haemorrhagic necrosis.
  • Abnormal Vaginal Bleeding or Discharge: This may occur if the ovarian torsion involves a tubo-ovarian abscess

Diagnosis

The diagnosis of ovarian torsion requires a combination of clinical assessment, laboratory tests, and imaging studies.

Clinical Assessment

  • History: A hallmark symptom of ovarian torsion is sharp and severe pain in the lower abdomen or pelvis, which may be associated with nausea and vomiting.
  • Examination
    • Vital Signs: It’s important to check for fever and signs of haemodynamic instability, which may indicate sepsis or haemorrhage.
    • Abdominal Examination: Patients will often have tenderness in the lower abdominal region, within the pelvis, or diffuse abdominal tenderness. Moreover, there may be an abdominal mass if the patient has a large ovarian cyst or tumour. If the patient has signs of peritonitis (e.g. rebound tenderness, guarding, or rigidity), this could be suggestive of ovary necrosis.
    • Pelvic Examination: A pelvic exam should be carried if the patient presents with pelvic pain, vaginal bleeding, or vaginal discharge.

Laboratory Tests:

  • FBC (anaemia caused by haemorrhage, raised white cell count)
  • CRP (infection/inflammation)
  • Serum β-hCG (to rule out ectopic pregnancy and identify pregnancy, a risk factor for ovarian torsion)

Imaging

  • TVUS (or pelvic ultrasound) with Doppler: TVUS with Doppler is often the 1st line imaging study that can help to visualise the ovaries and detect signs of torsion. The key features of ovarian torsion on ultrasound are an enlarged ovary, ovarian oedema, and abnormal blood flow detected by Doppler sonography. Additional findings may include free fluid within the peritoneum, distended fallopian tube, or twisted vascular pedicle that is represented by the “whirlpool sign”.
  • CT or MRI scan: CT and MRI scans are not generally used to diagnose ovarian torsion. However, they may be ordered to provide additional information, especially if the diagnosis remains uncertain, or to rule out other differential diagnoses, such as acute appendicitis.

Management

  • Initial Management: The initial priority is to stabilise the patient and prepare them for surgery. This will often involve giving analgesia and anti-emetics if relevant, making the patient nil by mouth, administering IV fluids, and prescribing antibiotics in cases of infection.
  • Surgery: Surgery is the definitive management for ovarian torsion. It involves untwisting the ovary (detorsion) in order to restore blood flow, thereby preventing ovarian necrosis and preserving ovarian function. However, if there is evidence of ovarian necrosis, additional measures may be required, such as removing the necrotic tissue or performing an oophorectomy (removal of the affected ovary).
  1. https://www.ncbi.nlm.nih.gov/books/NBK560675/
  2. https://radiopaedia.org/articles/ovarian-torsion?lang=gb

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